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$323+ 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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — HAN
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
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 January 26, 2026.

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.
Thu 5/1410:15 am
SEA
-
HAN
1 stop35h 15m
Singapore Airlines
Mon 5/186:30 pm
HAN
-
SEA
1 stop28h 15m
Singapore Airlines
Deal found 1/26$507
This Justfly.com deal was found by Cheapflights users on 1/25. 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 5/2110:15 am
SEA
-
HAN
1 stop35h 15m
Singapore Airlines
Mon 5/2512:40 pm
HAN
-
SEA
1 stop34h 05m
Singapore Airlines
Deal found 1/25$557
This oojo deal was found by Cheapflights users on 1/24. 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 4/2310:15 am
SEA
-
HAN
1 stop41h 25m
Singapore Airlines
Wed 5/612:40 pm
HAN
-
SEA
1 stop34h 05m
Singapore Airlines
Deal found 1/24$602
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.
Sat 8/1510:15 am
SEA
-
HAN
1 stop38h 50m
Singapore Airlines
Wed 9/912:50 pm
HAN
-
SEA
1 stop33h 55m
Singapore Airlines
Deal found 1/26$613
This CrystalTravel 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/112:55 am
SEA
-
HAN
1 stop21h 20m
Asiana Airlines
Thu 9/171:25 pm
HAN
-
SEA
1 stop15h 30m
Asiana Airlines
Deal found 1/26$615
This CrystalTravel deal was found by Cheapflights users on 1/24. 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.
Mon 9/1412:55 am
SEA
-
HAN
1 stop21h 20m
Asiana Airlines
Tue 9/291:25 pm
HAN
-
SEA
1 stop15h 30m
Asiana Airlines
Deal found 1/24$617
This CrystalTravel deal was found by Cheapflights users on 1/25. 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 9/112:55 am
SEA
-
HAN
1 stop21h 20m
Asiana Airlines
Fri 9/181:25 pm
HAN
-
SEA
1 stop15h 30m
Asiana Airlines
Deal found 1/25$619
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/312:55 am
SEA
-
HAN
1 stop21h 20m
Asiana Airlines
Tue 5/121:25 pm
HAN
-
SEA
1 stop15h 30m
Asiana Airlines
Deal found 1/26$622
This Delta deal was found by Cheapflights users on 1/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/31:00 pm
SEA
-
HAN
1 stop18h 35m
Delta
Mon 9/1411:10 pm
HAN
-
SEA
1 stop28h 27m
Delta
Deal found 1/24$626
This FlightHub deal was found by Cheapflights users on 1/25. 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 3/612:10 am
SEA
-
HAN
1 stop21h 00m
Asiana Airlines
Sat 3/211:30 pm
HAN
-
SEA
1 stop15h 25m
Asiana Airlines
Deal found 1/25$627
This Korean Air deal was found by Cheapflights users on 1/24. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1412:50 pm
SEA
-
HAN
1 stop18h 45m
Korean Air
Wed 9/3012:00 pm
HAN
-
SEA
1 stop36h 40m
Korean Air
Deal found 1/24$630
This FlightHub deal was found by Cheapflights users on 1/24. 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 5/1010:15 am
SEA
-
HAN
1 stop41h 25m
Singapore Airlines
Fri 5/153:20 pm
HAN
-
SEA
1 stop31h 25m
Singapore Airlines
Deal found 1/24$631

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 January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$507
(FlightHub)

One-way from

$323
(oojo)

Popular in

June

Cheapest in

September

Average price

$823
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. 19% potential increase in price ($232 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($43 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 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 January 26, 2026.
Use the filters below to find and compare flights from Seattle to Hanoi that are best for you.

Fly from

Seattle

Fly to

Hanoi

Route

Depart

Return

Price

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Fri 4/10

7:25 am-9:35 pm

2 stops24h 10m

Hanoi Noibai

Tue 4/21

11:10 pm-5:16 pm

2 stops32h 06m

$666

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sat 3/7

12:10 am-10:25 pm

1 stop31h 15m

Hanoi Noibai

Mon 3/23

1:30 pm-2:55 pm

1 stop15h 25m

$670

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sat 3/7

12:10 am-10:25 pm

1 stop31h 15m

Hanoi Noibai

Sun 3/22

1:30 pm-2:55 pm

1 stop15h 25m

$670

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Tue 3/3

11:30 am-9:45 pm

1 stop19h 15m

Hanoi Noibai

Thu 3/19

12:20 pm-2:20 pm

1 stop16h 00m

$706

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 3/4

11:30 am-11:10 am

1 stop32h 40m

Hanoi Noibai

Thu 3/19

12:20 pm-2:20 pm

1 stop16h 00m

$706

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 3/1

11:00 am-9:45 pm

1 stop19h 45m

Hanoi Noibai

Tue 3/10

12:20 pm-10:00 am

1 stop35h 40m

$760

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sat 3/7

11:30 am-9:45 pm

1 stop19h 15m

Hanoi Noibai

Thu 3/19

12:20 pm-2:20 pm

1 stop16h 00m

$792

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 3/8

12:00 pm-11:10 am

1 stop33h 10m

Hanoi Noibai

Mon 3/16

11:05 pm-7:05 pm

2 stops34h 00m

$806

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Tue 3/3

12:10 am-4:30 pm

1 stop25h 20m

Hanoi Noibai

Sun 3/22

5:30 pm-7:10 pm

1 stop15h 40m

$808

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Thu 3/12

11:50 pm-5:15 pm

1 stop27h 25m

Hanoi Noibai

Sun 3/22

12:35 pm-7:10 pm

1 stop20h 35m

$823

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/24

Showing 1-10 of 20 results
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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy2 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

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 $542). Flying from Seattle to Hanoi in June is currently the most expensive (average of $1,061). 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.

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 January 26, 2026.
Read reviews from past customers who have flown STARLUX Airlines, EVA Air, and Korean 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
268 reviews

Comfort

8.8

Boarding

8.9

Overall

8.9

Entertainment

8.8

Crew

9.1

Food

8.6

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
STARLUX Airlines
8.9
Very good
268 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Comfort

8.8

Boarding

8.9

Overall

8.9

Entertainment

8.8

Crew

9.1

Food

8.6

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
EVA Air
8.4
Very good
1,333 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Comfort

8.8

Boarding

8.9

Overall

8.9

Entertainment

8.8

Crew

9.1

Food

8.6

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
Korean Air
8.4
Very good
1,188 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Comfort

8.8

Boarding

8.9

Overall

8.9

Entertainment

8.8

Crew

9.1

Food

8.6

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
China Airlines
8.3
Very good
802 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Comfort

8.8

Boarding

8.9

Overall

8.9

Entertainment

8.8

Crew

9.1

Food

8.6

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
Asiana Airlines
8.1
Very good
501 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Comfort

8.8

Boarding

8.9

Overall

8.9

Entertainment

8.8

Crew

9.1

Food

8.6

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

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?

    Korean Air, Asiana Airlines, and Delta can get you from Seattle to Hanoi in just under 19h 15m. Your travel time can differ by up to 12h. 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 Korean Air. Our recent data shows that you can find tickets from as low as $588 on this airline. Additional options worth looking into are Singapore Airlines and Asiana Airlines, starting at $628 and $628 round-trip. Korean Air is priced at 37% 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?

    $280 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 Delta and Asiana Airlines, with prices starting from $353 and $355, 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, Shilin Night Market, and Raohe Street Night Market are the most popular attractions in Taipei City if you're in need of something to do during your layover. Taipei 101, Shilin Night Market, and Raohe Street Night Market can be visited by traveling about 21.0 mi, 18.3 mi, and 21.6 mi respectively from Taipei City Taiwan Taoyuan Intl. Travelers can book a car rental at Taipei City Taiwan Taoyuan Intl for about $77 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 $542). Flying from Seattle to Hanoi in June is currently the most expensive (average of $1,061). 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.

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 January 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$588Average$818FlexibilityNo cancel feeOn-time81%
Singapore AirlinesCheapest$628Average$820FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$628Average$731FlexibilityNo cancel feeOn-time76%
Philippine AirlinesCheapest$638Average$682FlexibilityNo cancel feeOn-time60%
China AirlinesCheapest$688Average$814FlexibilityNo cancel feeOn-time70%
DeltaCheapest$728Average$974FlexibilityNo cancel feeOn-timeN/A
STARLUX AirlinesCheapest$758Average$879FlexibilityNo cancel feeOn-timeN/A
EVA AirCheapest$765Average$897FlexibilityNo cancel feeOn-time74%

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