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

Singapore Airlines, Asiana Airlines, and ANA are the most popular carriers operating from Washington to Thailand

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 18h 40m 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 15m.

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 18 operators available for flights from Washington to Thailand as of August 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.

$283 Cheap Flights from Washington to Thailand in 2025

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Washington to Thailand

Round-trip

One-way

Last minute

Cheap round-trip flights

8:45 am - 6:45 pmSEA-BKK

43h 00m1 stop

3:40 pm - 7:10 amBKK-SEA

30h 30m1 stop

$511Singapore Airlines

Find Deal

mar., feb. 3 - mié., feb. 11

8:45 am - 8:30 amSEA-BKK

32h 45m1 stop

8:00 pm - 7:10 amBKK-SEA

26h 10m1 stop

$512Singapore Airlines

Find Deal

dom., ene. 18 - jue., feb. 5

8:45 am - 8:00 pmSEA-BKK

20h 15m1 stop

3:40 pm - 7:10 amBKK-SEA

30h 30m1 stop

$513Singapore Airlines

Find Deal

dom., feb. 1 - sáb., feb. 7

9:30 pm - 5:50 pmSEA-BKK

29h 20m1 stop

11:35 pm - 6:35 pmBKK-SEA

34h 00m1 stop

$580Philippine Airlines

Find Deal

mié., feb. 4 - mié., feb. 25

12:10 am - 11:15 amSEA-BKK

20h 05m1 stop

12:20 pm - 1:55 pmBKK-SEA

16h 35m1 stop

$638Asiana Airlines

Find Deal

lun., feb. 2 - mié., feb. 11

12:10 am - 11:15 amSEA-BKK

20h 05m1 stop

12:20 pm - 1:55 pmBKK-SEA

16h 35m1 stop

$641Asiana Airlines

Find Deal

lun., feb. 2 - mié., feb. 11

10:00 am - 6:00 amSEA-BKK

30h 00m2 stops

9:35 am - 2:25 pmBKK-SEA

18h 50m1 stop

$674ANA

Find Deal

mié., ago. 27 - mié., sep. 10

4:30 pm - 10:10 amSEA-HKT

26h 40m2 stops

8:40 am - 7:10 amHKT-SEA

37h 30m1 stop

$699

Find Deal

mié., nov. 12 - lun., nov. 17

4:30 pm - 9:20 amSEA-CNX

26h 50m2 stops

8:00 pm - 2:25 pmCNX-SEA

32h 25m2 stops

$729

Find Deal

lun., sep. 1 - mar., sep. 16

7:45 am - 11:55 pmPDX-BKK

26h 10m2 stops

9:35 am - 6:46 pmBKK-PDX

23h 11m2 stops

$829ANA

Find Deal

mié., sep. 10 - mié., sep. 17

China Eastern flights from State of Washington to Thailand

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

China Eastern

Aug 30

GEG7:10 amSpokane

27h 30m

2 stops

BKK12:40 amBangkok Suvarnabhumi

Sep 5

BKK2:10 amBangkok Suvarnabhumi

33h 16m

2 stops

GEG9:26 pmSpokane

$793

Find similar

China Eastern

Aug 20

SEA7:10 amSeattle/Tacoma Intl

28h 45m

2 stops

BKK1:55 amBangkok Suvarnabhumi

Aug 31

BKK5:05 amBangkok Suvarnabhumi

25h 46m

2 stops

SEA4:51 pmSeattle/Tacoma Intl

$840

Find similar

China Airlines flights from State of Washington to Thailand

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

China Airlines

Aug 23

SEA1:40 amSeattle/Tacoma Intl

18h 05m

1 stop

BKK9:45 amBangkok Suvarnabhumi

Sep 9

BKK1:20 pmBangkok Suvarnabhumi

20h 25m

1 stop

SEA7:45 pmSeattle/Tacoma Intl

$791

Find similar

China Airlines

Aug 23

SEA1:40 amSeattle/Tacoma Intl

33h 45m

1 stop

BKK1:25 amBangkok Suvarnabhumi

Sep 9

BKK10:50 amBangkok Suvarnabhumi

22h 55m

1 stop

SEA7:45 pmSeattle/Tacoma Intl

$800

Find similar

China Airlines

Aug 23

SEA1:40 amSeattle/Tacoma Intl

33h 45m

1 stop

BKK1:25 amBangkok Suvarnabhumi

Sep 8

BKK2:40 amBangkok Suvarnabhumi

31h 05m

1 stop

SEA7:45 pmSeattle/Tacoma Intl

$803

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

mar. 2/3

8:45 am-6:45 pm

1 stop43h 00m

Bangkok Suvarnabhumi

mié. 2/11

3:40 pm-7:10 am

1 stop30h 30m

$511

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

dom. 1/18

8:45 am-8:30 am

1 stop32h 45m

Bangkok Suvarnabhumi

jue. 2/5

8:00 pm-7:10 am

1 stop26h 10m

$512

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

dom. 2/1

8:45 am-8:00 pm

1 stop20h 15m

Bangkok Suvarnabhumi

sáb. 2/7

3:40 pm-7:10 am

1 stop30h 30m

$513

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

mié. 2/4

9:30 pm-5:50 pm

1 stop29h 20m

Bangkok Suvarnabhumi

mié. 2/25

11:35 pm-6:35 pm

1 stop34h 00m

$580

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

lun. 2/2

12:10 am-11:15 am

1 stop20h 05m

Bangkok Suvarnabhumi

mié. 2/11

12:20 pm-1:55 pm

1 stop16h 35m

$638

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

lun. 2/2

12:10 am-11:15 am

1 stop20h 05m

Bangkok Suvarnabhumi

mié. 2/11

12:20 pm-1:55 pm

1 stop16h 35m

$641

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

mié. 8/27

10:00 am-6:00 am

2 stops30h 00m

Bangkok Suvarnabhumi

mié. 9/10

9:35 am-2:25 pm

1 stop18h 50m

$674

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

mié. 11/12

4:30 pm-10:10 am

2 stops26h 40m

Phuket City

lun. 11/17

8:40 am-7:10 am

1 stop37h 30m

$699

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

lun. 9/1

4:30 pm-9:20 am

2 stops26h 50m

Chiang Mai

mar. 9/16

8:00 pm-2:25 pm

2 stops32h 25m

$729

PortlandBangkok

PDX - BKK

PDXBKK

Portland

mié. 9/10

7:45 am-11:55 pm

2 stops26h 10m

Bangkok Suvarnabhumi

mié. 9/17

9:35 am-6:46 pm

2 stops23h 11m

$829

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 February is, on average, the cheapest month to fly to Thailand from State of Washington, with most prices found around $786. If you are unable to visit Thailand during the month of February, then departing from State of Washington during the month March is also very affordable. Most momondo users find prices during this month for around $820.

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 $926 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 $789 on momondo.

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

You could potentially save up to 37% 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	$283
Fastest flight time	18h 05m
Direct flights	None
Airports in Thailand	3 airports

The best one-way flight to Thailand from State of Washington in the past 72 hours is $283. The best round-trip flight deal from State of Washington to Thailand found on momondo in the last 72 hours is $511.

The fastest flight from State of Washington to Thailand takes 18h 05m

There are no direct flights from State of Washington to Thailand. Popular non-direct routes for this connection are Seattle/Tacoma Intl Airport - Phuket City Airport, Seattle/Tacoma Intl Airport - Bangkok Suvarnabhumi Airport and Seattle/Tacoma Intl Airport - Chiang Mai Airport.

There are 3 airports near Thailand: Phuket City (HKT), Bangkok Suvarnabhumi (BKK), Chiang Mai (CNX)

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 18 operators available for flights from Washington to Thailand as of August 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 8.0 7,980 reviews	Search Delta flights
Singapore Airlines	PriceFrom $539	Free Cancellation	Rating 8.1 1,346 reviews	Search Singapore Airlines flights
Asiana Airlines	PriceFrom $634	Free Cancellation	Rating 8.2 473 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $684	Free Cancellation	Rating 8.4 1,131 reviews	Search Korean Air flights
Philippine Airlines	PriceFrom $700	Free Cancellation	Rating 7.2 895 reviews	Search Philippine Airlines flights
ANA	PriceFrom $720	Free Cancellation	Rating 8.4 933 reviews	Search ANA flights
China Airlines	PriceFrom $730	Free Cancellation	Rating 8.3 762 reviews	Search China Airlines flights
STARLUX Airlines	PriceFrom $740	Free Cancellation	Rating 9.0 204 reviews	Search STARLUX Airlines flights
China Eastern	PriceFrom $755	Free Cancellation	Rating 7.2 160 reviews	Search China Eastern flights
Turkish Airlines	PriceFrom $773	Free Cancellation	Rating 7.3 3,940 reviews	Search Turkish 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.