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Southeast Asia

$270+ Cheap flights from Washington to Southeast Asia

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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
jun. 28 — jul. 51
sáb. 6/28
sáb. 7/5
1 adult, Economy
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Cheap flight deals from Washington to Southeast Asia

Keep the following information in mind while searching for Washington to Southeast Asia flight deals. Data was last updated junio 23, 2025.

Round-trip from

$656
(FlightHub)

One-way from

$270
(Gurufare)

Popular in

December

Cheapest in

April

Average price

$1,336
From Washington to Southeast Asia
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One-way flight from Washington to Southeast Asia
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Highest demand for flights based on searches. 8% potential increase in price ($91 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Washington to Southeast Asia

Cheapest flights from Washington to Southeast Asia
Explore the most affordable flight options available from Washington to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 23, 2025.

This Gurufare deal was found by Cheapflights users on 6/22. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/2310:15 amSEA - DPS
1 stop35h 45mSingapore Airlines
vie. 10/3112:05 pmDPS - SEA
1 stop35h 05mSingapore Airlines
Deal found 6/22$649
This FlightHub deal was found by Cheapflights users on 6/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/710:15 amSEA - KUL
1 stop20h 20mSingapore Airlines
sáb. 10/184:55 pmKUL - SEA
1 stop30h 50mSingapore Airlines
Deal found 6/21$656
This Trip.com deal was found by Cheapflights users on 6/23. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/2211:35 pmSEA - DPS
1 stop33h 20mPhilippine Airlines
mar. 10/2812:55 amDPS - SEA
1 stop33h 40mPhilippine Airlines
Deal found 6/23$703
This FlightHub deal was found by Cheapflights users on 6/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/111:35 pmSEA - KUL
1 stop34h 40mPhilippine Airlines
vie. 10/3111:40 amKUL - SEA
1 stop22h 55mPhilippine Airlines
Deal found 6/21$731
This iWofly deal was found by Cheapflights users on 6/22. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/2712:10 amSEA - BKK
1 stop31h 55mAsiana Airlines
jue. 11/1311:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 6/22$739
This CrystalTravel deal was found by Cheapflights users on 6/21. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/2710:00 amSEA - BKK
2 stops28h 35mANA
mié. 9/109:35 amBKK - SEA
1 stop18h 50mANA
Deal found 6/21$740
This FlightHub deal was found by Cheapflights users on 6/23. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/258:45 amSEA - BKK
1 stop43h 00mSingapore Airlines
sáb. 12/63:40 pmBKK - SEA
1 stop30h 30mSingapore Airlines
Deal found 6/23$742
This oojo deal was found by Cheapflights users on 6/23. 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.
vie. 9/1911:35 pmSEA - BKK
1 stop28h 05mPhilippine Airlines
dom. 10/51:30 pmBKK - SEA
1 stop19h 45mPhilippine Airlines
Deal found 6/23$744
This oojo deal was found by Cheapflights users on 6/21. 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.
mar. 11/411:00 amSEA - BKK
1 stop22h 45mKorean Air
lun. 11/171:00 amBKK - SEA
1 stop23h 00mKorean Air
Deal found 6/21$748
This oojo deal was found by Cheapflights users on 6/23. 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.
mar. 10/281:10 amSEA - BKK
1 stop18h 40mChina Airlines
dom. 11/162:35 amBKK - SEA
1 stop30h 40mChina Airlines
Deal found 6/23$760
This Delta deal was found by Cheapflights users on 6/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/212:35 pmSEA - BKK
1 stop22h 30mDelta
mar. 9/169:50 amBKK - SEA
1 stop17h 50mDelta
Deal found 6/23$780
This United Airlines deal was found by Cheapflights users on 6/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/224:30 pmSEA - BKK
1 stop22h 05mUnited Airlines
lun. 10/69:35 amBKK - SEA
1 stop18h 50mUnited Airlines
Deal found 6/23$785

Cheapflights Fare Finder

Customize your flight search to find flights from Washington to Southeast Asia 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 junio 23, 2025.
Use the filters below to find and compare flights from Washington to Southeast Asia that are best for you.

Fly from

Washington

Fly to

Southeast Asia

Route

Depart

Return

Price

SeattleDenpasar

SEA - DPS

SEADPS

Seattle/Tacoma Intl

jue. 10/23

10:15 am-1:00 pm

1 stop35h 45m

Denpasar Bali Ngurah Rai

vie. 10/31

12:05 pm-8:10 am

1 stop35h 05m

$649

SeattleKuala Lumpur

SEA - KUL

SEAKUL

Seattle/Tacoma Intl

mar. 10/7

10:15 am-9:35 pm

1 stop20h 20m

Kuala Lumpur Intl

sáb. 10/18

4:55 pm-8:45 am

1 stop30h 50m

$656

SeattleDenpasar

SEA - DPS

SEADPS

Seattle/Tacoma Intl

mié. 10/22

11:35 pm-11:55 pm

1 stop33h 20m

Denpasar Bali Ngurah Rai

mar. 10/28

12:55 am-7:35 pm

1 stop33h 40m

$703

SeattleKuala Lumpur

SEA - KUL

SEAKUL

Seattle/Tacoma Intl

mié. 10/1

11:35 pm-1:15 am

1 stop34h 40m

Kuala Lumpur Intl

vie. 10/31

11:40 am-7:35 pm

1 stop22h 55m

$731

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

lun. 10/27

12:10 am-10:05 pm

1 stop31h 55m

Bangkok Suvarnabhumi

jue. 11/13

11:55 pm-1:55 pm

1 stop29h 00m

$739

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

mié. 8/27

10:00 am-4:35 am

2 stops28h 35m

Bangkok Suvarnabhumi

mié. 9/10

9:35 am-2:25 pm

1 stop18h 50m

$740

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

mar. 11/25

8:45 am-6:45 pm

1 stop43h 00m

Bangkok Suvarnabhumi

sáb. 12/6

3:40 pm-7:10 am

1 stop30h 30m

$742

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

vie. 9/19

11:35 pm-5:40 pm

1 stop28h 05m

Bangkok Suvarnabhumi

dom. 10/5

1:30 pm-7:15 pm

1 stop19h 45m

$744

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

mar. 11/4

11:00 am-12:45 am

1 stop22h 45m

Bangkok Suvarnabhumi

lun. 11/17

1:00 am-9:00 am

1 stop23h 00m

$748

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

mar. 10/28

1:10 am-9:50 am

1 stop18h 40m

Bangkok Suvarnabhumi

dom. 11/16

2:35 am-6:15 pm

1 stop30h 40m

$760

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/22

Showing 1-10 of 60 results
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Best time to book a flight from Washington to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia 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 Southeast Asia

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

Currently, March is the cheapest month in which you can book a flight from State of Washington to Southeast Asia (average of $953). Flying from State of Washington to Southeast Asia in December is currently the most expensive (average of $1,574). 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.

What is the cheapest time of day to fly from WA to YJX?

Find hourly flight availability from Washington to Southeast Asia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated junio 23, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from State of Washington to Southeast Asia as you normally would.

Rainfall in Southeast Asia by month

Plan your trip to Southeast Asia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Southeast Asia ranges from 0.4 - 15.7 inches per month. July is typically the wettest month, when rainfall can reach 15.7 in. February is typically the driest time to visit Southeast Asia when rainfall is around 0.4 in.

Temperature in Southeast Asia by month

Plan your trip to Southeast Asia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Southeast Asia, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).

Reviews of airlines servicing Southeast Asia

Get insights into the airlines that provide service to Southeast Asia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Southeast Asia. Reviews last updated junio 23, 2025.
See what other customers who have flown with STARLUX Airlines, EVA Air and Korean Air from Washington to Southeast Asia have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.1
Wonderful
183 reviews

Comfort

9.0

Crew

9.3

Boarding

9.1

Overall

9.1

Entertainment

9.0

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
9.1
Wonderful
183 reviews
STARLUX Airlines
9.1
Wonderful
183 reviews

Comfort

9.0

Crew

9.3

Boarding

9.1

Overall

9.1

Entertainment

9.0

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
EVA Air
8.4
Very good
1,207 reviews
STARLUX Airlines
9.1
Wonderful
183 reviews

Comfort

9.0

Crew

9.3

Boarding

9.1

Overall

9.1

Entertainment

9.0

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Korean Air
8.4
Very good
1,092 reviews
STARLUX Airlines
9.1
Wonderful
183 reviews

Comfort

9.0

Crew

9.3

Boarding

9.1

Overall

9.1

Entertainment

9.0

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Japan Airlines
8.3
Very good
1,503 reviews
STARLUX Airlines
9.1
Wonderful
183 reviews

Comfort

9.0

Crew

9.3

Boarding

9.1

Overall

9.1

Entertainment

9.0

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
China Airlines
8.3
Very good
744 reviews
STARLUX Airlines
9.1
Wonderful
183 reviews

Comfort

9.0

Crew

9.3

Boarding

9.1

Overall

9.1

Entertainment

9.0

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

Related info for your journey

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

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

    For one-way options, check prices for Singapore Airlines. According to our data, you can fly for as low as $270. Users have also found prices from $364 and $381 on China Airlines and Asiana Airlines, respectively.

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

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

  • How can I find direct flights from Washington to Southeast Asia?

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

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

    Yes. Cheapflights offers flight deals from Washington to Southeast Asia 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 Southeast Asia?

    Currently, March is the cheapest month in which you can book a flight from State of Washington to Southeast Asia (average of $953). Flying from State of Washington to Southeast Asia in December is currently the most expensive (average of $1,574). 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

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Alternative routes for Washington to Southeast Asia

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 Southeast Asia

Discover the top 10 airlines that operate flights from Washington to Southeast Asia. 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 junio 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$1,057FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$587Average$1,008FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$633Average$829FlexibilityNo cancel feeOn-time76%
Philippine AirlinesCheapest$682Average$1,006FlexibilityNo cancel feeOn-time60%
Japan AirlinesCheapest$687Average$1,176FlexibilityNo cancel feeOn-time79%
ANACheapest$688Average$941FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$691Average$1,037FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$695Average$1,046FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$712Average$899FlexibilityNo cancel feeOn-time70%
Air CanadaCheapest$712Average$1,149FlexibilityNo cancel feeOn-time67%

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