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

Singapore Airlines, Philippine Airlines, and Asiana Airlines 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 18 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 55m 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 20m.

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 October 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.

$279 Cheap Flights from Washington to Thailand in 2025/26

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Cheap round-trip flights

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8:45 am - 7:50 amSEA-HKT

32h 05m1 stop

10:05 am - 7:10 amHKT-SEA

36h 05m1 stop

$508Singapore Airlines

Find Deal

vie., ene. 23 - vie., feb. 6

8:45 am - 2:05 pmSEA-HKT

38h 20m1 stop

8:40 am - 7:10 amHKT-SEA

37h 30m1 stop

$532Singapore Airlines

Find Deal

dom., feb. 8 - lun., feb. 16

12:10 am - 11:15 amSEA-BKK

20h 05m1 stop

11:55 pm - 1:55 pmBKK-SEA

29h 00m1 stop

$660Asiana Airlines

Find Deal

mié., ene. 14 - jue., ene. 29

11:50 am - 11:50 pmSEA-BKK

22h 00m1 stop

5:30 pm - 10:10 amBKK-SEA

30h 40m1 stop

$661Cathay Pacific

Find Deal

mar., abr. 7 - mar., abr. 21

9:30 pm - 12:00 pmSEA-BKK

23h 30m1 stop

1:20 pm - 6:40 pmBKK-SEA

20h 20m1 stop

$662Philippine Airlines

Find Deal

mié., nov. 26 - jue., dic. 25

12:00 pm - 11:20 pmSEA-BKK

21h 20m1 stop

9:40 am - 10:09 pmBKK-SEA

27h 29m2 stops

$663Korean Air

Find Deal

lun., oct. 27 - dom., nov. 9

12:00 pm - 11:20 pmSEA-BKK

21h 20m1 stop

9:40 am - 9:00 amBKK-SEA

38h 20m1 stop

$664Korean Air

Find Deal

lun., oct. 27 - dom., nov. 9

9:30 pm - 11:00 pmSEA-BKK

34h 30m1 stop

11:50 pm - 6:40 pmBKK-SEA

33h 50m1 stop

$665Philippine Airlines

Find Deal

mié., nov. 5 - mié., dic. 10

12:10 am - 10:00 pmSEA-BKK

30h 50m1 stop

11:55 pm - 2:55 pmBKK-SEA

29h 00m1 stop

$667Asiana Airlines

Find Deal

mar., nov. 4 - mar., may. 12

7:55 pm - 11:20 amSEA-HKT

24h 25m2 stops

11:50 am - 10:10 amHKT-SEA

36h 20m1 stop

$756Cathay Pacific

Find Deal

dom., mar. 1 - mar., mar. 31

Asiana Airlines flights from State of Washington to Thailand

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

Asiana Airlines

Jan 14

SEA12:10 amSeattle/Tacoma Intl

20h 05m

1 stop

BKK11:15 amBangkok Suvarnabhumi

Jan 29

BKK11:55 pmBangkok Suvarnabhumi

29h 00m

1 stop

SEA1:55 pmSeattle/Tacoma Intl

$660

Find similar

Asiana Airlines

Nov 4

SEA12:10 amSeattle/Tacoma Intl

30h 50m

1 stop

BKK10:00 pmBangkok Suvarnabhumi

May 12

BKK11:55 pmBangkok Suvarnabhumi

29h 00m

1 stop

SEA2:55 pmSeattle/Tacoma Intl

$667

Find similar

Asiana Airlines

Nov 3

SEA12:10 amSeattle/Tacoma Intl

20h 05m

1 stop

BKK11:15 amBangkok Suvarnabhumi

Nov 29

BKK11:55 pmBangkok Suvarnabhumi

29h 00m

1 stop

SEA1:55 pmSeattle/Tacoma Intl

$670

Find similar

Cathay Pacific flights from State of Washington to Thailand

Our best Cathay Pacific deals on State of Washington to Thailand flight tickets

Cathay Pacific

Apr 7

SEA11:50 amSeattle/Tacoma Intl

22h 00m

1 stop

BKK11:50 pmBangkok Suvarnabhumi

Apr 21

BKK5:30 pmBangkok Suvarnabhumi

30h 40m

1 stop

SEA10:10 amSeattle/Tacoma Intl

$661

Find similar

Cathay Pacific

Mar 1

SEA7:55 pmSeattle/Tacoma Intl

24h 25m

2 stops

HKT11:20 amPhuket City

Mar 31

HKT11:50 amPhuket City

36h 20m

1 stop

SEA10:10 amSeattle/Tacoma Intl

$756

Find similar

Cathay Pacific

Oct 15

SEA6:30 amSeattle/Tacoma Intl

42h 55m

2 stops

BKK3:25 pmBangkok Suvarnabhumi

Oct 27

BKK3:05 pmBangkok Suvarnabhumi

20h 55m

2 stops

SEA10:00 pmSeattle/Tacoma Intl

$871

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

vie. 1/23

8:45 am-7:50 am

1 stop32h 05m

Phuket City

vie. 2/6

10:05 am-7:10 am

1 stop36h 05m

$508

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

dom. 2/8

8:45 am-2:05 pm

1 stop38h 20m

Phuket City

lun. 2/16

8:40 am-7:10 am

1 stop37h 30m

$532

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

mié. 1/14

12:10 am-11:15 am

1 stop20h 05m

Bangkok Suvarnabhumi

jue. 1/29

11:55 pm-1:55 pm

1 stop29h 00m

$660

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

mar. 4/7

11:50 am-11:50 pm

1 stop22h 00m

Bangkok Suvarnabhumi

mar. 4/21

5:30 pm-10:10 am

1 stop30h 40m

$661

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

mié. 11/26

9:30 pm-12:00 pm

1 stop23h 30m

Bangkok Suvarnabhumi

jue. 12/25

1:20 pm-6:40 pm

1 stop20h 20m

$662

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

lun. 10/27

12:00 pm-11:20 pm

1 stop21h 20m

Bangkok Suvarnabhumi

dom. 11/9

9:40 am-10:09 pm

2 stops27h 29m

$663

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

lun. 10/27

12:00 pm-11:20 pm

1 stop21h 20m

Bangkok Suvarnabhumi

dom. 11/9

9:40 am-9:00 am

1 stop38h 20m

$664

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

mié. 11/5

9:30 pm-11:00 pm

1 stop34h 30m

Bangkok Suvarnabhumi

mié. 12/10

11:50 pm-6:40 pm

1 stop33h 50m

$665

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

mar. 11/4

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

mar. 5/12

11:55 pm-2:55 pm

1 stop29h 00m

$667

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

dom. 3/1

7:55 pm-11:20 am

2 stops24h 25m

Phuket City

mar. 3/31

11:50 am-10:10 am

1 stop36h 20m

$756

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 $763.

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 $899 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 $744 on momondo.

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

You could potentially save up to 35% 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

Direct flights	None

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 18 operators available for flights from Washington to Thailand as of October 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 7,971 reviews	Search Delta flights
Singapore Airlines	PriceFrom $523	Free Cancellation	Rating 8.1 1,377 reviews	Search Singapore Airlines flights
Philippine Airlines	PriceFrom $605	Free Cancellation	Rating 7.3 919 reviews	Search Philippine Airlines flights
Asiana Airlines	PriceFrom $624	Free Cancellation	Rating 8.2 486 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $671	Free Cancellation	Rating 8.4 1,148 reviews	Search Korean Air flights
ANA	PriceFrom $712	Free Cancellation	Rating 8.4 985 reviews	Search ANA flights
China Airlines	PriceFrom $730	Free Cancellation	Rating 8.3 768 reviews	Search China Airlines flights
STARLUX Airlines	PriceFrom $740	Free Cancellation	Rating 8.9 216 reviews	Search STARLUX Airlines flights
China Eastern	PriceFrom $755	Free Cancellation	Rating 7.2 168 reviews	Search China Eastern flights
Turkish Airlines	PriceFrom $773	Free Cancellation	Rating 7.3 3,996 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.

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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 $508

Flights to Phuket Cityfrom $508

Flights to Chiang Maifrom $659

Flights to Ko Samuifrom $733

Flights to Krabifrom $790

Flights to Surat Thanifrom $812

Flights to Chiang Raifrom $973

Flights to Udon Thanifrom $1,053

Flights to Hat Yaifrom $983

Flights to Khon Kaenfrom $785

Flights to Ubon Ratchathanifrom $920

Flights to Tratfrom $1,001

Cheap flights from Washington to Thailand from $279

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 3/10. 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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Big names and deals

Filter for what you want

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Asiana Airlines flights from State of Washington to Thailand

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

Cathay Pacific flights from State of Washington to Thailand

Our best Cathay Pacific 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

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

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 35% 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, Philippine Airlines, and Asiana 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

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