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$357+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — HAN
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
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 September, booked 67 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 July 28, 2025.

Round-trip from

$669
(Gotogate)

One-way from

$357
(CrystalTravel)

Popular in

June

Cheapest in

April

Average price

$1,116
From Seattle/Tacoma Intl to Hanoi Noibai
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One-way flight from Seattle/Tacoma Intl to Hanoi Noibai
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Highest demand for flights based on searches. 18% potential increase in price ($220 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 28, 2025.

This Gotogate deal was found by Cheapflights users on 7/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/711:35 pmSEA - HAN
1 stop35h 55mPhilippine Airlines
Sat 9/202:30 amHAN - SEA
1 stop30h 45mPhilippine Airlines
Deal found 7/27$669
This FlightHub deal was found by Cheapflights users on 7/26. 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.
Sun 10/269:45 amSEA - HAN
1 stop41h 50mSingapore Airlines
Sat 11/812:35 pmHAN - SEA
1 stop33h 35mSingapore Airlines
Deal found 7/26$673
This oojo deal was found by Cheapflights users on 7/27. 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.
Mon 9/12:15 pmSEA - HAN
1 stop32h 00mAsiana Airlines
Wed 4/111:30 pmHAN - SEA
1 stop29h 25mAsiana Airlines
Deal found 7/27$687
This CrystalTravel deal was found by Cheapflights users on 7/26. 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.
Mon 8/251:20 pmSEA - HAN
1 stop18h 15mKorean Air
Mon 9/111:10 pmHAN - SEA
1 stop25h 30mKorean Air
Deal found 7/26$689
This United Airlines deal was found by Cheapflights users on 7/27. 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 9/73:19 pmSEA - HAN
2 stops40h 56mUnited Airlines
Sun 9/2111:35 pmHAN - SEA
2 stops36h 40mUnited Airlines
Deal found 7/27$761
This oojo deal was found by Cheapflights users on 7/27. 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.
Sat 10/41:15 amSEA - HAN
1 stop18h 55mSTARLUX Airlines
Sat 10/185:50 pmHAN - SEA
1 stop36h 20mSTARLUX Airlines
Deal found 7/27$789
This FlightHub deal was found by Cheapflights users on 7/27. 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.
Fri 9/57:00 amSEA - HAN
2 stops25h 15mANA
Sun 9/2111:35 pmHAN - SEA
2 stops33h 01mANA
Deal found 7/27$792
This oojo deal was found by Cheapflights users on 7/27. 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.
Sat 9/61:40 amSEA - HAN
1 stop18h 55mChina Airlines
Sun 9/2111:35 amHAN - SEA
1 stop21h 45mChina Airlines
Deal found 7/27$793

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 July 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 9/7

11:35 pm-1:30 am

1 stop35h 55m

Hanoi Noibai

Sat 9/20

2:30 am-7:15 pm

1 stop30h 45m

$669

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 10/26

9:45 am-5:35 pm

1 stop41h 50m

Hanoi Noibai

Sat 11/8

12:35 pm-7:10 am

1 stop33h 35m

$673

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Mon 9/1

2:15 pm-12:15 pm

1 stop32h 00m

Hanoi Noibai

Wed 4/1

11:30 pm-2:55 pm

1 stop29h 25m

$687

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Mon 8/25

1:20 pm-9:35 pm

1 stop18h 15m

Hanoi Noibai

Mon 9/1

11:10 pm-10:40 am

1 stop25h 30m

$689

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 9/7

3:19 pm-10:15 pm

2 stops40h 56m

Hanoi Noibai

Sun 9/21

11:35 pm-10:15 pm

2 stops36h 40m

$761

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sat 10/4

1:15 am-10:10 am

1 stop18h 55m

Hanoi Noibai

Sat 10/18

5:50 pm-4:10 pm

1 stop36h 20m

$789

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Fri 9/5

7:00 am-10:15 pm

2 stops25h 15m

Hanoi Noibai

Sun 9/21

11:35 pm-6:36 pm

2 stops33h 01m

$792

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sat 9/6

1:40 am-10:35 am

1 stop18h 55m

Hanoi Noibai

Sun 9/21

11:35 am-7:20 pm

1 stop21h 45m

$793

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Tue 9/2

2:15 pm-10:00 pm

1 stop17h 45m

$357

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Tue 9/2

5:41 pm-9:35 pm

2 stops37h 54m

$369

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 18 results
1
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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 July 25, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Hanoi, you should look to book at least 67 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 $956). 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 July 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.

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 July 28, 2025.
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
9.0
Wonderful
197 reviews

Crew

9.2

Comfort

8.9

Boarding

9.0

Food

8.8

Overall

9.0

Entertainment

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
9.0
Wonderful
197 reviews
STARLUX Airlines
9.0
Wonderful
197 reviews

Crew

9.2

Comfort

8.9

Boarding

9.0

Food

8.8

Overall

9.0

Entertainment

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
EVA Air
8.4
Very good
1,221 reviews
STARLUX Airlines
9.0
Wonderful
197 reviews

Crew

9.2

Comfort

8.9

Boarding

9.0

Food

8.8

Overall

9.0

Entertainment

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Korean Air
8.4
Very good
1,117 reviews
STARLUX Airlines
9.0
Wonderful
197 reviews

Crew

9.2

Comfort

8.9

Boarding

9.0

Food

8.8

Overall

9.0

Entertainment

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
ANA
8.4
Very good
922 reviews
STARLUX Airlines
9.0
Wonderful
197 reviews

Crew

9.2

Comfort

8.9

Boarding

9.0

Food

8.8

Overall

9.0

Entertainment

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Japan Airlines
8.3
Very good
1,535 reviews
STARLUX Airlines
9.0
Wonderful
197 reviews

Crew

9.2

Comfort

8.9

Boarding

9.0

Food

8.8

Overall

9.0

Entertainment

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

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 Philippine Airlines. Our recent data shows that you can find tickets from as low as $669 on this airline. Additional options worth looking into are Singapore Airlines and Asiana Airlines, starting at $673 and $687 round-trip. Philippine Airlines is priced at 30% 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?

    $357 is the cheapest one-way deal found within the past few days, from Asiana Airlines. You may also be able to find cheap deals on Korean Air and Japan Airlines, with prices starting from $369 and $372, 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.

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

    Dongdaemun Market, Namdaemun Market, 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, Namdaemun Market, and Bukchon Hanok Village can be visited by traveling about 31.6 mi, 29.8 mi, and 30.6 mi respectively from Incheon Intl. Travelers can book a car rental at Incheon Intl for about $62 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 Taipei City.

  • 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 $956). 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

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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 July 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$639Average$769FlexibilityNo cancel feeOn-time76%
Singapore AirlinesCheapest$682Average$1,007FlexibilityNo cancel feeOn-time81%
Japan AirlinesCheapest$717Average$880FlexibilityNo cancel feeOn-time79%
China AirlinesCheapest$747Average$854FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$760Average$908FlexibilityNo cancel feeOn-time81%
DeltaCheapest$764Average$864FlexibilityNo cancel feeOn-timeN/A
STARLUX AirlinesCheapest$802Average$898FlexibilityNo cancel feeOn-timeN/A
EVA AirCheapest$808Average$973FlexibilityNo cancel feeOn-time74%

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