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$331+ 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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — HAN
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Hanoi Noibai are usually found in April or February, booked 74 days in advance, depart on a Tuesday or Friday and return on a Sunday

Cheap 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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$731
(United Airlines)

One-way from

$331
(Justfly.com)

Popular in

July

Cheapest in

April

Average price

$802
Provider with most accurate pricing for Seattle/Tacoma Intl-Hanoi Noibai flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Hanoi Noibai flights.
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From Seattle/Tacoma Intl to Hanoi Noibai
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One-way flight from Seattle/Tacoma Intl to Hanoi Noibai
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($261 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($44 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find 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 March 28, 2025.

This Justfly.com deal was found by Cheapflights users on 3/28. 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.
Sun 10/510:15 amSEA - HAN
1 stop35h 15mSingapore Airlines
Sat 10/1812:40 pmHAN - SEA
1 stop34h 05mSingapore Airlines
Deal found 3/28$684
This United Airlines deal was found by Cheapflights users on 3/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/117:00 amSEA - HAN
2 stops25h 15mUnited Airlines
Sun 5/1811:35 pmHAN - SEA
2 stops30h 23mUnited Airlines
Deal found 3/27$731
This FlightHub deal was found by Cheapflights users on 3/27. 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.
Wed 9/32:15 pmSEA - HAN
1 stop17h 45mAsiana Airlines
Fri 9/191:25 pmHAN - SEA
1 stop37h 05mAsiana Airlines
Deal found 3/27$736
This oojo deal was found by Cheapflights users on 3/27. 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.
Sun 5/111:10 amSEA - HAN
1 stop19h 25mChina Airlines
Tue 5/275:50 pmHAN - SEA
1 stop15h 40mChina Airlines
Deal found 3/27$748
This ANA deal was found by Cheapflights users on 3/27. 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 ANA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/127:00 amSEA - HAN
2 stops25h 15mMultiple Airlines
Tue 5/2710:30 amHAN - SEA
2 stops17h 55mMultiple Airlines
Deal found 3/27$756
This oojo deal was found by Cheapflights users on 3/27. 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.
Tue 9/1612:30 amSEA - HAN
1 stop20h 35mEVA Air
Wed 10/86:00 pmHAN - SEA
1 stop15h 30mEVA Air
Deal found 3/27$805
This oojo deal was found by Cheapflights users on 3/27. 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.
Wed 9/1711:35 pmSEA - HAN
1 stop35h 10mPhilippine Airlines
Tue 10/72:30 amHAN - SEA
1 stop30h 45mPhilippine Airlines
Deal found 3/27$808
This ScholarTrip deal was found by Cheapflights users on 3/27. 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 ScholarTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/301:15 amSEA - HAN
1 stop18h 55mSTARLUX Airlines
Wed 4/25:50 pmHAN - SEA
1 stop36h 20mSTARLUX Airlines
Deal found 3/27$868
This FlightHub deal was found by Cheapflights users on 3/27. 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.
Wed 9/177:10 pmSEA - HAN
1 stop30h 15mTurkish Airlines
Wed 10/811:05 pmHAN - SEA
1 stop32h 10mTurkish Airlines
Deal found 3/27$938
This Delta deal was found by Cheapflights users on 3/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/91:05 pmSEA - HAN
1 stop31h 35mDelta
Sun 8/3111:10 pmHAN - SEA
1 stop28h 30mDelta
Deal found 3/27$1,011
This Justfly.com deal was found by Cheapflights users on 3/27. 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.
Sun 8/108:15 pmSEA - HAN
2 stops48h 25mKorean Air
Sun 8/3111:10 pmHAN - SEA
2 stops36h 36mKorean Air
Deal found 3/27$1,038
This Ovago deal was found by Cheapflights users on 3/27. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/57:15 amSEA - HAN
2 stops24h 35mJapan Airlines
Sat 10/1811:20 pmHAN - SEA
2 stops29h 33mJapan Airlines
Deal found 3/27$1,066

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 March 28, 2025.
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

Sun 5/11

7:00 am-10:15 pm

2 stops25h 15m

Hanoi Noibai

Sun 5/18

11:35 pm-3:58 pm

2 stops30h 23m

$731

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 9/3

2:15 pm-10:00 pm

1 stop17h 45m

Hanoi Noibai

Fri 9/19

1:25 pm-12:30 pm

1 stop37h 05m

$736

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 5/11

1:10 am-10:35 am

1 stop19h 25m

Hanoi Noibai

Tue 5/27

5:50 pm-7:30 pm

1 stop15h 40m

$748

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Mon 5/12

7:00 am-10:15 pm

2 stops25h 15m

Hanoi Noibai

Tue 5/27

10:30 am-2:25 pm

2 stops17h 55m

$756

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 9/17

5:45 pm-11:30 am

2 stops27h 45m

Hanoi Noibai

Wed 10/8

12:40 pm-8:45 am

1 stop34h 05m

$782

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Tue 9/16

12:30 am-11:05 am

1 stop20h 35m

Hanoi Noibai

Wed 10/8

6:00 pm-7:30 pm

1 stop15h 30m

$805

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 9/17

11:35 pm-12:45 am

1 stop35h 10m

Hanoi Noibai

Tue 10/7

2:30 am-7:15 pm

1 stop30h 45m

$808

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 9/17

7:10 pm-3:25 pm

1 stop30h 15m

Hanoi Noibai

Wed 10/8

11:05 pm-5:15 pm

1 stop32h 10m

$938

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sat 5/10

1:15 am-10:10 am

1 stop18h 55m

Hanoi Noibai

Sun 5/18

11:25 am-4:10 pm

1 stop18h 45m

$997

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sat 8/9

1:05 pm-10:40 am

1 stop31h 35m

Hanoi Noibai

Sun 8/31

11:10 pm-1:40 pm

1 stop28h 30m

$1,011

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/28

Showing 1-10 of 23 results
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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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
CheapfaremartPrice Accuracy-Trust Score*3 stars

*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?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Hanoi. Price data was last updated on March 21, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Hanoi, you should look to book at least 74 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 $975). Flying from Seattle to Hanoi in December is currently the most expensive (average of $1,618). 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 SEA to HAN?

Find hourly flight availability from Seattle to Hanoi. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 28, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 14% on flights from Seattle to Hanoi by exploring options for tickets in the morning.

What is the cheapest day to fly from Seattle to Hanoi?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Hanoi. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Hanoi flight should consider departing on Tuesday mornings when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Hanoi by month

Plan your trip to Hanoi by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Hanoi ranges from 0.6 - 11.7 inches per month. August is typically the wettest month, when rainfall can reach 11.7 in. December is typically the driest time to visit Hanoi when rainfall is around 0.6 in.

Temperature in Hanoi by month

Plan your trip to Hanoi by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Hanoi, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 62.6 F).

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 March 28, 2025.
To help decide which airline to fly from Seattle to Hanoi, see what other customers have to say about STARLUX Airlines, EVA Air and Korean Air. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.1
Wonderful
146 reviews

Comfort

9.0

Crew

9.3

Food

8.9

Boarding

9.0

Entertainment

9.0

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
STARLUX Airlines
9.1
Wonderful
146 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Comfort

9.0

Crew

9.3

Food

8.9

Boarding

9.0

Entertainment

9.0

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
EVA Air
8.4
Very good
1,169 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Comfort

9.0

Crew

9.3

Food

8.9

Boarding

9.0

Entertainment

9.0

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
Korean Air
8.4
Very good
1,050 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Comfort

9.0

Crew

9.3

Food

8.9

Boarding

9.0

Entertainment

9.0

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
ANA
8.3
Very good
829 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Comfort

9.0

Crew

9.3

Food

8.9

Boarding

9.0

Entertainment

9.0

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
China Airlines
8.2
Very good
722 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Comfort

9.0

Crew

9.3

Food

8.9

Boarding

9.0

Entertainment

9.0

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

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.

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

    Our cheapest airline available from Seattle to Hanoi is United Airlines. Our recent data shows that you can find tickets from as low as $731 on this airline. Additional options worth looking into are Asiana Airlines and China Airlines, starting at $736 and $748 round-trip. United Airlines is priced at 28% 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?

    $331 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 United Airlines and ANA, with prices starting from $394 and $399, 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 Seoul. Seattle to Hanoi flights stop in Taipei City the next most.

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

    Dongdaemun Market, Myeongdong Cathedral, and Bukchon Hanok Village are the most popular attractions in Seoul if you're in need of something to do during your layover. Dongdaemun Market, Myeongdong Cathedral, and Bukchon Hanok Village can be visited by traveling about 31.6 mi, 30.4 mi, and 30.6 mi respectively from Incheon Intl. Travelers can book a car rental at Incheon Intl for about $51 per day to make their sightseeing more efficient.

  • What are some popular points of interest to see during a layover in Taipei City?

    The majority of Taipei City visitors spend their time at Taipei 101, Shilin Night Market, and Raohe Street Night Market. Taipei 101, Shilin Night Market, and Raohe Street Night Market can be accessed by traveling approximately 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 $83 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 Tokyo.

  • 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 $975). Flying from Seattle to Hanoi in December is currently the most expensive (average of $1,618). 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$639Average$771FlexibilityNo cancel feeOn-time76%
Singapore AirlinesCheapest$682Average$1,083FlexibilityNo cancel feeOn-time81%
Korean AirCheapest$760Average$927FlexibilityNo cancel feeOn-time81%
DeltaCheapest$764Average$965FlexibilityNo cancel feeOn-timeN/A
Japan AirlinesCheapest$765Average$901FlexibilityNo cancel feeOn-time79%
China AirlinesCheapest$775Average$863FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$818Average$1,051FlexibilityNo cancel feeOn-time74%
STARLUX AirlinesCheapest$853Average$907FlexibilityNo cancel feeOn-timeN/A
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