What airlines fly to Thailand?

Singapore Airlines, EVA Air and Asiana Airlines are the top three most popular airlines that fly to Thailand from State of Washington according to our data. Singapore Airlines is the first choice among our users, with 33% 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.

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 20m on average. If you fly from Spokane (another popular airport in State of Washington) to Bangkok Suvarnabhumi Airport, then the average flight time is 26h 47m.

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

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

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 November 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.

$282 Cheap Flights from Washington to Thailand in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington to Thailand

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:15 am - 7:15 pmSEA Seattle/Tacoma Intl-HKT Phuket City

19h 00m1 stop Singapore Changi

8:10 pm - 8:45 amHKT Phuket City-SEA Seattle/Tacoma Intl

26h 35m1 stop Singapore Changi

$602Singapore Airlines

Tue, Mar 30 - Wed, Apr 14

9:40 am - 7:50 amSEA Seattle/Tacoma Intl-HKT Phuket City

32h 10m1 stop Singapore Changi

2:45 pm - 8:05 amHKT Phuket City-SEA Seattle/Tacoma Intl

31h 20m1 stop Singapore Changi

$636Singapore Airlines

Fri, Mar 19 - Fri, Mar 26

9:30 pm - 10:45 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

34h 15m1 stop Manila Ninoy Aquino Intl

11:40 pm - 6:45 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

34h 05m1 stop Manila Ninoy Aquino Intl

$782Philippine Airlines

Thu, Feb 18 - Wed, Mar 10

9:30 pm - 12:05 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

23h 35m1 stop Manila Ninoy Aquino Intl

9:55 am - 6:45 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

23h 50m1 stop Manila Ninoy Aquino Intl

$782Philippine Airlines

Mon, Feb 8 - Thu, Feb 18

10:05 am - 10:40 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

33h 35m1 stop Chongqing Jiangbei Intl

11:50 am - 8:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

35h 15m1 stop Chongqing Jiangbei Intl

$788Hainan Airlines

Thu, Jan 21 - Wed, Feb 3

10:20 am - 11:35 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

22h 15m1 stop Beijing Capital

1:05 am - 8:20 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

22h 15m1 stop Beijing Capital

$788Hainan Airlines

Tue, Dec 1 - Mon, Dec 14

8:40 am - 12:10 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

36h 30m1 stop Singapore Changi

7:30 pm - 8:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

27h 35m2 stops Haikou Meilan Intl Chongqing Jiangbei Intl

$802Multiple Airlines

Wed, Jan 20 - Wed, Jan 27

8:40 am - 8:25 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

32h 45m1 stop Singapore Changi

11:50 am - 8:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

35h 15m1 stop Chongqing Jiangbei Intl

$803Multiple Airlines

Fri, Mar 5 - Wed, Mar 10

11:00 am - 12:20 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

22h 20m1 stop Incheon Intl

11:15 pm - 9:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

24h 50m1 stop Incheon Intl

$846Korean Air

Thu, Jan 14 - Sun, Jan 31

12:10 am - 10:45 pmSEA Seattle/Tacoma Intl-CNX Chiang Mai

31h 35m1 stop Incheon Intl

12:20 am - 2:10 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

28h 50m1 stop Incheon Intl

$872Korean Air

Wed, Jan 27 - Sun, Feb 14

Cheap last minute flights

Enter your travel dates to find the best prices.

9:30 pm - 6:45 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

30h 15m1 stop Manila Ninoy Aquino Intl

9:55 am - 6:45 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

23h 50m1 stop Manila Ninoy Aquino Intl

$782Philippine Airlines

Mon, Nov 9 - Wed, Nov 25

9:30 pm - 6:45 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

30h 15m1 stop Manila Ninoy Aquino Intl

9:55 am - 6:45 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

23h 50m1 stop Manila Ninoy Aquino Intl

$788Philippine Airlines

Mon, Nov 9 - Wed, Nov 25

10:05 am - 10:40 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

33h 35m1 stop Chongqing Jiangbei Intl

12:45 am - 8:20 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

22h 35m1 stop Beijing Capital

$788Hainan Airlines

Thu, Nov 12 - Fri, Nov 20

10:20 am - 2:20 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

37h 00m1 stop Beijing Capital

7:30 pm - 8:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

27h 35m2 stops Haikou Meilan Intl Chongqing Jiangbei Intl

$788Hainan Airlines

Tue, Nov 10 - Wed, Nov 25

8:40 am - 10:05 amSEA Seattle/Tacoma Intl-HKT Phuket City

34h 25m1 stop Singapore Changi

10:05 am - 7:05 amHKT Phuket City-SEA Seattle/Tacoma Intl

36h 00m1 stop Singapore Changi

$805Singapore Airlines

Tue, Nov 10 - Tue, Nov 17

8:40 am - 7:35 pmSEA Seattle/Tacoma Intl-HKT Phuket City

19h 55m1 stop Singapore Changi

10:05 am - 7:05 amHKT Phuket City-SEA Seattle/Tacoma Intl

36h 00m1 stop Singapore Changi

$832Singapore Airlines

Wed, Nov 11 - Thu, Nov 19

10:20 am - 2:20 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

37h 00m1 stop Beijing Capital

1:05 am - 9:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

23h 00m1 stop Incheon Intl

$876Multiple Airlines

Tue, Nov 10 - Wed, Dec 9

10:25 am - 3:55 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

38h 30m1 stop Hong Kong Intl

11:45 am - 8:45 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

36h 00m1 stop Hong Kong Intl

$880Cathay Pacific

Thu, Nov 12 - Wed, Dec 9

9:30 pm - 12:05 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

23h 35m1 stop Manila Ninoy Aquino Intl

7:30 pm - 8:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

27h 35m2 stops Haikou Meilan Intl Chongqing Jiangbei Intl

$902Multiple Airlines

Mon, Nov 9 - Wed, Nov 25

10:25 am - 11:20 amSEA Seattle/Tacoma Intl-HKT Phuket City

33h 55m1 stop Hong Kong Intl

12:20 pm - 8:45 amHKT Phuket City-SEA Seattle/Tacoma Intl

35h 25m1 stop Hong Kong Intl

$949Cathay Pacific

Mon, Nov 9 - Mon, Dec 7

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China Eastern flights from State of Washington to Thailand

Our best China Eastern deals on State of Washington to Thailand flight tickets

China Eastern

Nov 12

GEG7:00 amSpokane

27h 55m

2 stops

BKK1:55 amBangkok Suvarnabhumi

Nov 22

BKK7:55 pmBangkok Suvarnabhumi

34h 50m

2 stops

GEG3:45 pmSpokane

$995

China Eastern

Jan 13

GEG6:52 amSpokane

43h 58m

2 stops

BKK5:50 pmBangkok Suvarnabhumi

Mar 31

BKK1:35 pmBangkok Suvarnabhumi

46h 02m

2 stops

GEG9:37 pmSpokane

$1,001

China Eastern

Apr 4

GEG6:30 amSpokane

28h 10m

2 stops

BKK12:40 amBangkok Suvarnabhumi

Apr 18

BKK2:10 amBangkok Suvarnabhumi

33h 27m

2 stops

GEG9:37 pmSpokane

$1,002

Singapore Airlines flights from State of Washington to Thailand

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

Singapore Airlines

Mar 30

SEA10:15 amSeattle/Tacoma Intl

19h 00m

1 stop

HKT7:15 pmPhuket City

Apr 14

HKT8:10 pmPhuket City

26h 35m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$602

Singapore Airlines

Feb 26

SEA8:40 amSeattle/Tacoma Intl

19h 55m

1 stop

HKT7:35 pmPhuket City

Mar 12

HKT8:25 pmPhuket City

25h 40m

1 stop

SEA7:05 amSeattle/Tacoma Intl

$636

Singapore Airlines

Mar 17

SEA9:40 amSeattle/Tacoma Intl

34h 25m

1 stop

HKT10:05 amPhuket City

Mar 26

HKT2:45 pmPhuket City

31h 20m

1 stop

SEA8:05 amSeattle/Tacoma Intl

$639

momondo Fare Finder

Use the filters below to find and compare flights from Washington to Thailand that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattlePhuket City

SEA Seattle/Tacoma Intl - HKT Phuket City

SEAHKT

Seattle/Tacoma Intl

Tue 3/30

10:15 am-7:15 pm

1 stop19h 00m

Phuket City

Wed 4/14

8:10 pm-8:45 am

1 stop26h 35m

$602

SeattlePhuket City

SEA Seattle/Tacoma Intl - HKT Phuket City

SEAHKT

Seattle/Tacoma Intl

Fri 3/19

9:40 am-7:50 am

1 stop32h 10m

Phuket City

Fri 3/26

2:45 pm-8:05 am

1 stop31h 20m

$636

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 2/18

9:30 pm-10:45 pm

1 stop34h 15m

Bangkok Suvarnabhumi

Wed 3/10

11:40 pm-6:45 pm

1 stop34h 05m

$782

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 2/8

9:30 pm-12:05 pm

1 stop23h 35m

Bangkok Suvarnabhumi

Thu 2/18

9:55 am-6:45 pm

1 stop23h 50m

$782

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 1/21

10:05 am-10:40 am

1 stop33h 35m

Bangkok Suvarnabhumi

Wed 2/3

11:50 am-8:05 am

1 stop35h 15m

$788

Quickest round-trip

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 12/1

10:20 am-11:35 pm

1 stop22h 15m

Bangkok Suvarnabhumi

Mon 12/14

1:05 am-8:20 am

1 stop22h 15m

$788

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Wed 1/20

8:40 am-12:10 pm

1 stop36h 30m

Bangkok Suvarnabhumi

Wed 1/27

7:30 pm-8:05 am

2 stops27h 35m

$802

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Fri 3/5

8:40 am-8:25 am

1 stop32h 45m

Bangkok Suvarnabhumi

Wed 3/10

11:50 am-8:05 am

1 stop35h 15m

$803

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 1/14

11:00 am-12:20 am

1 stop22h 20m

Bangkok Suvarnabhumi

Sun 1/31

11:15 pm-9:05 am

1 stop24h 50m

$846

SeattleChiang Mai

SEA Seattle/Tacoma Intl - CNX Chiang Mai

SEACNX

Seattle/Tacoma Intl

Wed 1/27

12:10 am-10:45 pm

1 stop31h 35m

Chiang Mai

Sun 2/14

12:20 am-2:10 pm

1 stop28h 50m

$872

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 March is, on average, the cheapest month to fly to Thailand from State of Washington, with most prices found around $763. If you are unable to visit Thailand during the month of March, then departing from State of Washington during the month April is also very affordable. Most momondo users find prices during this month for around $789.

How far in advance should I book a flight from Washington 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 $911 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 $819 on momondo.

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

You could potentially save up to 32% 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

Best Price Found	$282
Fastest flight time	19h 00m
Direct flights	None

The best one-way flight to Thailand from State of Washington in the past 72 hours is $282. The best round-trip flight deal from State of Washington to Thailand found on momondo in the last 72 hours is $602.

The fastest flight from State of Washington to Thailand takes 19h 00m

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

Frequently asked questions about flying from Washington to Thailand

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 November 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 $149	Free Cancellation	Rating 7.3 1,040 reviews	Search Philippine Airlines flights
Hainan Airlines	PriceFrom $385	Free Cancellation	Rating 8.4 73 reviews	Search Hainan Airlines flights
Air Canada	PriceFrom $428	Free Cancellation	Rating 7.1 11,876 reviews	Search Air Canada flights
Delta	PriceFrom $459	Free Cancellation	Rating 7.8 8,699 reviews	Search Delta flights
Singapore Airlines	PriceFrom $512	Free Cancellation	Rating 8.2 1,632 reviews	Search Singapore Airlines flights
Qatar Airways	PriceFrom $577	Free Cancellation	Rating 7.4 3,707 reviews	Search Qatar Airways flights
Asiana Airlines	PriceFrom $633	Free Cancellation	Rating 8.1 570 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $655	Free Cancellation	Rating 8.4 1,218 reviews	Search Korean Air flights
ANA	PriceFrom $699	Free Cancellation	Rating 8.3 1,339 reviews	Search ANA flights
United Airlines	PriceFrom $702	Free Cancellation	Rating 7.3 10,472 reviews	Search United 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.