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$413+ Cheap flights from Seattle (SEA) to Hanoi (HAN)

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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — HAN
Jun 19 — Jun 261
Fri 6/19
Fri 6/26
1 adult, Economy
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Cheap flight deals from Seattle to Hanoi

Cheapest flights from Seattle to Hanoi
Explore the most affordable flight options available from Seattle to Hanoi. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 20, 2026.

This oojo 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 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 5/18$767
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.
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 5/20$768
This oojo deal was found by Cheapflights users on 5/16. 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.
Sun 10/1110:15 am
SEA
-
HAN
1 stop35h 15m
Singapore Airlines
Wed 10/289:40 am
HAN
-
SEA
1 stop36h 30m
Singapore Airlines
Deal found 5/16$801
This Gotogate deal was found by Cheapflights users on 5/17. 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 11/303:40 pm
SEA
-
HAN
1 stop40h 25m
ANA
Sun 12/612:25 am
HAN
-
SEA
1 stop27h 55m
ANA
Deal found 5/17$812
This United Airlines deal was found by Cheapflights users on 5/17. 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 10/138:40 am
SEA
-
HAN
2 stops23h 35m
United Airlines
Wed 10/2111:35 pm
HAN
-
SEA
2 stops28h 49m
United Airlines
Deal found 5/17$822
This oojo deal was found by Cheapflights users on 5/15. 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 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
Sat 10/104:15 pm
HAN
-
SEA
1 stop30h 30m
Singapore Airlines
Deal found 5/15$823
This United Airlines 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 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 5/18$827
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.
Mon 8/3112:10 am
SEA
-
HAN
1 stop22h 05m
Asiana Airlines
Mon 9/711:30 pm
HAN
-
SEA
1 stop29h 45m
Asiana Airlines
Deal found 5/19$837

Find flight deals from Seattle to Hanoi

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Hanoi (HAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$801
(oojo)

One-way from

$413
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$781
Provider with most accurate pricing for Seattle/Tacoma Intl-Hanoi Noibai flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Hanoi Noibai flights.
Search Deals
From Seattle/Tacoma Intl to Hanoi Noibai
Search Deals
One-way flight from Seattle/Tacoma Intl to Hanoi Noibai
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($124 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($46 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 Seattle to Hanoi 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 20, 2026.
Use the filters below to find and compare flights from Seattle to Hanoi that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Thu 10/8

10:15 am-5:40 pm

1 stop41h 25m

Hanoi Noibai

Thu 10/15

8:00 pm-8:45 am

1 stop26h 45m

$801

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Thu 10/1

4:30 pm-10:15 pm

1 stop39h 45m

Hanoi Noibai

Sat 10/31

12:25 am-2:20 pm

1 stop27h 55m

$851

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Thu 10/29

12:00 pm-11:10 am

1 stop33h 10m

Hanoi Noibai

Mon 11/2

12:20 pm-9:00 am

1 stop35h 40m

$880

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Mon 11/9

12:00 pm-11:10 am

2 stops32h 10m

Hanoi Noibai

Mon 11/16

11:05 pm-9:00 am

1 stop24h 55m

$885
Quickest round-trip

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 9/30

7:20 am-9:35 pm

2 stops24h 15m

Hanoi Noibai

Sat 10/10

12:05 pm-9:54 pm

2 stops23h 49m

$936

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 10/11

10:55 am-10:15 pm

2 stops45h 20m

Hanoi Noibai

Tue 10/27

12:25 am-9:56 pm

2 stops35h 31m

$952

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Thu 10/8

8:40 am-10:15 pm

2 stops23h 35m

Hanoi Noibai

Thu 10/15

11:35 pm-9:59 am

2 stops48h 24m

$982

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Thu 8/20

1:20 pm-10:35 am

1 stop31h 15m

Hanoi Noibai

Wed 8/26

11:10 pm-9:48 pm

2 stops36h 38m

$1,026
Cheapest one-way

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Thu 9/10

1:00 pm-9:35 pm

1 stop18h 35m

$454

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Thu 9/10

12:50 pm-10:35 am

1 stop31h 45m

$455

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/19

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

Compare providers for flights from Seattle to Hanoi

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Hanoi in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Hanoi flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Hanoi flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Hanoi flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Hanoi flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Hanoi flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Hanoi

Have a flexible travel schedule? Discover the best time to fly to Hanoi from Seattle 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 Seattle to Hanoi

How far ahead should I book a flight from Seattle to Hanoi?

To ensure you get the cheapest price possible for a flight from Seattle to Hanoi, you should look to book at least 38 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Seattle to Hanoi?

Currently, September is the cheapest month in which you can book a flight from Seattle to Hanoi (average of $657). Flying from Seattle to Hanoi in December is currently the most expensive (average of $1,380). 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 much does it cost to fly round-trip from Seattle to Hanoi?

Reviews of airlines servicing Hanoi

Get insights into the airlines that provide service to Hanoi. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Hanoi. Reviews last updated May 20, 2026.
Read reviews from past customers who have flown STARLUX Airlines,EVA Air, andKorean Air from Seattle to Hanoi. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
8.9
Very good
316 reviews

Comfort

8.9

Crew

9.2

Food

8.7

Boarding

9.0

Overall

8.9

Entertainment

8.8

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
STARLUX Airlines
8.9
Very good
316 reviews
STARLUX Airlines
8.9
Very good
316 reviews

Comfort

8.9

Crew

9.2

Food

8.7

Boarding

9.0

Overall

8.9

Entertainment

8.8

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
EVA Air
8.5
Very good
1,457 reviews
STARLUX Airlines
8.9
Very good
316 reviews

Comfort

8.9

Crew

9.2

Food

8.7

Boarding

9.0

Overall

8.9

Entertainment

8.8

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
Korean Air
8.4
Very good
1,218 reviews
STARLUX Airlines
8.9
Very good
316 reviews

Comfort

8.9

Crew

9.2

Food

8.7

Boarding

9.0

Overall

8.9

Entertainment

8.8

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
China Airlines
8.3
Very good
826 reviews
STARLUX Airlines
8.9
Very good
316 reviews

Comfort

8.9

Crew

9.2

Food

8.7

Boarding

9.0

Overall

8.9

Entertainment

8.8

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
Asiana Airlines
8.1
Very good
534 reviews
STARLUX Airlines
8.9
Very good
316 reviews

Comfort

8.9

Crew

9.2

Food

8.7

Boarding

9.0

Overall

8.9

Entertainment

8.8

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again

Related info for your journey

Find useful and relevant information for your journey from Seattle to Hanoi. 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 Seattle to Hanoi?

    Singapore Airlines, United Airlines, and Korean Air can get you from Seattle to Hanoi in just under 24h 25m. Your travel time can differ by up to 22h 38m. Airlines will cover a distance of 6827 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Seattle to Hanoi round-trip?

    Our cheapest airline available from Seattle to Hanoi is Delta. Our recent data shows that you can find tickets from as low as $400 on this airline. Additional options worth looking into are Singapore Airlines and STARLUX Airlines, starting at $521 and $567 round-trip. Delta is priced at 54% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Seattle to Hanoi one-way?

    $270 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 Japan Airlines and Asiana Airlines, with prices starting from $315 and $329, respectively.

  • Where are the most common layover locations when flying from Seattle to Hanoi?

    Most of the time, Seattle to Hanoi flights that have layovers will stop in Taipei City.

  • What are some popular things to do or see while on a layover in Taipei City?

    Taipei 101, Raohe Street Night Market, and Shilin Night Market are the most popular attractions in Taipei City if you're in need of something to do during your layover. Taipei 101, Raohe Street Night Market, and Shilin Night Market can be visited by traveling about 21.0 mi, 21.6 mi, and 18.3 mi respectively from Taipei City Taiwan Taoyuan Intl. Travelers can book a car rental at Taipei City Taiwan Taoyuan Intl for about $85 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Seattle to Hanoi flights?

    Of the flights from Seattle to Hanoi that have layovers, the fewest flights stop in Seoul.

  • Can I find deals for flights from Seattle to Hanoi that include hotel bookings?

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

  • How can I find direct flights from Seattle to Hanoi?

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

  • Can I find deals for business class flights from Seattle to Hanoi?

    Yes. Cheapflights offers flight deals from Seattle to Hanoi 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 Seattle to Hanoi?

    Currently, September is the cheapest month in which you can book a flight from Seattle to Hanoi (average of $657). Flying from Seattle to Hanoi in December is currently the most expensive (average of $1,380). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Hanoi

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Ho Chi Minh City flights
Seattle to Da Nang flights
Portland to Ho Chi Minh City flights
Portland to Hanoi flights
Spokane to Ho Chi Minh City flights

Top 8 airlines flying from Seattle to Hanoi

Discover the top 8 airlines that operate flights from Seattle to Hanoi. 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 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$400Average$816FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$521Average$737FlexibilityNo cancel feeOn-time81%
STARLUX AirlinesCheapest$567Average$853FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$588Average$777FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$614Average$827FlexibilityNo cancel feeOn-time70%
Asiana AirlinesCheapest$624Average$718FlexibilityNo cancel feeOn-time76%
Philippine AirlinesCheapest$638Average$681FlexibilityNo cancel feeOn-time60%
EVA AirCheapest$758Average$1,015FlexibilityNo cancel feeOn-time74%

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