SEA - HAN

Find cheap flights from Seattle to Hanoi

1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Hanoi

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Hanoi, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Hanoi, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Seattle to Hanoi (SEA-HAN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Hanoi that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Hanoi

Multiple Airlines Logo
SEA-HAN
17681 kmmulti-stop
Multiple Airlines Logo
HAN-SEA
17681 kmmulti-stop
Multiple Airlines
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KAYAK's insights & trends for Seattle to Hanoi flights

Get data-powered insights and trends into flights from Seattle to Hanoi to help you find the cheapest flights, the best time to fly and much more.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Hanoi, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Hanoi is April, where tickets cost C$ 1,060 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is C$ 1,989 and C$ 1,964 respectively.

How far in advance should I book a flight from Seattle to Hanoi?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Hanoi, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to Hanoi, you should book around 6 weeks before departure. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.


Good to know

Low seasonJune
High seasonFebruary
Best time to beat the crowds but there is an average 45% increase in price.
Most popular time to fly and prices are also 22% lower on average.

When to book flights from Seattle to Hanoi

Are your dates flexible? Find out the best times to travel from Seattle to Hanoi based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Hanoi

  • Can I change my ticket from economy to first class on Delta Airlines?

    Delta Airlines offers a wide range of classes of tickets that vary based on travel dates and flight choices available for travelers looking to travel from Seattle to Hanoi. Also, Delta Airlines offers options for customers to upgrade their tickets from economy to first class. You can upgrade if you have adequate SkyMiles required in your SkyMiles account.

  • What is the quickest way from downtown to Seattle-Tacoma International Airport (SEA)?

    The quickest and most convenient means of getting to Seattle-Tacoma International Airport (SEA) if you need to catch a flight to Hanoi is a taxi. Located approximately 14 miles from downtown, it will take you roughly 22 minutes to get to the airport.

  • Do Alaska Airlines have a baggage policy?

    Yes, if you board Alaska Airlines to Hanoi, you are permitted to have a single carry-on bag and personal items, including; a briefcase or a purse. The policy stipulates that the bag must have a maximum dimension of 22 x 14 x 9 inches in length, height and width.

  • Are there freight operation services from Seattle to Hanoi?

    Business Travelers looking to export merchandise from Seattle to Hanoi can use the commercial Seattle-Tacoma International Airport (SEA) or King County International Airport (BFI). These airports offer freight operation services to their travelers at competitive ticket prices and cargo fees.

  • Which aircraft models fly most regularly from Seattle to Hanoi?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Seattle to Hanoi?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Hanoi.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Hanoi?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Hanoi from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Hanoi?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Hanoi with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Hanoi?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Hanoi from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Hanoi

  • If you are looking to fly to Hanoi from Seattle-Tacoma International Airport (SEA), you can book a one-stop flight offered by different airlines at the airport. Travelers looking to stop in Tokyo can book Delta, Vietnam, ANA or Jal Airlines. If you are seeking to travel via Seoul, you can board Asiana or Korean Air.
  • Several Airlines offer unaccompanied minor services for minors traveling to Hanoi from Seattle, including Delta and Alaska Airlines. Alaska Airlines has a dedicated program for unaccompanied minors known as Junior Jetsetters, ensuring they are well taken care of during their flight. The airline has an age restriction of 5 to 17 years for a child to be considered a minor.
  • Served by two main airports that offer both domestic and international flights, you can book a flight at Seattle-Tacoma International Airport (SEA) or King County International Airport (BFI). Seattle-Tacoma International Airport (SEA) is a hub for Delta Airlines and Alaska Airlines, offering a strong route network for broad connectivity. Also, Delta Airlines is part of the SkyTeam alliance, a strategic Airline alliance that allows for code-sharing, coordinated schedules and seamless connections with other airlines.
  • You can book a charter flight if you are looking to avoid long queues, security checks and customs experience on commercial flights. King County International Airport (BFI) offers private and charter flights to travelers with specific needs and preferences. Charter flights offer customized and personalized services such as specific on board services, seating arrangements and extra leg space. Charter carriers provide travelers privacy, convenience and flexibility for a comfortable and exclusive traveling experience.
  • Travelers looking to fly to Hanoi in Vietnam from Seattle can choose their destination airport as Noi Bai International Airport (HAN), located 22 miles on the northern side of downtown Hanoi. The airport is the major gateway for domestic and international travelers seeking to access the downtown quickly and conveniently. You can book a taxi outside the main terminal, and it takes roughly 45 minutes under ideal traffic conditions.

Top airlines flying from Seattle to Hanoi

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Hanoi. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Hanoi? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.4
Korean AirOverall score based on 1085 reviews
8.7Crew
8.2Entertainment
8.3Comfort
8.1Food
8.5Boarding
Airline reviews

Korean air has a little bit more seating space than Asiana air.

8.0 ExcellentAnonymous, Jun 2025CRK - ICN
Read more Korean Air reviews

Korean air has a little bit more seating space than Asiana air.

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

This flight was a superior flight in all regards. Extremely pleasant experience.

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Not many people, so you can lay down on two seats

The delay in Korea was a pain and set us back a day. I have to give big props to Korean Air for setting up a hotel with dinner and transportation to and from the hotel. I also needed assistance with a wheelchair and they did an outstanding job.

Great except for the delay in Korea. Korean Air did a great job setting up a hotel for the night. I also needed assistance with a wheelchair and they were outstanding.

The flight was on time and very quick, as expected, but the leg room isn't great in coach seats.

Just a typical domestic poor flight nothing more. There is no food choices in such a flight. Crew doesn't really care if you are on-board or not

long flights are difficult but the crew and amenities made it a very good experience

Flight was too cold. I wore a regular cotton tee and it wasn’t enough. It was a night time flight so I would have thought a blanket would be provided to passengers. A 4 hour flight and no options for a meal? I flew Asiana the next day from Seoul to Manilla. Same duration, 4 hours. They give everyone a pillow and blanket and serve a meal. Why is United so cheap and holding back meals and amenities? Also, they promote too much gay stuff and DEI in their advertisements. Please be mindful of other beliefs and don’t shove your gay ideology down my throat.

Staff always with a smile and very helpful with my mom who has mobility issues.

It was amazing. I was not expecting the phenomenal customer service Asiana provides.

It was all perfect and very pleasant for such long flights

The seats felt very small. We were supplied with pillows and blankets, which was nice. Lots of noise from the bathroom, plus exterior noise. Made it hard to hear the entertainment system, even using my own noise-cancelling headphones. The food was really bad. I generally request a vegetarian meal and one was supplied, but the pasta was cold and hard and there was nothing pleasant about it. Two meals were served on this flight; one was a repeat of the meal I had had on the flight immediately preceding this one, which was bad enough I didn't even try it. Drinks were very limited. All I wanted was water, and on a 10.5 hour flight, I was given 3 cups of about 3 ounces each.

The seats felt very small. We were supplied with pillows and blankets, which was nice. Lots of noise from the bathroom, plus exterior noise. Made it hard to hear the entertainment system, even using my own noise-cancelling headphones. The food was really bad. I generally request a vegetarian meal and one was supplied, but the pasta was cold and hard and there was nothing pleasant about it. Drinks were very limited. All I wanted was water, and on a 4 hour flight, I was given 2 cups of about 3 ounces each.

Everything was perfect. A flight attendant even brought me snacks after I declined food due to my desire to force myself to follow the destination time zone.

For the most part, it was an enjoyable experience. It's the 2nd half of the journey was a bit uncomfortable. It was on a noticable smaller plane compared to the previous one.

Only process that my luggage didn’t make it to my destination because of short connection but I understand

The boarding process was good. The toilet could be better maintained.

Everything you need to know for your flight from Seattle to Hanoi

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