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Cheap flights from Seattle to Hanoi

SEA — HAN
11 Oct — 18 Oct1
1 adult
1 adult, Economy

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 11 September 2025.

Popular in

December

Cheapest in

April

Average price

C$ 1,082
Highest demand for flights based on searches. 10% potential increase in price (C$ 207 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease (C$ 92 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 29 August 2025.

The price you pay for your flight from Seattle to Hanoi may vary depending on when you book. For the best chance of a lower fare, look to book 59 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Hanoi?

Currently, August is the cheapest month in which you can book a flight from Seattle to Hanoi (average of C$ 1,026). Flying from Seattle to Hanoi in December is currently the most expensive (average of C$ 1,489). 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 11 September 2025.
Read through reviews of airlines operating flights from Seattle to Hanoi, such as Korean Air and Asiana Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,139 reviews
Check prices

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Food

8.1

Crew

8.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
Korean Air
8.4
Very good
1,139 reviews
Korean Air
8.4
Very good
1,139 reviews
Check prices

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Food

8.1

Crew

8.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
Asiana Airlines
8.2
Very good
479 reviews
Korean Air
8.4
Very good
1,139 reviews
Check prices

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Food

8.1

Crew

8.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.

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?

    Flying on Asiana Airlines is currently your cheapest option to Hanoi, with prices starting at C$ 962. Another option worth looking into is Korean Air, starting at C$ 1,017 round trip. Asiana Airlines is currently priced 28% below the average price you’ll pay for this route.

  • 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, August is the cheapest month in which you can book a flight from Seattle to Hanoi (average of C$ 1,026). Flying from Seattle to Hanoi in December is currently the most expensive (average of C$ 1,489). 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.

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Top 2 airlines flying from Seattle to Hanoi

Discover the top 2 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 629,999 searches. Data last updated 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapestC$ 962AverageC$ 986FlexibilityNo cancel feeOn-time76%
Search Asiana Airlines flights
Korean AirCheapestC$ 1,017AverageC$ 1,077FlexibilityNo cancel feeOn-time81%
Search Korean Air flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Seattle to Hanoi?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Seattle to Hanoi. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Hanoi?

Cheapflights helps you find that perfect flight to Hanoi from Seattle by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Seattle to Hanoi with no change fees?

Need flexible booking options for your flight to Hanoi from Seattle? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Seattle to Hanoi become cheaper?

Not ready to book yet? You can track prices for flights from Seattle to Hanoi on Cheapflights with our Price Alert feature and get notified when better prices are available.

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