What airlines fly to Thailand?

EVA Air, Asiana Airlines and China 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 31% 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 20h 05m on average. If you fly from Spokane (another popular airport in State of Washington) to Bangkok Suvarnabhumi Airport, then the average flight time is 23h 23m.

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

Singapore Airlines, Hainan Airlines, and Japan Airlines 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 December 2025.

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.

$307 Cheap Flights from Washington to Thailand in 2025/26

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One-way

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Cheap round-trip flights

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8:45 am - 6:45 pm

SEA

BKK

43h 00m1 stop

8:00 pm - 1:55 pm

BKK

SEA

31h 55m2 stops

$666Multiple Airlines

Sun, Mar 1 - Tue, Mar 10

10:05 am - 10:40 am

SEA

BKK

33h 35m1 stop

11:50 am - 8:05 am

BKK

SEA

35h 15m1 stop

$680Hainan Airlines

Thu, Jan 22 - Wed, Feb 4

8:45 am - 8:00 pm

SEA

BKK

20h 15m1 stop

9:10 pm - 7:10 am

BKK

SEA

25h 00m1 stop

$681Singapore Airlines

Fri, Jan 30 - Mon, Feb 9

9:30 pm - 11:00 pm

SEA

BKK

34h 30m1 stop

1:25 pm - 8:05 pm

BKK

SEA

20h 40m1 stop

$682Philippine Airlines

Thu, Feb 26 - Tue, Mar 31

8:45 am - 2:35 pm

SEA

BKK

38h 50m1 stop

3:30 pm - 10:56 am

BKK

SEA

33h 26m2 stops

$683Multiple Airlines

Sun, Mar 1 - Tue, Mar 31

12:10 am - 9:50 am

SEA

BKK

18h 40m1 stop

5:50 pm - 6:10 pm

BKK

SEA

15h 20m1 stop

$692China Airlines

Tue, Jan 13 - Mon, Feb 2

12:10 am - 11:15 am

SEA

BKK

21h 05m1 stop

12:20 pm - 2:55 pm

BKK

SEA

16h 35m1 stop

$696Asiana Airlines

Mon, Mar 9 - Tue, Mar 31

12:10 am - 9:35 pm

SEA

HKT

30h 25m1 stop

10:15 pm - 2:55 pm

HKT

SEA

30h 40m1 stop

$711Asiana Airlines

Sun, Mar 1 - Mon, Mar 30

1:10 am - 10:25 am

SEA

CNX

19h 15m1 stop

11:25 am - 7:10 pm

CNX

SEA

21h 45m1 stop

$759China Airlines

Mon, Mar 9 - Tue, Mar 17

9:19 pm - 8:00 pm

PDX

BKK

31h 41m2 stops

12:00 pm - 8:35 am

BKK

PDX

35h 35m2 stops

$786Singapore Airlines

Wed, Feb 25 - Sun, Mar 8

Philippine Airlines flights from State of Washington to Thailand

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

Philippine Airlines

Feb 26

SEA9:30 pmSeattle/Tacoma Intl

34h 30m

1 stop

BKK11:00 pmBangkok Suvarnabhumi

Mar 31

BKK1:25 pmBangkok Suvarnabhumi

20h 40m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$682

Find similar

Philippine Airlines

Feb 27

SEA9:30 pmSeattle/Tacoma Intl

23h 30m

1 stop

BKK12:00 pmBangkok Suvarnabhumi

Mar 31

BKK1:25 pmBangkok Suvarnabhumi

20h 40m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$702

Find similar

Philippine Airlines

Feb 27

SEA9:30 pmSeattle/Tacoma Intl

34h 30m

1 stop

BKK11:00 pmBangkok Suvarnabhumi

Mar 31

BKK1:25 pmBangkok Suvarnabhumi

20h 40m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$704

Find similar

United Airlines flights from State of Washington to Thailand

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

United Airlines

Mar 3

SEA3:45 pmSeattle/Tacoma Intl

22h 25m

1 stop

BKK5:10 amBangkok Suvarnabhumi

Mar 29

BKK9:35 amBangkok Suvarnabhumi

18h 50m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$701

Find similar

United Airlines

May 6

SEA7:37 pmSeattle/Tacoma Intl

42h 58m

2 stops

BKK4:35 amBangkok Suvarnabhumi

May 13

BKK9:35 amBangkok Suvarnabhumi

18h 50m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$705

Find similar

United Airlines

May 7

SEA4:30 pmSeattle/Tacoma Intl

22h 05m

1 stop

BKK4:35 amBangkok Suvarnabhumi

May 19

BKK9:35 amBangkok Suvarnabhumi

46h 59m

2 stops

SEA6:34 pmSeattle/Tacoma Intl

$711

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 3/1

8:45 am-6:45 pm

1 stop43h 00m

Bangkok Suvarnabhumi

Tue 3/10

8:00 pm-1:55 pm

2 stops31h 55m

$666

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 1/22

10:05 am-10:40 am

1 stop33h 35m

Bangkok Suvarnabhumi

Wed 2/4

11:50 am-8:05 am

1 stop35h 15m

$680

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 1/30

8:45 am-8:00 pm

1 stop20h 15m

Bangkok Suvarnabhumi

Mon 2/9

9:10 pm-7:10 am

1 stop25h 00m

$681

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 2/26

9:30 pm-11:00 pm

1 stop34h 30m

Bangkok Suvarnabhumi

Tue 3/31

1:25 pm-8:05 pm

1 stop20h 40m

$682

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 3/1

8:45 am-2:35 pm

1 stop38h 50m

Bangkok Suvarnabhumi

Tue 3/31

3:30 pm-10:56 am

2 stops33h 26m

$683

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 1/13

12:10 am-9:50 am

1 stop18h 40m

Bangkok Suvarnabhumi

Mon 2/2

5:50 pm-6:10 pm

1 stop15h 20m

$692

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 3/9

12:10 am-11:15 am

1 stop21h 05m

Bangkok Suvarnabhumi

Tue 3/31

12:20 pm-2:55 pm

1 stop16h 35m

$696

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sun 3/1

12:10 am-9:35 pm

1 stop30h 25m

Phuket City

Mon 3/30

10:15 pm-2:55 pm

1 stop30h 40m

$711

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 3/9

1:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Tue 3/17

11:25 am-7:10 pm

1 stop21h 45m

$759

PortlandBangkok

PDX - BKK

PDXBKK

Portland

Wed 2/25

9:19 pm-8:00 pm

2 stops31h 41m

Bangkok Suvarnabhumi

Sun 3/8

12:00 pm-8:35 am

2 stops35h 35m

$786

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 $751. 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 $759.

What is the cheapest day to depart on your flight to Thailand?

The cheapest day to depart on your flight to Thailand is on a Tuesday when prices can be found for as low as $931. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Thailand is Friday, with ticket prices averaging around $1,111.

What is the cheapest time of day to depart on your flight to Thailand?

Flying to Thailand from State of Washington in the morning is the least expensive time of day to depart. momondo users have found prices as low as $986 when looking at flights departing in the morning. In contrast, the most expensive time of day to depart to Thailand is at noon when prices are around $1,081.

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 $894 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 $750 on momondo.

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

You could potentially save up to 38% 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	19h 05m
Direct flights	None

The fastest flight from State of Washington to Thailand takes 19h 05m

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 December 2025.
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
Delta	PriceFrom $433	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta flights
Singapore Airlines	PriceFrom $520	Free Cancellation	Rating 8.1 1,412 reviews	Search Singapore Airlines flights
Philippine Airlines	PriceFrom $605	Free Cancellation	Rating 7.3 941 reviews	Search Philippine Airlines flights
Asiana Airlines	PriceFrom $612	Free Cancellation	Rating 8.2 492 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $679	Free Cancellation	Rating 8.4 1,184 reviews	Search Korean Air flights
ANA	PriceFrom $695	Free Cancellation	Rating 8.4 1,021 reviews	Search ANA flights
China Airlines	PriceFrom $730	Free Cancellation	Rating 8.2 788 reviews	Search China Airlines flights
Cathay Pacific	PriceFrom $735	Free Cancellation	Rating 7.6 1,095 reviews	Search Cathay Pacific flights
STARLUX Airlines	PriceFrom $740	Free Cancellation	Rating 8.9 243 reviews	Search STARLUX Airlines flights
United Airlines	PriceFrom $753	Free Cancellation	Rating 7.4 9,094 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.

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.

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Find better results for your trip to Thailand

Popular cities in Thailand

Flights to Bangkokfrom $524

Flights to Phuket Cityfrom $582

Flights to Chiang Maifrom $647

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Flights to Krabifrom $864

Flights to Surat Thanifrom $812

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Flights to Hat Yaifrom $1,229

Flights to Khon Kaenfrom $979

Flights to Ubon Ratchathanifrom $1,244

Flights to Tratfrom $889

Cheap flights from Washington to Thailand from $307

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 1/27. 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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Filter for what you want

Filter for what you want

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Philippine Airlines flights from State of Washington to Thailand

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

United Airlines flights from State of Washington to Thailand

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

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

What is the cheapest month to fly to Thailand?

What is the cheapest day to depart on your flight to Thailand?

The cheapest day to depart on your flight to Thailand is on a Tuesday when prices can be found for as low as $931. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Thailand is Friday, with ticket prices averaging around $1,111.

What is the cheapest time of day to depart on your flight 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?

You could potentially save up to 38% on your flight if you consider stops on a State of Washington to Thailand flight.

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

Singapore Airlines, Hainan Airlines, and Japan Airlines are the most popular carriers operating 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

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

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

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

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

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