Which layover airport offers the lowest fares from Seattle to Hanoi?

Flights via Singapore (SIN) offer the lowest average round-trip price of $628.

Which layover airport has the shortest travel time from Seattle to Hanoi?

Flights connecting via Taipei City (TPE) have the shortest average one-way travel time: 20h 41m.

Which layover airport has the shortest connection time from Seattle to Hanoi?

Incheon (ICN) has the shortest average layover time for this route: 3h 32m.

Which airport is the most popular layover for flights between Seattle and Hanoi?

Incheon (ICN) was the most common stop: 49% of momondo users choosing 1-stop flights on this route connected there.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Hanoi Noibai?

Asiana Airlines and Korean Air are the most popular carriers operating from Seattle/Tacoma Intl to Hanoi Noibai

What airlines fly to Hanoi?

Asiana Airlines, EVA Air and China Airlines 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 31% 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 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 March 2026.

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.

$268 Cheap Flights from Seattle to Hanoi in 2026

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Find the cheapest flights from Seattle to Hanoi

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:15 am - 3:05 pm

SEA

HAN

38h 50m

1 stop

4:00 pm - 8:45 am

HAN

SEA

30h 45m

1 stop

$497Singapore Airlines

Sat, Aug 15 - Wed, Sep 9

10:15 am - 11:30 am

SEA

HAN

35h 15m

1 stop

4:00 pm - 8:45 am

HAN

SEA

30h 45m

1 stop

$520Singapore Airlines

Sat, Aug 15 - Wed, Sep 9

10:15 am - 5:40 pm

SEA

HAN

41h 25m

1 stop

12:40 pm - 8:45 am

HAN

SEA

34h 05m

1 stop

$540Singapore Airlines

Fri, Aug 14 - Sat, Sep 19

10:15 am - 11:30 am

SEA

HAN

35h 15m

1 stop

4:00 pm - 8:45 am

HAN

SEA

30h 45m

1 stop

$545Singapore Airlines

Fri, Aug 14 - Sat, Sep 19

10:15 am - 11:30 am

SEA

HAN

35h 15m

1 stop

4:00 pm - 8:45 am

HAN

SEA

30h 45m

1 stop

$546Singapore Airlines

Thu, Sep 10 - Sat, Sep 19

12:55 am - 10:00 pm

SEA

HAN

31h 05m

1 stop

11:30 pm - 2:55 pm

HAN

SEA

29h 25m

1 stop

$589Asiana Airlines

Mon, Aug 31 - Mon, Sep 7

12:55 am - 10:00 pm

SEA

HAN

31h 05m

1 stop

11:30 pm - 2:55 pm

HAN

SEA

29h 25m

1 stop

$616Asiana Airlines

Tue, Apr 14 - Mon, Jun 15

12:55 am - 12:15 pm

SEA

HAN

21h 20m

1 stop

11:30 pm - 2:55 pm

HAN

SEA

29h 25m

1 stop

$620Asiana Airlines

Sun, Aug 30 - Sun, Sep 6

12:55 am - 12:15 pm

SEA

HAN

21h 20m

1 stop

11:30 pm - 2:55 pm

HAN

SEA

29h 25m

1 stop

$625Asiana Airlines

Thu, Aug 13 - Sun, Sep 20

1:05 pm - 9:35 pm

SEA

HAN

18h 30m

1 stop

11:10 pm - 1:37 pm

HAN

SEA

28h 27m

1 stop

$626Delta

Wed, Aug 12 - Mon, Sep 7

Asiana Airlines flights from Seattle to Hanoi

Our best Asiana Airlines deals on Seattle to Hanoi flight tickets

Asiana Airlines

Apr 6

SEA12:55 amSeattle/Tacoma Intl

31h 05m

1 stop

HAN10:00 pmHanoi Noibai

Sep 8

HAN1:25 pmHanoi Noibai

15h 30m

1 stop

SEA2:55 pmSeattle/Tacoma Intl

$589

Asiana Airlines

Apr 14

SEA12:55 amSeattle/Tacoma Intl

31h 05m

1 stop

HAN10:00 pmHanoi Noibai

Jun 15

HAN11:30 pmHanoi Noibai

29h 25m

1 stop

SEA2:55 pmSeattle/Tacoma Intl

$616

Asiana Airlines

Aug 30

SEA12:55 amSeattle/Tacoma Intl

21h 20m

1 stop

HAN12:15 pmHanoi Noibai

Sep 6

HAN11:30 pmHanoi Noibai

29h 25m

1 stop

SEA2:55 pmSeattle/Tacoma Intl

$620

Delta flights from Seattle to Hanoi

Our best Delta deals on Seattle to Hanoi flight tickets

Delta

Aug 12

SEA1:05 pmSeattle/Tacoma Intl

18h 30m

1 stop

HAN9:35 pmHanoi Noibai

Sep 1

HAN11:10 pmHanoi Noibai

28h 27m

1 stop

SEA1:37 pmSeattle/Tacoma Intl

$626

Delta

Aug 16

SEA1:05 pmSeattle/Tacoma Intl

31h 30m

1 stop

HAN10:35 amHanoi Noibai

Sep 8

HAN11:10 pmHanoi Noibai

28h 27m

1 stop

SEA1:37 pmSeattle/Tacoma Intl

$706

Delta

Apr 23

SEA1:00 pmSeattle/Tacoma Intl

18h 35m

1 stop

HAN9:35 pmHanoi Noibai

May 29

HAN11:10 pmHanoi Noibai

28h 01m

1 stop

SEA1:11 pmSeattle/Tacoma Intl

$716

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sat 8/15

10:15 am-3:05 pm

1 stop38h 50m

Hanoi Noibai

Wed 9/9

4:00 pm-8:45 am

1 stop30h 45m

$497

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sat 8/15

10:15 am-11:30 am

1 stop35h 15m

Hanoi Noibai

Wed 9/9

4:00 pm-8:45 am

1 stop30h 45m

$520

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Fri 8/14

10:15 am-5:40 pm

1 stop41h 25m

Hanoi Noibai

Sat 9/19

12:40 pm-8:45 am

1 stop34h 05m

$540

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Fri 8/14

10:15 am-11:30 am

1 stop35h 15m

Hanoi Noibai

Sat 9/19

4:00 pm-8:45 am

1 stop30h 45m

$545

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Thu 9/10

10:15 am-11:30 am

1 stop35h 15m

Hanoi Noibai

Sat 9/19

4:00 pm-8:45 am

1 stop30h 45m

$546

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Mon 8/31

12:55 am-10:00 pm

1 stop31h 05m

Hanoi Noibai

Mon 9/7

11:30 pm-2:55 pm

1 stop29h 25m

$589

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Tue 4/14

12:55 am-10:00 pm

1 stop31h 05m

Hanoi Noibai

Mon 6/15

11:30 pm-2:55 pm

1 stop29h 25m

$616

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 8/30

12:55 am-12:15 pm

1 stop21h 20m

Hanoi Noibai

Sun 9/6

11:30 pm-2:55 pm

1 stop29h 25m

$620

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Thu 8/13

12:55 am-12:15 pm

1 stop21h 20m

Hanoi Noibai

Sun 9/20

11:30 pm-2:55 pm

1 stop29h 25m

$625

Quickest round-trip

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 8/12

1:05 pm-9:35 pm

1 stop18h 30m

Hanoi Noibai

Mon 9/7

11:10 pm-1:37 pm

1 stop28h 27m

$626

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

What is the cheapest month to fly to Hanoi?

The cheapest month to fly to Hanoi from Seattle is in September. Flight prices, which tend to average around $732, are often lower during this time because this is during the off-season. If you’re not able to fly to Hanoi in September, then March is your next best option. Flight prices from Seattle to Hanoi during March average around $768.

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 $924 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 $602 on momondo.

Can stopping save me money on Seattle to Hanoi flights?

You could potentially save up to 31% 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 March 2026, prices for Seattle to Hanoi flights are approximately 26% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Hanoi

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Hanoi according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

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

Fastest flight time	18h 30m
Direct flights	None

The fastest flight from Seattle to Hanoi takes 18h 30m

There are no direct flights from Seattle to Hanoi. There are no popular flight routes from Seattle to Hanoi.

Search flight deals

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 18h 30m, 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 March 2026.
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 (24% of total bookings). The next most popular airlines are EVA Air (24%), China Airlines (17%), and STARLUX Airlines (15%).

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
Delta	PriceFrom $400	Free Cancellation	Rating 7.9 8,324 reviews	Search Delta flights
Singapore Airlines	PriceFrom $526	Free Cancellation	Rating 8.2 1,484 reviews	Search Singapore Airlines flights
Korean Air	PriceFrom $588	Free Cancellation	Rating 8.4 1,202 reviews	Search Korean Air flights
Asiana Airlines	PriceFrom $622	Free Cancellation	Rating 8.1 506 reviews	Search Asiana Airlines flights
China Airlines	PriceFrom $633	Free Cancellation	Rating 8.3 817 reviews	Search China Airlines flights
Philippine Airlines	PriceFrom $638	Free Cancellation	Rating 7.3 971 reviews	Search Philippine Airlines flights
STARLUX Airlines	PriceFrom $758	Free Cancellation	Rating 9.0 292 reviews	Search STARLUX Airlines flights
EVA Air	PriceFrom $765	Free Cancellation	Rating 8.5 1,390 reviews	Search EVA Air flights

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.