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Southeast Asia

$258+ 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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
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 November 3, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$597
(Justfly.com)

One-way from

$258
(IEagle)

Popular in

June

Cheapest in

September

Average price

$822
Provider with most accurate pricing for Seattle/Tacoma Intl-Manila Ninoy Aquino Intl flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Manila Ninoy Aquino Intl flights.
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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. 15% potential increase in price ($164 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 3, 2025.

This oojo deal was found by Cheapflights users on 11/2. 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.
Wed 11/269:30 pmSEA - HAN
1 stop37h 15mPhilippine Airlines
Wed 12/242:50 amHAN - SEA
1 stop30h 50mPhilippine Airlines
Deal found 11/2$659
This Gotogate deal was found by Cheapflights users on 10/31. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/412:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Sat 12/611:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 10/31$674
This FlightHub deal was found by Cheapflights users on 11/1. 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.
Sun 11/169:30 pmSEA - BKK
1 stop34h 30mPhilippine Airlines
Tue 11/251:20 pmBKK - SEA
1 stop20h 20mPhilippine Airlines
Deal found 11/1$675
This Gotogate deal was found by Cheapflights users on 11/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/312:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Sun 11/2311:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 11/2$676
This FlightHub deal was found by Cheapflights users on 11/1. 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.
Thu 11/279:30 pmSEA - BKK
1 stop34h 30mPhilippine Airlines
Thu 12/41:20 pmBKK - SEA
1 stop20h 20mPhilippine Airlines
Deal found 11/1$678
This CrystalTravel deal was found by Cheapflights users on 11/1. 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.
Mon 12/13:40 pmSEA - BKK
1 stop22h 30mANA
Mon 12/87:10 amBKK - SEA
1 stop21h 10mANA
Deal found 11/1$680
This Gotogate deal was found by Cheapflights users on 11/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/412:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Wed 11/1211:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 11/2$681
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1012:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Sun 11/2311:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 11/1$683
This CrystalTravel deal was found by Cheapflights users on 11/3. 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.
Tue 11/2512:10 amSEA - MNL
1 stop30h 20mAsiana Airlines
Fri 2/2712:05 pmMNL - SEA
1 stop17h 50mAsiana Airlines
Deal found 11/3$683
This FlightHub deal was found by Cheapflights users on 11/1. 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.
Mon 11/2412:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Fri 12/511:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 11/1$684
This KAYAK deal was found by Cheapflights users on 11/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/99:30 pmSEA - BKK
1 stop34h 30mPhilippine Airlines
Wed 11/191:20 pmBKK - SEA
1 stop20h 20mPhilippine Airlines
Deal found 11/2$685
This SmartFares deal was found by Cheapflights users on 11/2. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/210:00 amSEA - BKK
1 stop22h 25mHainan Airlines
Mon 12/81:05 amBKK - SEA
1 stop21h 55mHainan Airlines
Deal found 11/2$686

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 November 3, 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

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 1/16

11:25 am-11:20 pm

1 stop20h 55m

Bangkok Suvarnabhumi

Sun 2/15

9:40 am-1:20 pm

1 stop18h 40m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 11/30

11:15 am-12:55 am

1 stop22h 40m

Bangkok Suvarnabhumi

Sun 12/7

2:05 am-1:20 pm

1 stop26h 15m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 11/30

11:15 am-12:45 am

1 stop22h 30m

Bangkok Suvarnabhumi

Sat 12/20

9:40 am-1:20 pm

1 stop18h 40m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 1/4

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

Wed 1/21

2:05 am-1:20 pm

1 stop26h 15m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 1/4

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

Tue 3/31

9:50 am-2:00 pm

1 stop18h 10m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 12/30

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

Fri 1/23

11:55 pm-1:55 pm

1 stop29h 00m

$696

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Tue 1/6

3:45 pm-9:50 pm

1 stop39h 05m

Ho Chi Minh City

Tue 1/20

11:05 pm-1:20 pm

1 stop29h 15m

$696

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Sat 1/24

11:25 am-11:20 pm

1 stop20h 55m

Ho Chi Minh City

Thu 2/5

8:00 am-1:20 pm

1 stop20h 20m

$696

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Sat 1/24

11:25 am-11:20 pm

1 stop20h 55m

Ho Chi Minh City

Wed 2/4

8:00 am-1:20 pm

1 stop20h 20m

$696

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 1/13

11:00 am-12:55 am

1 stop22h 55m

Bangkok Suvarnabhumi

Thu 3/12

12:55 am-10:00 am

1 stop23h 05m

$698

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

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, May is the cheapest month in which you can book a flight from State of Washington to Southeast Asia (average of $514). Flying from State of Washington to Southeast Asia in July is currently the most expensive (average of $717). 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 November 3, 2025.

A simple way to save on the total cost of your ticket is to fly from State of Washington to Southeast Asia in the evening. If you’re flexible enough to do this you can expect to save up to 36% on your trip compared to booking a flight in the afternoon.

What is the cheapest day to fly from State of Washington to Southeast Asia?

Use this chart to determine the cheapest time to fly round-trip from Washington to Southeast Asia. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their State of Washington to Southeast Asia flight should consider departing on Monday mornings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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.

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

    A quick flight from State of Washington to Southeast Asia can take about 20h 55m. Delta provides one of the quickest options available for as low as $695. The distance between State of Washington and Southeast Asia 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 Southeast Asia one-way?

    For one-way options, check prices for Singapore Airlines. According to our data, you can fly for as low as $258. Users have also found prices from $363 and $365 on Delta and Korean Air, 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, May is the cheapest month in which you can book a flight from State of Washington to Southeast Asia (average of $514). Flying from State of Washington to Southeast Asia in July is currently the most expensive (average of $717). 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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$949FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$459Average$928FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$474Average$985FlexibilityNo cancel feeOn-time81%
Singapore AirlinesCheapest$509Average$831FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$544Average$920FlexibilityNo cancel feeOn-time60%
Asiana AirlinesCheapest$618Average$785FlexibilityNo cancel feeOn-time76%
Cathay PacificCheapest$622Average$910FlexibilityNo cancel feeOn-time72%
Air CanadaCheapest$661Average$1,076FlexibilityNo cancel feeOn-time67%
China AirlinesCheapest$686Average$884FlexibilityNo cancel feeOn-time70%
Japan AirlinesCheapest$687Average$969FlexibilityNo cancel feeOn-time79%

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