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Southeast Asia

$297+ 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 4/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This oojo deal was found by Cheapflights users on 1/28. 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 8/2710:15 am
SEA
-
HAN
1 stop41h 25m
Singapore Airlines
Thu 9/2412:40 pm
HAN
-
SEA
1 stop34h 05m
Singapore Airlines
Deal found 1/28$517
This FlightHub deal was found by Cheapflights users on 1/26. 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.
Fri 5/810:15 am
SEA
-
DPS
1 stop22h 55m
Singapore Airlines
Mon 5/259:40 pm
DPS
-
SEA
1 stop26h 05m
Singapore Airlines
Deal found 1/26$547
This FlightHub deal was found by Cheapflights users on 1/28. 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 4/2310:15 am
SEA
-
DPS
1 stop22h 55m
Singapore Airlines
Thu 4/3012:10 pm
DPS
-
SEA
1 stop35h 35m
Singapore Airlines
Deal found 1/28$548
This Gurufare deal was found by Cheapflights users on 1/26. 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.
Tue 9/2910:15 am
SEA
-
DPS
1 stop31h 40m
Singapore Airlines
Mon 11/210:30 am
DPS
-
SEA
1 stop36h 40m
Singapore Airlines
Deal found 1/26$549
This FlightHub deal was found by Cheapflights users on 1/28. 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.
Fri 4/1010:15 am
SEA
-
DPS
1 stop31h 40m
Singapore Airlines
Mon 4/209:40 pm
DPS
-
SEA
1 stop26h 05m
Singapore Airlines
Deal found 1/28$550
This FlightHub deal was found by Cheapflights users on 1/27. 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 9/310:15 am
SEA
-
HAN
1 stop41h 25m
Singapore Airlines
Thu 9/1712:40 pm
HAN
-
SEA
1 stop34h 05m
Singapore Airlines
Deal found 1/27$554
This FlightHub deal was found by Cheapflights users on 1/28. 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 4/1610:15 am
SEA
-
DPS
1 stop22h 55m
Singapore Airlines
Mon 4/279:40 pm
DPS
-
SEA
1 stop26h 05m
Singapore Airlines
Deal found 1/28$555
This oojo deal was found by Cheapflights users on 1/27. 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 4/1610:15 am
SEA
-
DPS
1 stop22h 55m
Singapore Airlines
Thu 4/238:00 pm
DPS
-
SEA
1 stop27h 45m
Singapore Airlines
Deal found 1/27$572
This FlightHub deal was found by Cheapflights users on 1/27. 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.
Sat 4/1810:15 am
SEA
-
KUL
1 stop18h 30m
Singapore Airlines
Sat 4/252:35 pm
KUL
-
SEA
1 stop33h 10m
Singapore Airlines
Deal found 1/27$581
This Justfly.com deal was found by Cheapflights users on 1/27. 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.
Thu 4/210:15 am
SEA
-
DPS
1 stop22h 55m
Singapore Airlines
Sat 4/119:40 pm
DPS
-
SEA
1 stop26h 05m
Singapore Airlines
Deal found 1/27$595
This Justfly.com deal was found by Cheapflights users on 1/28. 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.
Fri 6/1210:15 am
SEA
-
DPS
1 stop22h 55m
Singapore Airlines
Fri 6/269:40 pm
DPS
-
SEA
1 stop26h 05m
Singapore Airlines
Deal found 1/28$602
This FlightHub deal was found by Cheapflights users on 1/27. 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.
Sat 8/1510:15 am
SEA
-
HAN
1 stop41h 25m
Singapore Airlines
Wed 9/912:50 pm
HAN
-
SEA
1 stop33h 55m
Singapore Airlines
Deal found 1/27$613

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$547
(FlightHub)

One-way from

$297
(FlightHub)

Popular in

June

Cheapest in

February

Average price

$785
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 ($182 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 29, 2026.
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

SeattleKuala Lumpur

SEA - KUL

SEAKUL

Seattle/Tacoma Intl

Sat 4/18

10:15 am-9:10 pm

1 stop19h 55m

Kuala Lumpur Intl

Sat 4/25

4:35 pm-8:45 am

1 stop31h 10m

$581

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 3/11

7:25 am-9:45 pm

2 stops24h 20m

Hanoi Noibai

Mon 3/16

11:05 pm-5:09 pm

2 stops32h 04m

$646

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sat 3/7

12:10 am-10:25 pm

1 stop31h 15m

Hanoi Noibai

Fri 3/13

1:30 pm-2:55 pm

1 stop15h 25m

$670

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Fri 3/6

12:10 am-10:25 pm

1 stop31h 15m

Hanoi Noibai

Fri 3/13

1:30 pm-2:55 pm

1 stop15h 25m

$670

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Fri 4/24

7:00 am-11:15 pm

2 stops26h 15m

Ho Chi Minh City

Mon 6/1

11:45 pm-2:43 pm

2 stops28h 58m

$681

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Mon 2/16

7:10 am-11:20 pm

2 stops25h 10m

Ho Chi Minh City

Thu 3/5

8:00 am-10:25 pm

2 stops29h 25m

$686

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Sun 3/1

5:10 pm-11:20 pm

2 stops39h 10m

Ho Chi Minh City

Tue 3/24

11:50 pm-9:48 pm

2 stops35h 58m

$692

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Mon 4/6

7:59 pm-11:15 pm

2 stops37h 16m

Ho Chi Minh City

Mon 5/4

11:45 pm-10:20 pm

2 stops36h 35m

$692

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Thu 3/5

7:10 am-11:20 pm

2 stops25h 10m

Ho Chi Minh City

Thu 4/9

7:35 am-10:40 am

1 stop17h 05m

$695

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Mon 3/23

7:25 am-10:25 pm

2 stops25h 00m

Ho Chi Minh City

Wed 4/8

1:55 pm-10:40 am

1 stop34h 45m

$695

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

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 $473). Flying from State of Washington to Southeast Asia in December is currently the most expensive (average of $681). 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 January 29, 2026.

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.

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 55m. Singapore Airlines provides one of the quickest options available for as low as $581. The distance between State of Washington and Southeast Asia is about 8063 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 Korean Air. According to our data, you can fly for as low as $262. Users have also found prices from $267 and $281 on Singapore 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, May is the cheapest month in which you can book a flight from State of Washington to Southeast Asia (average of $473). Flying from State of Washington to Southeast Asia in December is currently the most expensive (average of $681). 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$154Average$836FlexibilityNo cancel feeOn-time60%
Korean AirCheapest$418Average$873FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$440Average$1,069FlexibilityNo cancel feeOn-time69%
Singapore AirlinesCheapest$509Average$863FlexibilityNo cancel feeOn-time81%
DeltaCheapest$611Average$930FlexibilityNo cancel feeOn-timeN/A
Asiana AirlinesCheapest$615Average$776FlexibilityNo cancel feeOn-time76%
Cathay PacificCheapest$622Average$868FlexibilityNo cancel feeOn-time72%
Air CanadaCheapest$660Average$1,179FlexibilityNo cancel feeOn-time67%
China AirlinesCheapest$675Average$891FlexibilityNo cancel feeOn-time70%
ANACheapest$683Average$854FlexibilityNo cancel feeOn-time80%

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