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$279+ 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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — HAN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 59 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 September 11, 2025.

Round-trip from

$630
(oojo)

One-way from

$321
(oojo)

Popular in

December

Cheapest in

April

Average price

$781
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. 10% potential increase in price ($109 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($48 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 11, 2025.

This Booking.com deal was found by Cheapflights users on 9/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2111:35 pmSEA - HAN
1 stop35h 55mPhilippine Airlines
Sat 10/42:30 amHAN - SEA
1 stop30h 45mPhilippine Airlines
Deal found 9/11$636
This oojo deal was found by Cheapflights users on 9/11. 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.
Wed 9/2411:35 pmSEA - HAN
1 stop35h 10mPhilippine Airlines
Tue 10/142:30 amHAN - SEA
1 stop30h 45mPhilippine Airlines
Deal found 9/11$643
This CrystalTravel deal was found by Cheapflights users on 9/9. 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 9/152:15 pmSEA - HAN
1 stop17h 45mAsiana Airlines
Wed 9/2411:30 pmHAN - SEA
1 stop27h 00mAsiana Airlines
Deal found 9/9$655
This Gurufare deal was found by Cheapflights users on 9/10. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/59:30 pmSEA - HAN
1 stop37h 20mPhilippine Airlines
Tue 12/22:45 pmHAN - SEA
1 stop18h 50mPhilippine Airlines
Deal found 9/10$659
This FlightHub deal was found by Cheapflights users on 9/9. 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 9/142:15 pmSEA - HAN
1 stop17h 45mAsiana Airlines
Tue 9/231:25 pmHAN - SEA
1 stop37h 05mAsiana Airlines
Deal found 9/9$661
This Gotogate deal was found by Cheapflights users on 9/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/212:15 pmSEA - HAN
1 stop32h 00mAsiana Airlines
Sun 10/511:30 pmHAN - SEA
1 stop27h 00mAsiana Airlines
Deal found 9/11$665
This FlightHub deal was found by Cheapflights users on 9/11. 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.
Tue 9/232:15 pmSEA - HAN
1 stop17h 45mAsiana Airlines
Sun 10/1911:30 pmHAN - SEA
1 stop27h 00mAsiana Airlines
Deal found 9/11$666
This KAYAK deal was found by Cheapflights users on 9/9. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2811:35 pmSEA - HAN
1 stop35h 55mPhilippine Airlines
Sat 10/182:30 amHAN - SEA
1 stop30h 45mPhilippine Airlines
Deal found 9/9$678
This oojo deal was found by Cheapflights users on 9/10. 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.
Fri 9/2611:35 pmSEA - HAN
1 stop35h 10mPhilippine Airlines
Sat 10/112:30 amHAN - SEA
1 stop30h 45mPhilippine Airlines
Deal found 9/10$681
This FlightHub deal was found by Cheapflights users on 9/10. 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 9/242:15 pmSEA - HAN
1 stop17h 45mAsiana Airlines
Wed 10/151:25 pmHAN - SEA
1 stop37h 05mAsiana Airlines
Deal found 9/10$689
This Asiana Airlines deal was found by Cheapflights users on 9/10. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/242:15 pmSEA - HAN
1 stop17h 45mAsiana Airlines
Sat 9/271:25 pmHAN - SEA
1 stop37h 05mAsiana Airlines
Deal found 9/10$691

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 September 11, 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

Sat 11/15

12:10 am-10:00 pm

1 stop30h 50m

Hanoi Noibai

Sat 12/13

11:30 pm-1:55 pm

1 stop29h 25m

$691

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Mon 9/22

12:35 pm-9:35 pm

1 stop19h 00m

Hanoi Noibai

Sun 10/19

11:10 pm-1:30 pm

1 stop28h 20m

$729

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 9/24

7:15 am-9:35 pm

2 stops24h 20m

Hanoi Noibai

Tue 10/14

11:10 pm-10:40 am

1 stop25h 30m

$738

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Tue 9/23

3:45 pm-9:35 pm

2 stops39h 50m

Hanoi Noibai

Sun 10/19

11:10 pm-10:40 am

1 stop25h 30m

$738

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Tue 9/23

3:45 pm-9:35 pm

2 stops39h 50m

Hanoi Noibai

Wed 10/22

12:00 pm-10:40 am

1 stop36h 40m

$738

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Mon 9/22

7:20 am-9:35 pm

2 stops24h 15m

Hanoi Noibai

Wed 10/22

12:00 pm-10:40 am

1 stop36h 40m

$738

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 9/24

7:15 am-9:35 pm

2 stops24h 20m

Hanoi Noibai

Thu 10/16

12:00 pm-8:50 pm

2 stops22h 50m

$749

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Mon 9/22

5:40 pm-9:35 pm

2 stops37h 55m

Hanoi Noibai

Sun 10/19

11:10 pm-2:44 pm

2 stops29h 34m

$749

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 9/24

7:15 am-9:35 pm

2 stops24h 20m

Hanoi Noibai

Wed 10/15

12:00 pm-10:00 pm

2 stops24h 00m

$749

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Tue 9/23

3:45 pm-9:35 pm

2 stops39h 50m

Hanoi Noibai

Thu 10/16

12:00 pm-8:50 pm

2 stops22h 50m

$749

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 17 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 August 29, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Hanoi, you should look to book at least 59 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 $864). Flying from Seattle to Hanoi in December is currently the most expensive (average of $1,600). 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 September 11, 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.

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 September 11, 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
8.9
Very good
211 reviews

Comfort

8.9

Entertainment

8.9

Overall

8.9

Food

8.8

Crew

9.2

Boarding

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
8.9
Very good
211 reviews
STARLUX Airlines
8.9
Very good
211 reviews

Comfort

8.9

Entertainment

8.9

Overall

8.9

Food

8.8

Crew

9.2

Boarding

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
1,236 reviews
STARLUX Airlines
8.9
Very good
211 reviews

Comfort

8.9

Entertainment

8.9

Overall

8.9

Food

8.8

Crew

9.2

Boarding

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
1,139 reviews
STARLUX Airlines
8.9
Very good
211 reviews

Comfort

8.9

Entertainment

8.9

Overall

8.9

Food

8.8

Crew

9.2

Boarding

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.
China Airlines
8.3
Very good
767 reviews
STARLUX Airlines
8.9
Very good
211 reviews

Comfort

8.9

Entertainment

8.9

Overall

8.9

Food

8.8

Crew

9.2

Boarding

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.
Asiana Airlines
8.2
Very good
479 reviews
STARLUX Airlines
8.9
Very good
211 reviews

Comfort

8.9

Entertainment

8.9

Overall

8.9

Food

8.8

Crew

9.2

Boarding

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.

  • How long is the flight from Seattle to Hanoi?

    Asiana Airlines, Delta, and Korean Air can get you from Seattle to Hanoi in just under 19h. Your travel time can differ by up to 11h 50m. 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 Asiana Airlines. Our recent data shows that you can find tickets from as low as $638 on this airline. Additional options worth looking into are Singapore Airlines and Japan Airlines, starting at $682 and $717 round-trip. Asiana Airlines is priced at 34% lower than the current average price of a flight leaving 3 months from now.

  • 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, Lotte World, 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, Lotte World, and Bukchon Hanok Village can be visited by traveling about 31.6 mi, 35.7 mi, and 30.6 mi respectively from Incheon Intl. Travelers can book a car rental at Incheon Intl for about $64 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 $864). Flying from Seattle to Hanoi in December is currently the most expensive (average of $1,600). 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$638Average$738FlexibilityNo cancel feeOn-time76%
Singapore AirlinesCheapest$682Average$1,007FlexibilityNo cancel feeOn-time81%
Japan AirlinesCheapest$717Average$880FlexibilityNo cancel feeOn-time79%
Korean AirCheapest$732Average$903FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$747Average$849FlexibilityNo cancel feeOn-time70%
DeltaCheapest$764Average$864FlexibilityNo cancel feeOn-timeN/A
STARLUX AirlinesCheapest$790Average$907FlexibilityNo cancel feeOn-timeN/A
EVA AirCheapest$808Average$953FlexibilityNo cancel feeOn-time74%

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