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$314+ Cheap flights from Washington to Vietnam

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 11/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SGN
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Washington to Vietnam

Keep the following information in mind while searching for Washington to Vietnam flight deals. Data was last updated September 15, 2025.

Round-trip from

$628
(FlightHub)

One-way from

$314
(CrystalTravel)

Popular in

June

Cheapest in

April

Average price

$763
From Washington to Vietnam
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One-way flight from Washington to Vietnam
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Highest demand for flights based on searches. 19% potential increase in price ($222 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($43 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Washington to Vietnam

Cheapest flights from Washington to Vietnam
Explore the most affordable flight options available from Washington to Vietnam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Gotogate deal was found by Cheapflights users on 9/13. 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.
Sun 9/2111:35 pmSEA - HAN
1 stop35h 55mPhilippine Airlines
Sat 10/42:30 amHAN - SEA
1 stop30h 45mPhilippine Airlines
Deal found 9/13$629
This oojo deal was found by Cheapflights users on 9/14. 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 9/2411:35 pmSEA - HAN
1 stop35h 10mPhilippine Airlines
Tue 10/142:30 amHAN - SEA
1 stop30h 45mPhilippine Airlines
Deal found 9/14$643
This FlightHub deal was found by Cheapflights users on 9/13. 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.
Wed 9/242:15 pmSEA - HAN
1 stop32h 00mAsiana Airlines
Wed 10/151:25 pmHAN - SEA
1 stop37h 05mAsiana Airlines
Deal found 9/13$661
This FlightHub deal was found by Cheapflights users on 9/15. 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 11/259:30 pmSEA - HAN
1 stop37h 20mPhilippine Airlines
Mon 12/12:50 amHAN - SEA
1 stop30h 50mPhilippine Airlines
Deal found 9/15$665
This FlightHub deal was found by Cheapflights users on 9/15. 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.
Wed 11/269:30 pmSEA - HAN
1 stop37h 20mPhilippine Airlines
Mon 12/12:50 amHAN - SEA
1 stop30h 50mPhilippine Airlines
Deal found 9/15$666
This Gotogate deal was found by Cheapflights users on 9/13. 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.
Sun 9/212:15 pmSEA - HAN
1 stop32h 00mAsiana Airlines
Sun 10/511:30 pmHAN - SEA
1 stop27h 00mAsiana Airlines
Deal found 9/13$668
This oojo deal was found by Cheapflights users on 9/13. 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 10/2012:50 pmSEA - SGN
1 stop20h 25mKorean Air
Thu 11/278:00 amSGN - SEA
1 stop16h 00mKorean Air
Deal found 9/13$668
This Gotogate deal was found by Cheapflights users on 9/13. 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 9/152:15 pmSEA - SGN
1 stop18h 30mAsiana Airlines
Mon 9/2212:05 pmSGN - SEA
1 stop38h 25mAsiana Airlines
Deal found 9/13$669
This Gotogate deal was found by Cheapflights users on 9/13. 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 10/2712:10 amSEA - SGN
1 stop20h 50mAsiana Airlines
Tue 11/412:10 pmSGN - SEA
1 stop16h 45mAsiana Airlines
Deal found 9/13$670
This CrystalTravel deal was found by Cheapflights users on 9/14. 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.
Sat 9/271:10 amSEA - SGN
1 stop25h 10mChina Airlines
Sun 10/55:30 pmSGN - SEA
1 stop15h 50mChina Airlines
Deal found 9/14$671
This FlightHub deal was found by Cheapflights users on 9/14. 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 11/1012:10 amSEA - SGN
1 stop19h 50mAsiana Airlines
Tue 3/312:10 amSGN - SEA
1 stop28h 45mAsiana Airlines
Deal found 9/14$672
This Gotogate deal was found by Cheapflights users on 9/13. 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.
Sun 10/192:15 pmSEA - SGN
1 stop18h 30mAsiana Airlines
Wed 11/2612:10 amSGN - SEA
1 stop28h 45mAsiana Airlines
Deal found 9/13$676

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Vietnam 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 September 15, 2025.
Use the filters below to find and compare flights from Washington to Vietnam that are best for you.

Fly from

Washington

Fly to

Vietnam

Route

Depart

Return

Price

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Tue 10/28

12:10 am-10:00 pm

1 stop31h 50m

Hanoi Noibai

Wed 11/5

11:30 pm-1:55 pm

1 stop29h 25m

$677

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 10/29

12:00 pm-9:45 pm

1 stop19h 45m

Hanoi Noibai

Wed 11/5

12:20 pm-9:00 am

1 stop35h 40m

$693

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Wed 10/29

12:00 pm-11:20 pm

1 stop21h 20m

Ho Chi Minh City

Tue 11/11

2:05 pm-9:00 am

1 stop33h 55m

$694

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Wed 10/22

7:10 am-11:15 pm

2 stops26h 05m

Ho Chi Minh City

Wed 11/12

11:50 pm-9:00 am

1 stop24h 10m

$700

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Mon 10/20

12:50 pm-12:35 pm

1 stop33h 45m

Ho Chi Minh City

Mon 11/3

2:05 pm-9:00 am

1 stop33h 55m

$700

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Wed 10/22

5:55 pm-12:35 pm

2 stops28h 40m

Ho Chi Minh City

Wed 11/19

11:50 pm-4:22 pm

2 stops31h 32m

$711

SeattleDa Nang

SEA - DAD

SEADAD

Seattle/Tacoma Intl

Tue 10/21

2:15 pm-9:35 pm

1 stop17h 20m

Da Nang

Fri 10/24

11:00 pm-12:30 pm

1 stop27h 30m

$746

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 10/12

1:10 am-10:35 am

1 stop19h 25m

Hanoi Noibai

Mon 10/20

5:50 pm-7:20 pm

1 stop15h 30m

$748

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 10/29

7:10 am-1:45 am

2 stops28h 35m

Hanoi Noibai

Tue 11/4

2:45 am-2:44 pm

2 stops26h 59m

$753

PortlandDa Nang

PDX - DAD

PDXDAD

Portland

Fri 3/6

4:00 pm-5:15 pm

2 stops34h 15m

Da Nang

Thu 3/19

6:25 pm-12:03 am

2 stops43h 38m

$769

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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

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

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

Currently, September is the cheapest month in which you can book a flight from State of Washington to Vietnam (average of $883). Flying from State of Washington to Vietnam in June is currently the most expensive (average of $1,426). 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 VN?

Find hourly flight availability from Washington to Vietnam. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

When flying from State of Washington to Vietnam, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

Find useful and relevant information for your journey from Washington to Vietnam. 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 Vietnam?

    Departing from State of Washington to Vietnam will take you 19h 25m. There are 6827 mi between State of Washington and Vietnam. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    $314 is the cheapest one-way deal found within the past few days, from Philippine Airlines. You may also be able to find cheap deals on Asiana Airlines and Korean Air, with prices starting from $363 and $365, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington to Vietnam 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 Vietnam?

    Currently, September is the cheapest month in which you can book a flight from State of Washington to Vietnam (average of $883). Flying from State of Washington to Vietnam in June is currently the most expensive (average of $1,426). 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 Vietnam

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 Vietnam

Discover the top 10 airlines that operate flights from Washington to Vietnam. 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$509Average$857FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$637Average$786FlexibilityNo cancel feeOn-time76%
Philippine AirlinesCheapest$658Average$721FlexibilityNo cancel feeOn-time60%
ANACheapest$688Average$803FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$691Average$1,078FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$695Average$846FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$708Average$1,078FlexibilityNo cancel feeOn-time81%
DeltaCheapest$736Average$947FlexibilityNo cancel feeOn-timeN/A
STARLUX AirlinesCheapest$756Average$910FlexibilityNo cancel feeOn-timeN/A
EVA AirCheapest$774Average$966FlexibilityNo cancel feeOn-time74%

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