A practical Hawaii travel guide written for Singapore visitors — real flight options from Changi via the U.S. west coast or Tokyo, ESTA rules, Singapore Customs on the way back, and how to navigate U.S. tipping, voltage, and tax.
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For our Singapore readers
~18–24h
Total SIN to HNL via U.S. west coast or Tokyo
ESTA ~US$40
File 72+ hours before flying
USD only
All prices on this site are US dollars
18h behind
Hawaii is 18 hours behind Singapore (previous day)
Hawaii from Singapore is a two-leg trip — there's no nonstop SIN-to-HNL service, so every routing goes via either the U.S. west coast or Tokyo. Total elapsed time runs 18 to 24 hours depending on layover length. That's a real long-haul, but the route ecosystem is mature: Singapore Airlines' nonstop flights to Los Angeles, San Francisco, and Seattle put you one domestic hop from Honolulu, and the Tokyo routing on SIA / JAL / ANA breaks the journey roughly in half.
What surprises Singapore travellers is the rest of it — that you do need an ESTA approved before you board, that MediShield Life does not cover overseas medical treatment (and Integrated Shield Plan coverage varies and isn't a substitute for travel insurance), that the menu price isn't the price you pay (and U.S. tipping is on top of Hawaii's local tax and an already-charged service charge), and that the macadamia nuts you want to bring home are fine but the fresh lei is not. We built this page to put all of it in one place so you can stop opening 14 tabs.
We've been writing this site for more than 20 years from the visitor side of Hawaii, the same vantage point as our readers. Everything below is what we wish someone had handed us on our own first trip.
John & Tori Derrick · Founders
Aloha from the team
We're a small independent team that has been planning, writing about, and visiting Hawaii since 2002. Every recommendation on this site is from someone who has actually driven the road, eaten at the restaurant, or hiked the trail. No scraped filler, no generic "best of" lists, and no recommendations from someone who hasn't done the homework.
There's no nonstop Singapore–Hawaii service. Every routing connects via either the U.S. west coast or Tokyo — both work, both run roughly 18 to 24 hours total elapsed time depending on layover. Confirm schedules on the airline's site before booking; the trans-Pacific lineup shifts.
One-stop · west coast
Singapore via Los Angeles
SIN → LAX → HNL
~22h total
Singapore Airlines flies SIN–LAX direct on the A350-900ULR — at roughly 17–18 hours, one of the longest scheduled flights in the world. Hawaiian Airlines, United, Delta, or American then take the ~5-hour onward leg to Honolulu. The longest single leg of any Singapore–Hawaii routing, but the most schedule flexibility on the HNL hop.
One-stop · west coast
Singapore via San Francisco
SIN → SFO → HNL
~21h total
Singapore Airlines also runs SIN–SFO nonstop, often the easiest connection of the three U.S. west-coast options — SFO is often less chaotic than LAX, though connection experience still depends on terminal and airline. United, Hawaiian, or Alaska then take the ~5h 30m SFO–HNL leg.
One-stop · west coast
Singapore via Seattle
SIN → SEA → HNL
~22h total
Singapore Airlines flies SIN–SEA direct. Often competitive on price, especially in Singapore's off-peak windows. Alaska Airlines runs the SEA–HNL onward leg most reliably; Hawaiian Airlines also runs the route.
One-stop · Tokyo
Singapore via Tokyo
SIN → HND/NRT → HNL
~18–21h total
Singapore Airlines, JAL, or ANA run the ~7-hour SIN–HND or SIN–NRT segment; Hawaiian Airlines, JAL, ANA, or ZIPAIR (LCC) take the ~7-hour Tokyo–Honolulu onward leg. Often the shortest total elapsed time of any one-stop routing, and frequently the cheapest fare. The trade-off is a tighter layover window — Tokyo connections aren't as forgiving as LAX/SFO.
One-stop · via Asia hub
Via Hong Kong, Manila, or Seoul
HKG · MNL · ICN
~22–26h total
Cathay Pacific (via HKG), Philippine Airlines (via MNL), and Korean Air or Asiana (via ICN) all offer one-stop options with longer total elapsed time. Generally a fallback rather than first choice — usually only competitive on price in deep promotional windows.
Worth considering
Multi-stop trip
Multi-city ticket
Variable
A two- or three-night stopover in Tokyo or Los Angeles on the outbound is the most common way Singapore travellers split a Hawaii trip — it cuts the long-haul perceived length, lets you bank some sleep before the U.S. arrival process, and is often free or near-free on a Singapore Airlines round-the-Pacific ticket. Real value for first-time Hawaii visitors from Singapore.
Need help choosing between the four islands? Our Which Island quiz walks through the trade-offs in about two minutes.
Entry
Documents and the ESTA
Singapore has been part of the U.S. Visa Waiver Program since 1999, so every Singapore passport holder needs an approved ESTA before boarding the U.S.-bound leg of their trip. The application is short — a few demographic and travel-history questions — but every detail must be accurate. Don't leave it to the airport.
Required
Valid Singapore passport
Biometric Singapore passport (all passports issued since 2006 have the embedded chip). ICA advises Singapore citizens travelling overseas to have at least six months of passport validity before departure, even where a destination's formal rule may be less strict — the U.S. doesn't impose a six-month rule on Singaporeans, but most airlines and travel insurers prefer that safety margin and ICA's six-month guidance is the baseline to plan against.
Required
ESTA approval
Currently around US$40 fee (raised from US$21 on 30 September 2025 — confirm the exact amount on the official site at the time of application). Valid two years or until your passport expires, whichever comes first. Apply at esta.cbp.dhs.gov at least 72 hours before departure. Approval is usually instant but can take days if flagged. Use the official .gov site only — many lookalike sites charge a markup for the same form.
Worth it for frequent travellers
Global Entry
Singapore is one of the small set of countries with a bilateral Global Entry partnership. If you fly to the U.S. more than once a year, the application (US$120 for five years) gives you fast-track CBP entry at U.S. airports including HNL, and unlocks TSA PreCheck on U.S. domestic connections. Application is via ttp.cbp.dhs.gov plus a Singapore-side authorisation step.
Every price on this site — and on every menu, hotel rate card, tour, and rental quote in Hawaii — is in U.S. dollars. The Singapore dollar usually buys about 74 U.S. cents, so a useful rough conversion is multiply USD by 1.35 to land near SGD. The catch: the sticker price isn't the final number on the receipt. Singapore restaurants typically add a 10% service charge plus 9% GST to bills; Hawaii adds a 4.5% tax at the till PLUS expects 18–20% tipping on top — that's a different ratio than home.
~0.74USD per SGD (approximate)
$100 USD≈ S$135
$1,000 USD≈ S$1,350
$5,000 USD trip≈ S$6,750 planning budget
Exchange rate fluctuates — check xe.com the week of your trip for a current number.
What to use, what to leave home
Visa, Mastercard, AMEX (JCB partly)
Accepted nearly everywhere. Tap-to-pay and Apple Pay / Google Pay are standard. JCB has decent acceptance in Hawaii's Japanese-tourist economy but spottier on the U.S. mainland — carry a Visa or Mastercard alongside if you're routing through LAX or SFO. A card with no foreign transaction fee — YouTrip, Revolut Singapore, Wise, or the multi-currency tiers from Standard Chartered or HSBC SG — saves you roughly 2–3% per transaction versus a standard Singapore credit card.
NETS, PayNow don't work overseas
NETS (Singapore's domestic debit network) and PayNow are domestic-only systems and won't function in the U.S. Some Singapore bank debit cards on the Plus or Cirrus international network will work at U.S. ATMs and at terminals running Visa Debit or Mastercard Debit — check the back of your card. Bring a credit card (or two from different issuers) as your primary U.S. payment method.
Some small U.S. bills
S$150–250 worth of USD in US$1, $5, and $20 notes covers tips, valet parking, parking attendants, hotel housekeeping, and the occasional farmer's market stall. Order from your bank a week before you fly — Changi's currency exchange booths consistently have worse rates than the in-branch rate.
Tax is added at the till
Hawaii's General Excise Tax plus county surcharge runs ~4.5%, and accommodations are taxed at roughly 15.5–19% all in (statewide TAT rose to 11% on January 1, 2026, and adds to county surcharges). The US$200 hotel rate you see online is closer to US$235–240 at checkout. Restaurant menus list pre-tax, pre-tip prices — so a US$50 menu price is closer to US$65 after tax and a standard tip.
Service culture
Tipping in Hawaii (higher than at home)
Singapore restaurants already add a 10% service charge to most sit-down bills, so the concept of paying more than the food line isn't foreign — but the U.S. rate is roughly double that, and Hawaii follows mainland U.S. norms. Under Hawaii's tip-credit rules, some tipped workers (restaurant servers, valets, hotel housekeeping, tour guides) may be paid less than the standard minimum wage, and tips remain a normal part of their compensation. Under-tipping reads as rude in a way it doesn't at home, where 10% is already on the bill. Build it into the trip budget from day one.
Restaurants (sit-down)
18–20%
Bartender / cocktail
US$1–2/drink
Taxi / Uber / Lyft
15–20%
Hotel housekeeping
US$2–5/night
Valet / bell staff
US$2–5
Tour guide (half day)
US$5–10/person
Tour guide (full day)
US$10–20/person
Travel medical insurance is the unmissable one
MediShield Life does not cover overseas medical treatment. Many Integrated Shield Plans include limited emergency overseas medical cover, but caps, conditions, and reimbursement rules vary by insurer and product — don't treat it as a substitute for travel insurance. U.S. medical bills are routinely the highest in the world: a single ER visit can run several thousand U.S. dollars, a hospital admission with imaging or surgery moves into five figures fast, and emergency medical evacuation back to Singapore from Maui or the Big Island can exceed S$150,000 on its own.
Buy travel insurance before you leave. Singapore providers include AIG Travel Guard, NTUC Income, FWD, MSIG, Etiqa, and Allianz Travel — compare via PolicyPal, MoneySmart, or the Singapore brokerage of your choice. International comparison sites like SquareMouth and InsureMyTrip let you compare U.S.-trip policies across providers; Travelex sells direct if you'd rather skip the comparison step. A two-week Hawaii trip with comprehensive coverage typically runs S$200–500 for a couple. The math is brutal in one direction.
Your Singapore driving licence is generally accepted in Hawaii for tourist driving, but Hawaii drives on the right — the opposite of Singapore. Take a moment in the rental lot before you pull out. An International Driving Permit from AAS (Automobile Association of Singapore, around S$20) sits alongside (not instead of) your Singapore licence; not strictly required but some rental firms appreciate seeing it. Rental cars require a credit card (not debit) in the renter's name; most rental fleets are automatics by default. We use Discount Hawaii Car Rental — it aggregates the big-name agencies.
Phone — eSIM beats roaming
Singtel, StarHub, M1, and TPG all offer U.S. roaming "day pass" products at roughly S$10–20 per day. A U.S. travel eSIM (Airalo, Saily, Holafly) runs roughly US$10–25 for a week of data — usually cheaper than carrier roaming and instant to activate. Singapore phones are almost universally factory-unlocked. Most Hawaii lodging and public spaces have decent Wi-Fi, so you can also lean on that for everything except live navigation.
Adapter required (230V → 110V, Type G → A/B)
Hawaii runs 110V on flat two- or three-pin Type A/B sockets — completely different from Singapore's 230V Type G three-pin square plug (the same plug used in the UK). Bring a plug shape adapter for every device. Most modern chargers (phone, laptop, camera) accept 100–240V — check the brick's fine print. Hair dryers and curling irons usually do not; use the hotel's.
18 hours behind, Hawaii has no DST
Singapore runs SGT (UTC+8) year-round with no daylight saving. Hawaii runs HST (UTC-10) year-round with no daylight saving. Hawaii is a fixed 18 hours behind Singapore — when it's 8 a.m. Tuesday at Changi, it's 2 p.m. Monday in Honolulu. You arrive on the previous calendar day, often before your Singapore departure time. The flight home is the rougher leg.
Timing
When to go (from a Singapore point of view)
Hawaii's weather is more even than its marketing suggests — the difference between best and worst month is mostly about price, crowds, and what's happening in the ocean. From a Singapore airport, the calendar reshapes around Singapore school holidays and the overlap with peak U.S. travel periods.
Jan
BusyWhale season + surf
Feb
PeakCNY week
Mar
BusySG March break
Apr
ValuePost-break sweet spot
May
ValueBefore mid-year holidays
Jun
PeakSG mid-year + US summer
Jul
PeakUS summer
Aug
BusySG National Day
Sep
ValueSG one-week break
Oct
ValueBefore Deepavali
Nov
BusySG year-end start
Dec
PeakSG year-end + US Xmas
Peak — book early, pay moreBest value — sweet spotBusy but workable
April to mid-May and September to mid-October are the two sweet-spot windows from a Singapore airport — fares from Changi come off their peak, Hawaiian weather is at its most reliable, and crowds thin between Singaporean school breaks and U.S. school holidays. The Singapore mid-year school break (MOE lists 30 May–28 June for 2026) overlaps with peak U.S. summer demand and pulls Singapore family fares up. The September one-week break (5–13 September 2026 per MOE) is often one of the best-value windows of the year for families. The November–December year-end break (21 November–31 December 2026 per MOE) is roughly six weeks long and lands squarely inside U.S. Thanksgiving and Christmas pricing — historically the most expensive fares of the year. Confirm current school terms on the MOE website before locking dates.
Whale season (humpbacks visible off Maui and Big Island) runs roughly December through April, which conveniently aligns with the Singapore late-year holiday demand for warmer travel.
Singapore Customs is strict on tobacco, dutiable liquor, undeclared overseas purchases, and controlled food or plant materials. The duty-free allowance is tied to how long you've been away. The Singapore Food Agency (SFA) and NParks regulate food and plant-material imports; commercially packaged macadamia nuts, coffee, chocolate, clothing, books, and art are generally straightforward, but fresh fruit, living plant material, soil, and many fresh animal products are not. When in doubt, declare it — Singapore Customs is professional but not lenient on undeclared restricted items.
Away 48+ hours
S$500
GST import relief per adult traveller on goods purchased abroad. Couples can combine. Excludes alcohol, tobacco, and certain controlled goods.
Away under 48 hours
S$100
Reduced GST relief for short trips. Unlikely to apply to Hawaii — even a fast Singapore–Hawaii–Singapore turnaround runs longer than that.
Alcohol allowance
2 L
Per adult traveller, in one of these combinations: 1 L spirits + 1 L wine, 1 L spirits + 1 L beer, 1 L wine + 1 L beer, 2 L wine, or 2 L beer. Reduced from 3 L in April 2019. Singapore Customs has the current rules and a duty calculator on its site.
Souvenirs: what comes home, what doesn't
Fine to bring back (declare if needed)
Commercially packaged roasted macadamia nuts
Kona coffee beans and ground coffee
Chocolate-covered mac nuts and shelf-stable confectionery
Hawaiian sea salt (sealed, commercial packaging)
Canned and dried Hawaiian products
Aloha shirts, clothing, jewellery, books, art
Commercial honey from a regulated producer (declare it)
Restricted or seized
Tobacco of any kind — no duty-free allowance; all tobacco is dutiable, declare or face penalty
Chewing gum (long-standing Singapore restriction)
All fresh fruit (pineapple, papaya, mango, citrus)
Fresh vegetables, herbs, cuttings
Fresh lei with seeds or living plant parts
Raw or fresh meat, fresh dairy, raw seafood from countries with disease history
Soil, sand, shells with living organisms
Singapore Customs penalties for failure to declare dutiable or prohibited items start at S$200 per case for minor under-declarations and rise sharply for cigarettes, alcohol over the threshold, or biosecurity violations. The rule of thumb: declare anything dutiable, declare anything food- or plant-related, and let the officer tell you it's fine. Sources: Singapore Customs — buying overseas, Singapore Food Agency.
The four islands
Pick your Hawaii — four very different islands
Hawaii is four travel destinations, not one. Each island has its own personality and a different mix of beaches, terrain, lodging, and food. First-time visitors typically pick one or split two; trying to "do all four" in 10 days is the most common Singapore planning mistake — given how long the Singapore–Hawaii journey already is, you don't want inter-island flights eating another two days of your time.
Yes. Singapore is part of the U.S. Visa Waiver Program (since 1999), so every Singapore passport holder needs an approved ESTA before boarding the U.S.-bound leg of their trip. Apply at esta.cbp.dhs.gov at least 72 hours ahead. The fee is currently around US$40 (raised from US$21 on 30 September 2025 — confirm the exact amount on the official site before paying). Approval is valid for two years or until your passport expires, whichever comes first. Use the official .gov site only — many lookalike sites charge a markup for the same form. Permanent residents who are not Singapore citizens may need an ESTA or visa depending on their nationality.
Are there direct flights from Singapore to Hawaii?
Not consistently. Singapore Airlines flies SIN–LAX, SIN–SFO, and SIN–SEA direct on the trans-Pacific (the SIN–LAX route is one of the longest scheduled flights in the world at around 17–18 hours nonstop), which puts you a single short hop from Honolulu on Hawaiian Airlines, United, Delta, or American. The other common routing is SIN–NRT or SIN–HND on Singapore Airlines, JAL, or ANA (around 7 hours), then a separate trans-Pacific to HNL (around 7 hours on Hawaiian, JAL, or ANA) — total elapsed time of roughly 18 to 24 hours via either path. The Tokyo routing often beats the west-coast routing on price; the west-coast routing often beats it on flexibility (more frequent onward flights to HNL).
Will my Singapore health insurance cover me in Hawaii?
MediShield Life does not cover overseas medical treatment. Many Integrated Shield Plans (Singapore's private top-up layer above MediShield Life) include limited emergency overseas medical cover, but caps, conditions, and reimbursement rules vary by insurer and product — don't rely on it as a substitute for travel insurance. U.S. medical bills are routinely the highest in the world: an ER visit can run several thousand U.S. dollars, a hospital admission with imaging or surgery can hit five figures fast, and emergency medical evacuation back to Singapore from Hawaii can exceed S$150,000. Buy dedicated travel insurance before you fly. Singapore providers include AIG Travel Guard, NTUC Income, FWD, MSIG, Etiqa, and Allianz Travel — compare via PolicyPal, MoneySmart, or the Singapore brokerage of your choice. International comparison sites like SquareMouth and InsureMyTrip also list U.S.-rated policies.
What's the time difference between Singapore and Hawaii?
Singapore runs SGT (UTC+8) year-round with no daylight saving. Hawaii runs HST (UTC-10) year-round with no daylight saving. That puts Hawaii a fixed 18 hours behind Singapore — when it's 8 a.m. Tuesday in Singapore, it's 2 p.m. Monday in Honolulu. You essentially arrive in Hawaii on the previous calendar day, often before the time you left Changi. The outbound jet lag is significant; the trip home is often the rougher leg because you lose most of a day crossing the dateline.
Do I need a power adapter for Hawaii?
Yes — same adapter situation as UK travellers. Singapore uses 230V Type G plugs (the British-style three-pin square plug); the U.S. uses 110V Type A/B (flat two- or three-pin). You need a plug shape adapter for every device. Most modern phone chargers, laptop bricks, tablet chargers, and camera chargers are dual-voltage (the brick label will say 100-240V) — adapter alone is enough. Hair dryers, straighteners, and high-wattage heat appliances are often 230V-only and will burn out at 110V — use the hotel's or buy a cheap dual-voltage one for travel.
Will my Singapore driving licence work in Hawaii?
Mostly yes, but the lanes flip. Your Singapore driving licence is generally accepted in Hawaii for tourist driving, but Hawaii drives on the right — the opposite of home. An International Driving Permit (IDP) from the Automobile Association of Singapore (AAS, S$20) is not strictly required by Hawaii but is recommended and may be requested by some rental companies; it sits alongside (not instead of) your Singapore licence. Rental companies require a credit card (not debit) in the renter's name; many require drivers to be 21 or 25 minimum, with a young-driver surcharge for under-25s. Manual transmissions are extremely rare on U.S. rental fleets — expect an automatic by default. Take a moment in the rental lot before pulling out: right-side driving, left-hand-drive cars, intersections look different.
Will my Singapore credit card work in Hawaii?
Yes. Visa, Mastercard, and American Express are accepted nearly everywhere — restaurants, hotels, tours, rental cars, supermarkets. JCB has decent acceptance in Hawaii (Japanese tourist economy) but spottier on the U.S. mainland, so it's worth carrying a Visa or Mastercard alongside. NETS does not work in the U.S. Tap-to-pay and Apple Pay / Google Pay are standard. A card with no foreign transaction fee — YouTrip, Revolut Singapore, Wise, or the multi-currency tier of Standard Chartered / HSBC SG — saves you roughly 2–3% per transaction versus a standard Singapore credit card. Keep about S$150–250 worth of small U.S. bills (US$1, $5, $20) for tips, valets, parking attendants, and farmer's market stalls. Singapore-issued ATM cards on the Plus or Cirrus network generally work at U.S. ATMs.
When's the best time to fly from Singapore to Hawaii?
April to mid-May and September to mid-October are the two sweet-spot windows. Fares from Changi come off their peak, Hawaii's weather is at its most reliable, and crowds thin between Singaporean school holidays and U.S. school holidays. The Singapore November–December year-end school break (about six weeks) overlaps with peak U.S. travel demand and produces the most expensive fares of the year. The Singapore mid-year break (late May through end June) is high-priced because it overlaps with U.S. summer demand. The September one-week break and March one-week break sit in two of the best windows of the entire calendar — high value for short-leave SG families. Whale season (December through April) aligns well with the Singapore late-year holiday demand for warm-weather travel.
Partly cloudy on the windward side, mostly sunny on the leeward side. Trade winds are strong and will stay that way through Wednesday, bringing passing showers to windward slopes.
Surf builds this weekend—a south swell is coming in and could reach warning levels on south-facing beaches by Saturday and Sunday. Winds ease late Thursday, and you'll see more organized showers Friday through Saturday as a system moves nearby. Small Craft Advisory is up through Wednesday evening, so water's rough if you're thinking about boats.
Stick to leeward beaches and the sunny side through Wednesday. Save your snorkeling for after the weekend swell passes.
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Partly cloudy on the windward side, mostly sunny on the leeward side. Strong trade winds are pushing through, so it won't feel humid today.
Breezy conditions hold through Wednesday with scattered showers on the windward slopes. A bigger south swell starts building Friday and reaches warning levels by Saturday and Sunday on south-facing beaches. Winds ease late Thursday, and more organized showers are possible Friday through Saturday. North and west shores peak today before dropping off. Small Craft Advisory stays in effect through Wednesday evening.
Stick to leeward beaches and the sunny side through Wednesday. Save snorkeling and water activities for after the weekend swell passes.
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Voice
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Partly cloudy on the windward side, mostly sunny on the leeward side. Strong trade winds are pushing through, bringing scattered showers to the mountains and some afternoon showers to leeward areas. Low to mid 80s today, dropping to the low to mid 70s tonight.
Winds stay breezy through Wednesday. A south swell is building from a distant storm and will reach warning levels by Saturday and Sunday on south-facing beaches. North and west shores peak Wednesday then ease off. Expect more organized showers late Thursday through Saturday as a weather system moves nearby.
Get to the leeward beaches and sunny spots through Wednesday while conditions are stable. Save snorkeling and water activities for after the weekend swell passes.
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Voice
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Partly cloudy skies on the windward side, mostly sunny on the leeward side. Strong trade winds dominate through Wednesday, keeping the air less humid than usual and pushing temps to the low to mid 80s during the day, dropping to the low to mid 70s at night.
A south swell builds this weekend and reaches warning levels by Saturday and Sunday on south-facing beaches. North and west shores peak at moderate levels Wednesday before easing. Winds ease late Thursday as conditions become more unsettled, with organized showers possible Friday through Saturday. A Small Craft Advisory is in effect through Wednesday evening—boat conditions will be rough.
The leeward beaches and sunny spots stay your best bet through Wednesday. Plan snorkeling and calm-water activities after the weekend swell passes.
