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$416+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SGN
Jun 23 — Jun 301
Tue 6/23
Tue 6/30
1 adult, Economy
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Cheap 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 May 24, 2026.

This FlightHub deal was found by Cheapflights users on 5/23. 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.
Sat 10/310:15 am
SEA
-
DAD
1 stop33h 40m
Singapore Airlines
Thu 10/1511:55 am
DAD
-
SEA
1 stop34h 50m
Singapore Airlines
Deal found 5/23$721
This FlightHub deal was found by Cheapflights users on 5/19. 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 10/1110:15 am
SEA
-
DAD
1 stop41h 15m
Singapore Airlines
Fri 10/164:45 pm
DAD
-
SEA
1 stop30h 00m
Singapore Airlines
Deal found 5/19$722
This oojo deal was found by Cheapflights users on 5/23. 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.
Tue 11/178:45 am
SEA
-
HAN
1 stop35h 45m
Singapore Airlines
Tue 11/2412:45 pm
HAN
-
SEA
1 stop33h 25m
Singapore Airlines
Deal found 5/23$768
This Justfly.com deal was found by Cheapflights users on 5/22. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/810:15 am
SEA
-
DAD
1 stop39h 40m
Singapore Airlines
Thu 9/2410:55 am
DAD
-
SEA
1 stop35h 50m
Singapore Airlines
Deal found 5/22$770
This oojo deal was found by Cheapflights users on 5/23. 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.
Sun 10/1110:15 am
SEA
-
HAN
1 stop39h 10m
Singapore Airlines
Wed 10/289:40 am
HAN
-
SEA
1 stop36h 30m
Singapore Airlines
Deal found 5/23$806
This oojo deal was found by Cheapflights users on 5/23. 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.
Tue 11/178:45 am
SEA
-
HAN
1 stop35h 45m
Singapore Airlines
Tue 12/16:25 pm
HAN
-
SEA
1 stop27h 45m
Singapore Airlines
Deal found 5/23$808
This United Airlines deal was found by Cheapflights users on 5/20. 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.
Mon 10/197:11 am
SEA
-
HAN
2 stops25h 04m
United Airlines
Wed 10/2111:35 pm
HAN
-
SEA
2 stops37h 51m
United Airlines
Deal found 5/20$821
This United Airlines deal was found by Cheapflights users on 5/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/288:40 pm
SEA
-
HAN
2 stops35h 35m
United Airlines
Wed 10/711:35 pm
HAN
-
SEA
2 stops32h 54m
United Airlines
Deal found 5/21$827
This FlightHub deal was found by Cheapflights users on 5/21. 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.
Tue 10/134:30 pm
SEA
-
HAN
1 stop39h 45m
ANA
Mon 11/212:25 am
HAN
-
SEA
2 stops28h 53m
ANA
Deal found 5/21$828
This FlightHub deal was found by Cheapflights users on 5/21. 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.
Tue 10/134:30 pm
SEA
-
HAN
1 stop39h 45m
ANA
Tue 11/312:25 am
HAN
-
SEA
1 stop27h 55m
ANA
Deal found 5/21$830
This FlightHub deal was found by Cheapflights users on 5/18. 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 9/2912:10 am
SEA
-
HAN
1 stop31h 50m
Asiana Airlines
Wed 10/1411:30 pm
HAN
-
SEA
1 stop29h 45m
Asiana Airlines
Deal found 5/18$837
This oojo deal was found by Cheapflights users on 5/20. 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 10/110:15 am
SEA
-
HAN
1 stop39h 10m
Singapore Airlines
Sun 11/112:45 pm
HAN
-
SEA
2 stops26h 19m
Singapore Airlines
Deal found 5/20$839

Find flight deals from Washington to Vietnam

Keep the following information in mind while searching for Washington to Vietnam flight deals. Data was last updated May 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$768
(oojo)

One-way from

$416
(FlightHub)

Popular in

June

Cheapest in

April

Average price

$821
Provider with most accurate pricing for Seattle/Tacoma Intl-Ho Chi Minh City flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Ho Chi Minh City flights.
Search Deals
From Washington to Vietnam
Search Deals
One-way flight from Washington to Vietnam
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($193 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

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 May 24, 2026.
Use the filters below to find and compare flights from Washington to Vietnam that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Fri 8/14

7:15 am-9:35 pm

2 stops24h 20m

Hanoi Noibai

Sun 9/20

11:10 pm-10:40 am

1 stop25h 30m

$925

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sat 8/15

1:05 pm-9:35 pm

1 stop18h 30m

Hanoi Noibai

Wed 9/9

11:10 pm-1:37 pm

1 stop28h 27m

$935

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Fri 8/14

7:20 am-10:35 am

2 stops37h 15m

Hanoi Noibai

Mon 9/21

12:05 pm-4:17 pm

2 stops42h 12m

$936
Quickest round-trip

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Thu 8/20

1:05 pm-10:10 pm

1 stop19h 05m

Ho Chi Minh City

Sat 9/5

7:30 am-1:37 pm

1 stop20h 07m

$987

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Tue 7/28

5:15 am-10:05 pm

3 stops26h 50m

Ho Chi Minh City

Wed 9/2

11:15 pm-2:25 pm

1 stop29h 10m

$1,014

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Mon 8/17

7:11 am-10:05 pm

3 stops24h 54m

Ho Chi Minh City

Mon 8/31

11:15 pm-2:25 pm

1 stop29h 10m

$1,014

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Mon 8/3

5:15 am-10:05 pm

3 stops26h 50m

Ho Chi Minh City

Mon 8/31

11:15 pm-2:25 pm

1 stop29h 10m

$1,014

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Wed 8/12

7:11 am-10:05 pm

3 stops24h 54m

Ho Chi Minh City

Mon 9/21

7:00 am-4:14 pm

2 stops23h 14m

$1,014

SeattlePhu Quoc

SEA - PQC

SEAPQC

Seattle/Tacoma Intl

Fri 7/3

2:10 am-6:20 pm

2 stops26h 10m

Phu Quoc Duong Dang

Sat 7/11

10:30 am-7:10 pm

2 stops22h 40m

$1,021

SeattleHo Chi Minh City

SEA - SGN

SEASGN

Seattle/Tacoma Intl

Thu 8/20

7:11 am-10:05 pm

3 stops24h 54m

Ho Chi Minh City

Sat 9/5

7:00 am-9:31 pm

3 stops28h 31m

$1,022

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/20

Showing 1-10 of 60 resultsSorted by cheapest first
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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, May is the cheapest month in which you can book a flight from State of Washington to Vietnam (average of $432). Flying from State of Washington to Vietnam in April is currently the most expensive (average of $2,082). 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.

How far ahead should I book a flight from State of Washington to Vietnam?

The price you pay for your flight from State of Washington to Vietnam may vary depending on when you book. For the best chance of a lower fare, look to book 89 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 18h 30m. 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?

    $243 is the cheapest one-way deal found within the past few days, from Singapore Airlines. You may also be able to find cheap deals on ANA and United Airlines, with prices starting from $307 and $310, 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, May is the cheapest month in which you can book a flight from State of Washington to Vietnam (average of $432). Flying from State of Washington to Vietnam in April is currently the most expensive (average of $2,082). 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

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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 May 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$400Average$884FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$432Average$882FlexibilityNo cancel feeOn-time81%
Singapore AirlinesCheapest$493Average$668FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$544Average$691FlexibilityNo cancel feeOn-time60%
STARLUX AirlinesCheapest$567Average$866FlexibilityNo cancel feeOn-timeN/A
Cathay PacificCheapest$606Average$931FlexibilityNo cancel feeOn-time72%
China AirlinesCheapest$614Average$789FlexibilityNo cancel feeOn-time70%
Asiana AirlinesCheapest$614Average$745FlexibilityNo cancel feeOn-time76%
ANACheapest$616Average$784FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$651Average$791FlexibilityNo cancel feeOn-time69%

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