How Long Is the Flight to Thailand?

Quick answer: the flight to Thailand (Bangkok) is about 17 h 26 min in the air from New York and 17 h 22 min from Los Angeles, non-stop; a connection adds its layover. Of the busiest US airports, Seattle is the closest at 15 h 44 min and Miami the farthest at 19 h 35 min. Flying home from Los Angeles is 1 h 8 min shorter.

Pick two airports. See the distance, about how long a non-stop flight takes, and what time it will be when you land.

JFK → LHR · non-stop

7 h 11 minAbout 7 h 11 min gate to gate for 3,442 miles (5,540 km). Most scheduled flights of this length: 6 h 56 min to 7 h 26 min.

Distance: 3,442 mi
Lands: pick a date and time

The flight back, westbound into the jet stream, is slower: about 7 h 48 min.
An estimate from the scheduled times of 5,797 US routes (US DOT, 2026-06): half of them are within 7 minutes of it. Your airline’s schedule is the real answer.

Airports from OurAirports, time zones from mwgg/Airports, flight times fitted on US DOT schedules. An estimate for a non-stop: check your airline.

The calculator above opens on New York to Bangkok: change either airport to yours, or add a date and a departure time for the local time you land. Below, the flight from each of the busiest US airports.

How long is the flight to Thailand from each US airport?

The FAA’s busiest US airports by passengers in 2024, the quickest first. Times are the estimated gate-to-gate time of a non-stop; the clock change is Thailand’s time minus the airport’s, in January and in July.

From	Distance	To Bangkok	Flight back	Clock change (Jan / Jul)
Seattle (SEA)	7,449 mi	15 h 44 min	14 h 49 min	+15 h / +14 h
San Francisco (SFO)	7,923 mi	16 h 43 min	15 h 37 min	+15 h / +14 h
Minneapolis (MSP)	8,297 mi	17 h 4 min	16 h 39 min	+13 h / +12 h
Boston (BOS)	8,529 mi	17 h 8 min	17 h 24 min	+12 h / +11 h
Los Angeles (LAX)	8,259 mi	17 h 22 min	16 h 14 min	+15 h / +14 h
Las Vegas (LAS)	8,277 mi	17 h 22 min	16 h 19 min	+15 h / +14 h
Detroit (DTW)	8,566 mi	17 h 25 min	17 h 17 min	+12 h / +11 h
New York JFK (JFK)	8,667 mi	17 h 26 min	17 h 38 min	+12 h / +11 h
Denver (DEN)	8,393 mi	17 h 27 min	16 h 40 min	+14 h / +13 h
Newark (EWR)	8,666 mi	17 h 27 min	17 h 37 min	+12 h / +11 h
Chicago O’Hare (ORD)	8,552 mi	17 h 29 min	17 h 12 min	+13 h / +12 h
Phoenix (PHX)	8,532 mi	17 h 51 min	16 h 48 min	+14 h / +14 h
Charlotte (CLT)	9,057 mi	18 h 20 min	18 h 16 min	+12 h / +11 h
Atlanta (ATL)	9,150 mi	18 h 35 min	18 h 23 min	+12 h / +11 h
Dallas-Fort Worth (DFW)	9,011 mi	18 h 35 min	17 h 53 min	+13 h / +12 h
Houston (IAH)	9,235 mi	19 h	18 h 19 min	+13 h / +12 h
Orlando (MCO)	9,524 mi	19 h 15 min	19 h 9 min	+12 h / +11 h
Fort Lauderdale (FLL)	9,690 mi	19 h 32 min	19 h 30 min	+12 h / +11 h
Miami (MIA)	9,708 mi	19 h 35 min	19 h 32 min	+12 h / +11 h

Every route are longer than any US route the estimate was measured on (4,983 miles), so treat those as a rough guide: the longer the flight, the more the wind moves it. LaGuardia, the 19th busiest, is left out: its flights are short-haul, and New York’s long flights leave from JFK and Newark.

Why the flight home is shorter

From Los Angeles the flight to Bangkok is about 17 h 22 min and the flight back 16 h 14 min. The difference is the jet stream, the band of west-to-east wind at cruising height: flying east you ride it, flying west you fly into it. The estimate carries that as a single measured effect of how far east a route goes, which is why the two directions of the same route differ.

What the clock says when you land

Thailand is 12 hours ahead of New York in January and 11 hours ahead of New York in July, when US clocks are on summer time; 15 hours ahead of Los Angeles in January and 14 hours ahead of Los Angeles in July. Leave Los Angeles at noon on Wednesday, July 15, and a non-stop would land in Bangkok at about 7:22 p.m. the next day, Thursday, local time.

Flying into another airport

This page measures to Bangkok (BKK). To Phuket (HKT) it is about 18 h 5 min from New York and 18 h 12 min from Los Angeles.

Is there a non-stop?

Not from every airport in the table: the times are what a non-stop would take, and a connection adds its layover. Your airline’s schedule says which airports fly to Thailand non-stop. For any pair of airports, the calculator above gives the distance and the time.

Plan it

FAQ

How long is the flight to Thailand?

About 17 h 26 min non-stop from New York and 17 h 22 min from Los Angeles. Of the busiest US airports, Seattle is the closest at 15 h 44 min and Miami the farthest at 19 h 35 min. All are estimates of a non-stop; a connection adds its layover.

How long is the flight to Thailand from New York?

About 17 h 26 min from JFK and 17 h 27 min from Newark, for 8,667 miles to Bangkok. The flight back to New York is 12 min longer: about 17 h 38 min.

How long is the flight to Thailand from Los Angeles?

About 17 h 22 min from LAX, and 16 h 43 min from San Francisco, for 8,259 miles. The flight back is 1 h 8 min shorter: about 16 h 14 min.

What is the time difference between Thailand and the US?

How these times are made

Distances are great circles between the airports (OurAirports). Times come from one line fitted to the median scheduled gate-to-gate time of 5,797 US routes (US DOT, 2026-06): a fixed allowance, a time per mile, and a correction for how far east the route goes. Half of those routes are within 7 minutes of it. The busiest airports are the FAA’s 2024 passenger boardings. Your airline’s schedule is the real answer: winds, routings and the season move it by a few minutes on a short flight and by more on a long one.