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$343+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — HAN
Jun 18 — Jun 251
Wed 6/18
Wed 6/25
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 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 June 13, 2025.

Round-trip from

$671
(FlightHub)

One-way from

$343
(FlightHub)

Popular in

December

Cheapest in

April

Average price

$1,433
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. 7% potential increase in price ($83 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($43 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 13, 2025.

This FlightHub deal was found by Cheapflights users on 6/11. 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 10/111:35 pmSEA - HAN
1 stop35h 10mPhilippine Airlines
Tue 10/72:30 amHAN - SEA
1 stop30h 45mPhilippine Airlines
Deal found 6/11$671
This FlightHub deal was found by Cheapflights users on 6/11. 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 9/2610:15 amSEA - HAN
1 stop35h 15mSingapore Airlines
Sat 10/116:30 pmHAN - SEA
1 stop28h 15mSingapore Airlines
Deal found 6/11$711
This oojo deal was found by Cheapflights users on 6/12. 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 11/1912:10 amSEA - HAN
1 stop22h 00mAsiana Airlines
Sun 11/302:30 pmHAN - SEA
1 stop38h 25mAsiana Airlines
Deal found 6/12$735
This oojo deal was found by Cheapflights users on 6/11. 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 9/301:10 amSEA - HAN
1 stop25h 40mChina Airlines
Tue 10/711:35 amHAN - SEA
1 stop21h 45mChina Airlines
Deal found 6/11$740
This FlightHub deal was found by Cheapflights users on 6/13. 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 8/311:15 amSEA - HAN
1 stop18h 55mSTARLUX Airlines
Wed 4/15:50 pmHAN - SEA
1 stop36h 20mSTARLUX Airlines
Deal found 6/13$767
This United Airlines deal was found by Cheapflights users on 6/12. 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 7/225:10 amSEA - HAN
2 stops27h 05mUnited Airlines
Sun 8/2411:35 pmHAN - SEA
2 stops35h 19mUnited Airlines
Deal found 6/12$835
This Travelocity deal was found by Cheapflights users on 6/12. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/72:15 pmSEA - HAN
1 stop17h 45mMultiple Airlines
Sat 9/131:25 pmHAN - SEA
2 stops21h 51mMultiple Airlines
Deal found 6/12$850
This ScholarTrip deal was found by Cheapflights users on 6/13. 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.
Wed 11/55:59 pmSEA - HAN
2 stops26h 11mKorean Air
Tue 11/2511:00 pmHAN - SEA
2 stops30h 45mKorean Air
Deal found 6/13$856
This CrystalTravel deal was found by Cheapflights users on 6/12. 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.
Thu 11/2011:30 pmSEA - HAN
1 stop21h 05mEVA Air
Sun 11/306:20 pmHAN - SEA
1 stop14h 50mEVA Air
Deal found 6/12$857
This Alaska Airlines deal was found by Cheapflights users on 6/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/261:30 pmSEA - HAN
1 stop18h 20mAlaska Airlines
Sun 10/1211:20 pmHAN - SEA
1 stop25h 05mAlaska Airlines
Deal found 6/12$892
This oojo deal was found by Cheapflights users on 6/12. 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 9/111:40 amSEA - HAN
2 stops40h 25mCathay Pacific
Sun 9/2810:30 amHAN - SEA
2 stops42h 24mCathay Pacific
Deal found 6/12$896
This Delta deal was found by Cheapflights users on 6/12. 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.
Sun 8/1012:55 pmSEA - HAN
1 stop31h 45mDelta
Sun 8/3111:10 pmHAN - SEA
1 stop28h 30mDelta
Deal found 6/12$928

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 June 13, 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

Wed 10/1

11:35 pm-12:45 am

1 stop35h 10m

Hanoi Noibai

Tue 10/7

2:30 am-7:15 pm

1 stop30h 45m

$671

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Fri 9/26

10:15 am-11:30 am

1 stop35h 15m

Hanoi Noibai

Sat 10/11

6:30 pm-8:45 am

1 stop28h 15m

$711

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 11/19

12:10 am-1:10 pm

1 stop22h 00m

Hanoi Noibai

Sun 11/30

2:30 pm-1:55 pm

1 stop38h 25m

$735

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Tue 9/30

1:10 am-4:50 pm

1 stop25h 40m

Hanoi Noibai

Tue 10/7

11:35 am-7:20 pm

1 stop21h 45m

$740

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 8/31

1:15 am-10:10 am

1 stop18h 55m

Hanoi Noibai

Wed 4/1

5:50 pm-4:10 pm

1 stop36h 20m

$767

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Tue 7/22

5:10 am-10:15 pm

2 stops27h 05m

Hanoi Noibai

Sun 8/24

11:35 pm-8:54 pm

2 stops35h 19m

$835

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 9/7

2:15 pm-10:00 pm

1 stop17h 45m

Hanoi Noibai

Sat 9/13

1:25 pm-9:16 pm

2 stops21h 51m

$850

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 11/5

5:59 pm-11:10 am

2 stops26h 11m

Hanoi Noibai

Tue 11/25

11:00 pm-2:45 pm

2 stops30h 45m

$856

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Thu 11/20

11:30 pm-11:35 am

1 stop21h 05m

Hanoi Noibai

Sun 11/30

6:20 pm-6:10 pm

1 stop14h 50m

$857

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Fri 9/26

1:30 pm-9:50 pm

1 stop18h 20m

Hanoi Noibai

Sun 10/12

11:20 pm-10:25 am

1 stop25h 05m

$892

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 29 results
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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 June 9, 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 $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 June 13, 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 June 13, 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
178 reviews

Overall

9.1

Crew

9.3

Boarding

9.0

Entertainment

8.9

Comfort

9.0

Food

8.8

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
9.1
Wonderful
178 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Overall

9.1

Crew

9.3

Boarding

9.0

Entertainment

8.9

Comfort

9.0

Food

8.8

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
1,204 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Overall

9.1

Crew

9.3

Boarding

9.0

Entertainment

8.9

Comfort

9.0

Food

8.8

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
1,091 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Overall

9.1

Crew

9.3

Boarding

9.0

Entertainment

8.9

Comfort

9.0

Food

8.8

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
1,490 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Overall

9.1

Crew

9.3

Boarding

9.0

Entertainment

8.9

Comfort

9.0

Food

8.8

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.
China Airlines
8.3
Very good
738 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Overall

9.1

Crew

9.3

Boarding

9.0

Entertainment

8.9

Comfort

9.0

Food

8.8

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 $671 on this airline. Additional options worth looking into are Singapore Airlines and Asiana Airlines, starting at $711 and $735 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?

    $343 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 $383 and $401, 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, Bukchon Hanok Village, and Lotte World are the most popular attractions in Seoul if you're in need of something to do during your layover. Dongdaemun Market, Bukchon Hanok Village, and Lotte World can be visited by traveling about 31.6 mi, 30.6 mi, and 35.7 mi respectively from Incheon Intl. Travelers can book a car rental at Incheon Intl for about $54 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 $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 June 13, 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%
Korean AirCheapest$760Average$907FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$761Average$863FlexibilityNo cancel feeOn-time70%
DeltaCheapest$764Average$864FlexibilityNo cancel feeOn-timeN/A
STARLUX AirlinesCheapest$802Average$906FlexibilityNo cancel feeOn-timeN/A
EVA AirCheapest$808Average$982FlexibilityNo cancel feeOn-time74%

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