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$407+ Cheap flights from Washington to Thailand

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Jul 9 — Jul 161
Thu 7/9
Thu 7/16
1 adult, Economy
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Cheap flight deals from Washington to Thailand

Cheapest flights from Washington to Thailand
Explore the most affordable flight options available from Washington to Thailand. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 9, 2026.

This oojo deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2010:15 am
SEA
-
HKT
1 stop19h 35m
Singapore Airlines
Fri 10/3011:05 am
HKT
-
SEA
1 stop35h 05m
Singapore Airlines
Deal found 6/8$660
This oojo deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2210:15 am
SEA
-
HKT
1 stop34h 35m
Singapore Airlines
Sat 10/3110:05 am
HKT
-
SEA
1 stop36h 05m
Singapore Airlines
Deal found 6/8$670
This oojo deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1010:15 am
SEA
-
HKT
1 stop19h 35m
Singapore Airlines
Mon 10/266:00 pm
HKT
-
SEA
1 stop28h 10m
Singapore Airlines
Deal found 6/9$704
This oojo deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1710:15 am
SEA
-
HKT
1 stop40h 55m
Singapore Airlines
Thu 11/58:40 am
HKT
-
SEA
1 stop37h 30m
Singapore Airlines
Deal found 6/6$706
This oojo deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2310:15 am
SEA
-
HKT
1 stop33h 00m
Singapore Airlines
Tue 11/310:05 am
HKT
-
SEA
1 stop36h 05m
Singapore Airlines
Deal found 6/7$713
This oojo deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/248:45 am
SEA
-
HKT
1 stop41h 25m
Singapore Airlines
Tue 12/110:05 am
HKT
-
SEA
1 stop36h 05m
Singapore Airlines
Deal found 6/8$744
This oojo deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/265:01 pm
SEA
-
HKT
2 stops27h 09m
Singapore Airlines
Sat 10/318:40 am
HKT
-
SEA
1 stop37h 30m
Singapore Airlines
Deal found 6/7$791
This Korean Air deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/3111:00 am
SEA
-
CNX
1 stop20h 55m
Korean Air
Sun 2/2812:15 am
CNX
-
SEA
1 stop23h 45m
Korean Air
Deal found 6/9$810
This Korean Air deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/317:20 am
SEA
-
CNX
2 stops24h 35m
Korean Air
Mon 3/112:15 am
CNX
-
SEA
1 stop23h 45m
Korean Air
Deal found 6/9$816
This Korean Air deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/111:00 am
SEA
-
CNX
1 stop20h 55m
Korean Air
Tue 12/1512:15 am
CNX
-
SEA
2 stops30h 10m
Korean Air
Deal found 6/8$821
This oojo deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1310:15 am
SEA
-
HKT
1 stop40h 55m
Singapore Airlines
Sun 10/188:10 pm
HKT
-
SEA
1 stop50h 35m
Singapore Airlines
Deal found 6/9$823
This Korean Air deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/3111:00 am
SEA
-
CNX
1 stop20h 55m
Korean Air
Thu 3/412:15 am
CNX
-
SEA
1 stop23h 45m
Korean Air
Deal found 6/9$823

Find flight deals from Washington to Thailand

Keep the following information in mind while searching for Washington to Thailand flight deals. Data was last updated June 9, 2026.

Round-trip from

$660
(oojo)

One-way from

$437
(FlightHub)

Popular in

June

Cheapest in

October

Average price

$1,302
From Washington to Thailand
Search Deals
One-way flight from Washington to Thailand
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($178 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Thailand that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 9, 2026.
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

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Wed 11/11

4:15 pm-10:55 pm

2 stops39h 40m

Chiang Mai

Wed 11/18

12:15 am-9:00 am

1 stop23h 45m

$816

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Fri 10/30

7:20 am-10:55 pm

2 stops25h 35m

Chiang Mai

Thu 11/12

12:15 am-9:00 am

1 stop23h 45m

$841

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sun 9/6

7:16 am-10:10 pm

2 stops48h 54m

Phuket City

Wed 9/16

11:25 pm-10:40 am

1 stop25h 15m

$916

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sun 9/6

6:15 pm-10:10 pm

2 stops37h 55m

Phuket City

Sun 9/13

11:25 pm-2:42 pm

2 stops29h 17m

$927

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Mon 10/12

7:43 pm-8:00 pm

2 stops34h 17m

Bangkok Suvarnabhumi

Wed 11/4

8:00 pm-4:25 pm

2 stops35h 25m

$932

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 10/5

4:30 pm-4:35 am

1 stop22h 05m

Bangkok Suvarnabhumi

Mon 11/2

9:10 am-1:20 pm

1 stop19h 10m

$974

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 8/24

4:58 pm-9:35 am

2 stops26h 37m

Bangkok Suvarnabhumi

Wed 9/30

9:35 am-2:25 pm

1 stop18h 50m

$978

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 9/7

7:20 am-1:35 pm

2 stops40h 15m

Bangkok Suvarnabhumi

Wed 9/16

9:50 am-10:40 am

1 stop38h 50m

$978

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Mon 8/24

6:00 am-4:35 am

2 stops32h 35m

Bangkok Suvarnabhumi

Fri 8/28

9:35 am-6:51 pm

2 stops47h 16m

$1,009

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 8/14

3:30 pm-9:35 am

3 stops28h 05m

Bangkok Suvarnabhumi

Tue 9/1

9:35 am-2:25 pm

1 stop18h 50m

$1,022

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/7

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Washington to Thailand

Have a flexible travel schedule? Discover the best time to fly to Thailand from Washington with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Thailand

What is the cheapest month to book a flight from State of Washington to Thailand?

Currently, September is the cheapest month in which you can book a flight from State of Washington to Thailand (average of $498). Flying from State of Washington to Thailand in December is currently the most expensive (average of $2,163). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How far ahead should I book a flight from State of Washington to Thailand?

Booking 74 days in advance of your planned departure date is, on average, the best time to get cheap flights from State of Washington to Thailand. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Related info for your journey

Find useful and relevant information for your journey from Washington to Thailand. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    There are many flights that can get you from State of Washington to Thailand in 22h 05m. Fly via Korean Air, United Airlines, or China Eastern to get the fastest option. The distance from State of Washington to Thailand is about 7443 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from State of Washington to Thailand one-way?

    The cheapest airlines for a one-way flight from State of Washington to Thailand are Singapore Airlines ($272), Philippine Airlines ($301), and Hainan Airlines ($331).

  • Can I find deals for flights from Washington to Thailand that include hotel bookings?

    Yes. In addition to deals on Washington to Thailand flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Thailand?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Thailand.

  • Can I find deals for business class flights from Washington to Thailand?

    Yes. Cheapflights offers flight deals from Washington to Thailand by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from State of Washington to Thailand?

    Currently, September is the cheapest month in which you can book a flight from State of Washington to Thailand (average of $498). Flying from State of Washington to Thailand in December is currently the most expensive (average of $2,163). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Washington to Thailand

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Washington to Thailand

Discover the top 10 airlines that operate flights from Washington to Thailand. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$149Average$675FlexibilityNo cancel feeOn-time60%
Singapore AirlinesCheapest$510Average$699FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$623Average$1,373FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$625Average$718FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$652Average$872FlexibilityNo cancel feeOn-time81%
ANACheapest$680Average$850FlexibilityNo cancel feeOn-time80%
DeltaCheapest$694Average$921FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$697Average$1,057FlexibilityNo cancel feeOn-time69%
Cathay PacificCheapest$705Average$880FlexibilityNo cancel feeOn-time72%
China AirlinesCheapest$729Average$830FlexibilityNo cancel feeOn-time70%

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