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Southeast Asia

$265+ 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 3/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This FlightHub deal was found by Cheapflights users on 12/16. 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.
Tue 12/303:40 pmSEA - SGN
1 stop39h 10mANA
Tue 1/2711:05 pmSGN - SEA
1 stop29h 15mANA
Deal found 12/16$775
This FlightHub deal was found by Cheapflights users on 12/16. 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.
Tue 12/303:40 pmSEA - SGN
1 stop39h 10mANA
Thu 1/297:30 amSGN - SEA
2 stops28h 42mANA
Deal found 12/16$782
This KAYAK deal was found by Cheapflights users on 12/16. 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.
Tue 12/303:40 pmSEA - SGN
1 stop39h 10mANA
Fri 1/3011:05 pmSGN - SEA
1 stop29h 15mANA
Deal found 12/16$802
This KAYAK deal was found by Cheapflights users on 12/16. 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.
Tue 12/303:40 pmSEA - SGN
1 stop39h 10mANA
Sun 1/2511:05 pmSGN - SEA
2 stops37h 07mANA
Deal found 12/16$813
This FlightHub deal was found by Cheapflights users on 12/15. 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.
Tue 12/303:40 pmSEA - BKK
1 stop23h 50mANA
Fri 1/162:25 pmBKK - SEA
1 stop37h 55mANA
Deal found 12/15$825
This oojo deal was found by Cheapflights users on 12/16. 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 12/3012:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Mon 1/2612:20 pmBKK - SEA
1 stop16h 35mAsiana Airlines
Deal found 12/16$827
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Fri 12/269:06 amSEA - SGN
2 stops46h 49mUnited Airlines
Sun 1/411:05 pmSGN - SEA
1 stop29h 15mUnited Airlines
Deal found 12/16$828
This CrystalTravel deal was found by Cheapflights users on 12/16. 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 12/309:30 pmSEA - MNL
Nonstop14h 35mPhilippine Airlines
Wed 1/2810:40 pmMNL - SEA
Nonstop12h 00mPhilippine Airlines
Deal found 12/16$884
This FlightHub deal was found by Cheapflights users on 12/16. 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 12/293:40 pmSEA - SGN
1 stop39h 10mANA
Tue 1/2711:05 pmSGN - SEA
1 stop29h 15mANA
Deal found 12/16$885
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Tue 12/305:00 amSEA - SGN
2 stops26h 55mUnited Airlines
Wed 1/286:00 amSGN - SEA
2 stops22h 20mUnited Airlines
Deal found 12/16$886
This Justfly.com deal was found by Cheapflights users on 12/16. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:45 amSEA - MNL
1 stop28h 45mSingapore Airlines
Wed 1/282:05 pmMNL - SEA
1 stop33h 05mSingapore Airlines
Deal found 12/16$887
This FlightHub deal was found by Cheapflights users on 12/16. 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 12/293:40 pmSEA - SGN
1 stop39h 10mANA
Thu 1/297:30 amSGN - SEA
2 stops28h 42mANA
Deal found 12/16$892

Find 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 December 18, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$658
(Korean Air)

One-way from

$265
(oojo)

Popular in

June

Cheapest in

February

Average price

$1,276
Provider with most accurate pricing for Seattle/Tacoma Intl-Manila Ninoy Aquino Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Manila Ninoy Aquino Intl flights.
Search Deals
From Washington to Southeast Asia
Search Deals
One-way flight from Washington to Southeast Asia
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($175 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 18, 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

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Mon 1/19

12:35 pm-10:55 pm

2 stops43h 20m

Ho Chi Minh City

Mon 2/2

6:00 am-1:20 pm

2 stops22h 20m

$675

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Sun 1/18

1:30 pm-12:50 pm

2 stops32h 20m

Ho Chi Minh City

Mon 2/2

2:05 pm-9:00 am

1 stop33h 55m

$675

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Wed 1/21

12:24 pm-10:55 pm

2 stops43h 31m

Ho Chi Minh City

Tue 2/3

6:00 am-1:20 pm

2 stops22h 20m

$675

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Sun 1/18

5:40 pm-12:50 pm

2 stops28h 10m

Ho Chi Minh City

Wed 2/4

8:00 am-9:00 am

1 stop16h 00m

$675

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Tue 1/20

12:24 pm-10:55 pm

2 stops43h 31m

Ho Chi Minh City

Mon 2/2

6:00 am-1:20 pm

2 stops22h 20m

$675

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Tue 1/20

5:10 pm-10:55 pm

3 stops38h 45m

Ho Chi Minh City

Tue 2/3

6:00 am-3:54 pm

3 stops24h 54m

$675

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Sat 1/24

7:15 am-11:20 pm

2 stops25h 05m

Ho Chi Minh City

Sun 2/15

2:05 pm-9:00 am

1 stop33h 55m

$678

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Thu 1/22

5:40 pm-11:20 pm

2 stops38h 40m

Ho Chi Minh City

Fri 2/6

11:50 pm-9:00 am

1 stop24h 10m

$678

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Sat 1/31

5:10 pm-10:55 pm

3 stops38h 45m

Ho Chi Minh City

Sat 2/7

11:05 pm-9:12 pm

2 stops37h 07m

$679

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Sun 1/18

6:18 am-10:55 pm

2 stops25h 37m

Ho Chi Minh City

Mon 2/2

6:00 am-1:20 pm

2 stops22h 20m

$683

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

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, February is the cheapest month in which you can book a flight from State of Washington to Southeast Asia (average of $513). Flying from State of Washington to Southeast Asia in July is currently the most expensive (average of $689). 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 December 18, 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 37% 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 afternoons 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 19h 25m. United Airlines provides one of the quickest options available for as low as $719. The distance between State of Washington and Southeast Asia is about 6648 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 $275. Users have also found prices from $281 and $298 on Asiana Airlines and Philippine 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, February is the cheapest month in which you can book a flight from State of Washington to Southeast Asia (average of $513). Flying from State of Washington to Southeast Asia in July is currently the most expensive (average of $689). 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$924FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$459Average$1,063FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$474Average$963FlexibilityNo cancel feeOn-time81%
Singapore AirlinesCheapest$509Average$813FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$544Average$912FlexibilityNo cancel feeOn-time60%
Asiana AirlinesCheapest$611Average$775FlexibilityNo cancel feeOn-time76%
Cathay PacificCheapest$622Average$849FlexibilityNo cancel feeOn-time72%
Air CanadaCheapest$661Average$1,105FlexibilityNo cancel feeOn-time67%
China AirlinesCheapest$683Average$899FlexibilityNo cancel feeOn-time70%
Japan AirlinesCheapest$687Average$976FlexibilityNo cancel feeOn-time79%

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