What is the cheapest airline that flies from Washington to Thailand?

Singapore Airlines, Korean Air, and United Airlines are the most popular carriers operating from Washington to Thailand

How long is the flight from State of Washington to Thailand?

The flight from State of Washington to Thailand depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Seattle (a popular airport in State of Washington) to Bangkok Suvarnabhumi Airport (the most popular airport in Thailand), then the flight time is 19h 45m on average. If you fly from Spokane (another popular airport in State of Washington) to Bangkok Suvarnabhumi Airport, then the average flight time is 22h 21m.

What airlines fly to Thailand?

EVA Air, Asiana Airlines and Singapore Airlines are the top three most popular airlines that fly to Thailand from State of Washington according to our data. EVA Air is the first choice among our users, with 30% of people opting to fly with this airline when traveling to Thailand. Keep in mind that there are 17 different airlines that fly to Thailand on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Washington to Thailand?

Prices for flights from Washington to Thailand are updated daily.

How many operators does momondo search for flights from Washington to Thailand?

There are 17 operators available for flights from Washington to Thailand as of February 2026.

How old do you have to be to fly from Washington to Thailand?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Thailand.

What documentation or ID do you need to fly to Thailand?

The travel and health documents required for your trip to Thailand can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Thailand. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$271 Cheap Flights from Washington to Thailand in 2026

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Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:15 am - 10:50 am

SEA

HKT

34h 35m

1 stop

9:25 am - 8:45 am

HKT

SEA

37h 20m

1 stop

$498Singapore Airlines

Sat, Apr 18 - Thu, Apr 23

10:15 am - 8:35 am

SEA

HKT

32h 20m

1 stop

9:25 am - 8:45 am

HKT

SEA

37h 20m

1 stop

$504Singapore Airlines

Sat, Apr 18 - Thu, Apr 23

12:10 am - 11:15 am

SEA

BKK

21h 05m

1 stop

1:20 am - 2:55 pm

BKK

SEA

27h 35m

1 stop

$642Asiana Airlines

Sun, Mar 8 - Sun, May 31

12:55 am - 11:20 pm

SEA

BKK

32h 25m

1 stop

1:20 am - 2:55 pm

BKK

SEA

27h 35m

1 stop

$651Asiana Airlines

Thu, Apr 23 - Sat, May 2

1:15 am - 10:20 am

SEA

CNX

19h 05m

1 stop

11:20 am - 7:45 pm

CNX

SEA

22h 25m

1 stop

$729China Airlines

Sun, Mar 29 - Mon, Aug 31

11:45 am - 9:45 am

SEA

CNX

32h 00m

1 stop

10:30 am - 10:05 am

CNX

SEA

37h 35m

1 stop

$754Cathay Pacific

Wed, Apr 22 - Fri, May 22

11:45 am - 9:45 am

SEA

CNX

32h 00m

1 stop

7:25 pm - 10:05 am

CNX

SEA

28h 40m

1 stop

$780Cathay Pacific

Mon, Apr 6 - Mon, Apr 13

7:43 pm - 12:00 pm

GEG

BKK

26h 17m

2 stops

1:10 pm - 9:31 pm

BKK

GEG

22h 21m

2 stops

$784STARLUX Airlines

Tue, Apr 21 - Wed, May 6

7:41 pm - 12:00 pm

GEG

BKK

26h 19m

2 stops

5:50 pm - 9:31 pm

BKK

GEG

41h 41m

2 stops

$808STARLUX Airlines

Wed, Apr 22 - Tue, May 5

10:45 am - 9:45 am

PDX

BKK

33h 00m

2 stops

5:30 pm - 8:02 am

BKK

PDX

28h 32m

2 stops

$838China Airlines

Sat, May 9 - Mon, May 25

STARLUX Airlines flights from State of Washington to Thailand

Our best STARLUX Airlines deals on State of Washington to Thailand flight tickets

STARLUX Airlines

Mar 1

SEA11:45 pmSeattle/Tacoma Intl

21h 50m

1 stop

BKK12:35 pmBangkok Suvarnabhumi

Mar 8

BKK1:45 pmBangkok Suvarnabhumi

16h 20m

1 stop

SEA3:05 pmSeattle/Tacoma Intl

$781

STARLUX Airlines

Apr 21

GEG7:43 pmSpokane

26h 17m

2 stops

BKK12:00 pmBangkok Suvarnabhumi

May 6

BKK1:10 pmBangkok Suvarnabhumi

22h 21m

2 stops

GEG9:31 pmSpokane

$784

STARLUX Airlines

Mar 4

SEA11:45 pmSeattle/Tacoma Intl

25h 45m

1 stop

BKK4:30 pmBangkok Suvarnabhumi

Mar 14

BKK1:45 pmBangkok Suvarnabhumi

16h 20m

1 stop

SEA4:05 pmSeattle/Tacoma Intl

$785

Korean Air flights from State of Washington to Thailand

Our best Korean Air deals on State of Washington to Thailand flight tickets

Korean Air

Apr 14

SEA12:50 pmSeattle/Tacoma Intl

20h 45m

1 stop

BKK11:35 pmBangkok Suvarnabhumi

Apr 23

BKK11:30 pmBangkok Suvarnabhumi

29h 21m

2 stops

SEA2:51 pmSeattle/Tacoma Intl

$685

Korean Air

Mar 3

SEA11:00 amSeattle/Tacoma Intl

22h 55m

1 stop

BKK12:55 amBangkok Suvarnabhumi

Mar 10

BKK9:30 pmBangkok Suvarnabhumi

26h 30m

1 stop

SEA10:00 amSeattle/Tacoma Intl

$701

Korean Air

Mar 3

SEA7:10 amSeattle/Tacoma Intl

47h 20m

2 stops

BKK9:30 pmBangkok Suvarnabhumi

Mar 10

BKK9:30 pmBangkok Suvarnabhumi

26h 30m

1 stop

SEA10:00 amSeattle/Tacoma Intl

$707

Fly from

Fly to

Route

Depart

Return

Price

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sat 4/18

10:15 am-10:50 am

1 stop34h 35m

Phuket City

Thu 4/23

9:25 am-8:45 am

1 stop37h 20m

$498

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sat 4/18

10:15 am-8:35 am

1 stop32h 20m

Phuket City

Thu 4/23

9:25 am-8:45 am

1 stop37h 20m

$504

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 3/8

12:10 am-11:15 am

1 stop21h 05m

Bangkok Suvarnabhumi

Sun 5/31

1:20 am-2:55 pm

1 stop27h 35m

$642

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 4/23

12:55 am-11:20 pm

1 stop32h 25m

Bangkok Suvarnabhumi

Sat 5/2

1:20 am-2:55 pm

1 stop27h 35m

$651

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 3/29

1:15 am-10:20 am

1 stop19h 05m

Chiang Mai

Mon 8/31

11:20 am-7:45 pm

1 stop22h 25m

$729

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Wed 4/22

11:45 am-9:45 am

1 stop32h 00m

Chiang Mai

Fri 5/22

10:30 am-10:05 am

1 stop37h 35m

$754

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 4/6

11:45 am-9:45 am

1 stop32h 00m

Chiang Mai

Mon 4/13

7:25 pm-10:05 am

1 stop28h 40m

$780

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Tue 4/21

7:43 pm-12:00 pm

2 stops26h 17m

Bangkok Suvarnabhumi

Wed 5/6

1:10 pm-9:31 pm

2 stops22h 21m

$784

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Wed 4/22

7:41 pm-12:00 pm

2 stops26h 19m

Bangkok Suvarnabhumi

Tue 5/5

5:50 pm-9:31 pm

2 stops41h 41m

$808

PortlandBangkok

PDX - BKK

PDXBKK

Portland

Sat 5/9

10:45 am-9:45 am

2 stops33h 00m

Bangkok Suvarnabhumi

Mon 5/25

5:30 pm-8:02 am

2 stops28h 32m

$838

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from State of Washington to Thailand

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Thailand?

The month of September is, on average, the cheapest month to fly to Thailand from State of Washington, with most prices found around $748. If you are unable to visit Thailand during the month of September, then departing from State of Washington during the month February is also very affordable. Most momondo users find prices during this month for around $762.

How far in advance should I book a flight to Thailand?

You are more likely to see cheaper flights to Thailand from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Thailand for around $874 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Thailand from State of Washington for as low as $715 on momondo.

Can stopping save me money on State of Washington to Thailand flights?

You could potentially save up to 47% on your flight if you consider stops on a State of Washington to Thailand flight.

Cheap State of Washington to Thailand flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Thailand

Fastest flight time	18h 35m
Direct flights	None

The fastest flight from State of Washington to Thailand takes 18h 35m

There are no direct flights from State of Washington to Thailand. There are no popular flight routes from State of Washington to Thailand.

Search flight deals

When did momondo last update prices for flights from Washington to Thailand?
Prices for flights from Washington to Thailand are updated daily.
How many operators does momondo search for flights from Washington to Thailand?
There are 17 operators available for flights from Washington to Thailand as of February 2026.
How old do you have to be to fly from Washington to Thailand?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Thailand.
What documentation or ID do you need to fly to Thailand?
The travel and health documents required for your trip to Thailand can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Thailand. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from State of Washington to Thailand

Compare and see reviews for airlines that fly from State of Washington to Thailand with momondo

Airline	Rating	Free Cancellation	Price
Philippine Airlines	PriceFrom $154	Free Cancellation	Rating 7.2 958 reviews	Search Philippine Airlines flights
Korean Air	PriceFrom $418	Free Cancellation	Rating 8.4 1,195 reviews	Search Korean Air flights
Singapore Airlines	PriceFrom $510	Free Cancellation	Rating 8.2 1,463 reviews	Search Singapore Airlines flights
Delta	PriceFrom $544	Free Cancellation	Rating 7.9 8,239 reviews	Search Delta flights
Asiana Airlines	PriceFrom $626	Free Cancellation	Rating 8.1 502 reviews	Search Asiana Airlines flights
ANA	PriceFrom $683	Free Cancellation	Rating 8.4 1,100 reviews	Search ANA flights
United Airlines	PriceFrom $700	Free Cancellation	Rating 7.4 9,344 reviews	Search United Airlines flights
China Airlines	PriceFrom $730	Free Cancellation	Rating 8.3 807 reviews	Search China Airlines flights
Cathay Pacific	PriceFrom $735	Free Cancellation	Rating 7.6 1,179 reviews	Search Cathay Pacific flights
STARLUX Airlines	PriceFrom $740	Free Cancellation	Rating 8.9 274 reviews	Search STARLUX Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Thailand?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington to Thailand. momondo saves you time and could save you money on your trip.

Can I find flights from Washington to Thailand with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Thailand from Washington with this policy.

How can momondo help me find flights from Washington to Thailand?

momondo helps you find the best flight between Washington and Thailand by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Washington to Thailand right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington to Thailand now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Thailand and let you know when they change.

An easier way to manage your Thailand trip

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Feeling lucky

Popular cities in Thailand

Flights to Bangkokfrom $474

Flights to Phuket Cityfrom $498

Flights to Chiang Maifrom $666

Flights to Ko Samuifrom $712

Flights to Krabifrom $827

Flights to Surat Thanifrom $678

Flights to Chiang Raifrom $888

Flights to Udon Thanifrom $884

Flights to Hat Yaifrom $1,247

Flights to Khon Kaenfrom $1,029

Flights to Ubon Ratchathanifrom $918

Flights to Tratfrom $955

Cheap flights from Washington to Thailand from $271

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Thailand departing on 4/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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STARLUX Airlines flights from State of Washington to Thailand

Our best STARLUX Airlines deals on State of Washington to Thailand flight tickets

Korean Air flights from State of Washington to Thailand

Our best Korean Air deals on State of Washington to Thailand flight tickets

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See travel insights to Thailand from

How to get the cheapest flight ticket from State of Washington to Thailand

What is the cheapest month to fly to Thailand?

How far in advance should I book a flight to Thailand?

Can stopping save me money on State of Washington to Thailand flights?

What is the cheapest airline that flies from Washington to Thailand?

What airlines fly to Thailand?

How long is the flight from State of Washington to Thailand?

Cheap State of Washington to Thailand flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Thailand

Fastest flight time

Direct flights

Best airlines flying from State of Washington to Thailand

Compare and see reviews for airlines that fly from State of Washington to Thailand with momondo

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Thailand?

Can I find flights from Washington to Thailand with flexible booking policies on momondo?

How can momondo help me find flights from Washington to Thailand?

I’m not ready to book a flight from Washington to Thailand right now. Can momondo alert me if prices change?

An easier way to manage your Thailand trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Thailand

Popular cities in Thailand

Popular flights according to clicks in the last 7 days on momondo

State of Washington flight routes

According to popular flight searches on momondo this year

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According to popular flight searches on momondo this year

Fly your favorite airline to Thailand

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Thailand

List of cabin classes available on flights landing in Thailand. Availability may vary depending on flight origin and airline.

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According to popular flight searches on momondo this year