Cheap flights from Seattle to Hanoi from $342
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Hanoi departing on 9/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from Seattle to Hanoi
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between Seattle and Hanoi?
What is the cheapest month to fly to Hanoi?
The cheapest month to fly to Hanoi from Seattle is in April. Flight prices, which tend to average around $771, are often lower during this time because this is during the off-season. If you’re not able to fly to Hanoi in April, then February is your next best option. Flight prices from Seattle to Hanoi during February average around $783.
What is the cheapest day to depart on your flight to Hanoi?
According to our data, Tuesday is the cheapest day to fly to Hanoi from Seattle. The lowest ticket price found for a Tuesday departure recently was $836. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Hanoi on Monday is $1,201.
What is the cheapest time of day to depart on your flight to Hanoi?
Our most recent data shows that the best time of day to fly to Hanoi is in the morning. Flights from Seattle to Hanoi during this time can be as low as $971. Try not to purchase tickets in the afternoon because they tend to be around $1,125. Of course, these prices can vary depending on the time of year and what airport you fly to.
How far in advance should I book a flight to Hanoi?
You are more likely to see cheaper flights to Hanoi from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Hanoi for around $966 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Hanoi from Seattle for as low as $744 on momondo.
Can stopping save me money on Seattle to Hanoi flights?
You could potentially save up to 2% on your flight if you consider stops on a Seattle to Hanoi flight.
How have Seattle to Hanoi flight prices changed over time?
As of July 2025, prices for Seattle to Hanoi flights are approximately 12% cheaper when compared to flights at the same time last year.
What is the cheapest airline that flies from Seattle/Tacoma Intl to Hanoi Noibai?
Singapore Airlines, Korean Air, and Japan Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Hanoi Noibai
What airlines fly to Hanoi?
Asiana Airlines, China Airlines and EVA Air are the top three most popular airlines that fly to Hanoi from Seattle according to our data. Asiana Airlines is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Hanoi. Keep in mind that there are 8 different airlines that fly to Hanoi on a routine basis, so you have a few additional options to choose from.
When to book flights from Seattle to Hanoi
Cheap Seattle to Hanoi (SEA to HAN) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Hanoi
How far is Seattle/Tacoma Intl to Hanoi Noibai by plane?
The distance between Seattle/Tacoma Intl and Hanoi Noibai is about 6829.4 mi. Flights usually cover this in 17h 45m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Hanoi Noibai Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Hanoi Noibai Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Hanoi Noibai Airport?
There are 8 operators available for flights from Seattle/Tacoma Intl Airport to Hanoi Noibai Airport as of July 2025.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Hanoi Noibai Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Hanoi Noibai Airport.
What documentation or ID do you need to fly to Hanoi Noibai Airport?
The travel and health documents required for your trip to Hanoi Noibai Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Hanoi Noibai Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Seattle to Hanoi?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Seattle to Hanoi is Asiana Airlines (34% of total bookings). The next most popular airlines are China Airlines (22%), EVA Air (15%), and Korean Air (12%).
Best airlines flying from Seattle to Hanoi
Compare and see reviews for airlines that fly from Seattle to Hanoi with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $639 | Free Cancellation | Rating 8.2 452 reviews | |||
| PriceFrom $682 | Free Cancellation | Rating 8.1 1,320 reviews | |||
| PriceFrom $717 | Free Cancellation | Rating 8.3 1,503 reviews | |||
| PriceFrom $747 | Free Cancellation | Rating 8.3 747 reviews | |||
| PriceFrom $760 | Free Cancellation | Rating 8.4 1,101 reviews | |||
| PriceFrom $764 | Free Cancellation | Rating 8.0 7,983 reviews | |||
| PriceFrom $802 | Free Cancellation | Rating 9.1 189 reviews | |||
| PriceFrom $808 | Free Cancellation | Rating 8.4 1,214 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Seattle to Hanoi?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to Hanoi. momondo saves you time and could save you money on your trip.
Can I find flights from Seattle to Hanoi with flexible booking policies on momondo?
All flight searches from Seattle to Hanoi on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Seattle to Hanoi?
momondo helps you find the best flight between Seattle and Hanoi by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Seattle to Hanoi right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Hanoi from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.