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Cheap flights from Seattle to Hanoi from $316

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 8/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Philippine Airlines Logo
9:30 pm - 1:50 amSEA-HAN
37h 20m1 stop
Philippine Airlines Logo
2:50 am - 6:35 pmHAN-SEA
30h 45m1 stop
$628Philippine Airlines
Find Deal
Tue, Jan 6 - Wed, Jan 21
Philippine Airlines Logo
9:30 pm - 1:50 amSEA-HAN
37h 20m1 stop
Philippine Airlines Logo
2:45 pm - 6:35 pmHAN-SEA
18h 50m1 stop
$631Philippine Airlines
Find Deal
Tue, Jan 6 - Thu, Jan 22
Philippine Airlines Logo
10:30 pm - 1:50 amSEA-HAN
37h 20m1 stop
Philippine Airlines Logo
2:50 am - 6:35 pmHAN-SEA
30h 45m1 stop
$650Philippine Airlines
Find Deal
Sun, Oct 26 - Tue, Nov 18
Asiana Airlines Logo
2:15 pm - 10:00 pmSEA-HAN
17h 45m1 stop
Asiana Airlines Logo
11:30 pm - 12:30 pmHAN-SEA
27h 00m1 stop
$655Asiana Airlines
Find Deal
Mon, Sep 15 - Mon, Sep 22
Asiana Airlines Logo
2:15 pm - 12:15 pmSEA-HAN
32h 00m1 stop
Asiana Airlines Logo
1:25 pm - 12:30 pmHAN-SEA
37h 05m1 stop
$657Asiana Airlines
Find Deal
Sun, Oct 5 - Sat, Oct 18
China Airlines Logo
1:40 am - 4:50 pmSEA-HAN
25h 10m1 stop
China Airlines Logo
11:35 am - 7:20 pmHAN-SEA
21h 45m1 stop
$724China Airlines
Find Deal
Sun, Sep 14 - Mon, Sep 22
China Airlines Logo
1:10 am - 10:35 amSEA-HAN
19h 25m1 stop
China Airlines Logo
5:30 pm - 6:10 pmHAN-SEA
15h 40m1 stop
$727China Airlines
Find Deal
Mon, Oct 27 - Tue, Nov 18
Korean Air Logo
12:00 pm - 9:40 pmSEA-HAN
19h 40m1 stop
Korean Air Logo
12:20 pm - 9:00 amHAN-SEA
35h 40m1 stop
$732Korean Air
Find Deal
Wed, Oct 29 - Wed, Nov 19
Korean Air Logo
12:45 pm - 11:10 amSEA-HAN
32h 25m2 stops
Korean Air Logo
11:00 pm - 9:00 amHAN-SEA
25h 00m1 stop
$738Korean Air
Find Deal
Mon, Oct 27 - Mon, Nov 17
STARLUX Airlines Logo
1:15 am - 10:10 amSEA-HAN
18h 55m1 stop
STARLUX Airlines Logo
5:50 pm - 4:10 pmHAN-SEA
36h 20m1 stop
$790STARLUX Airlines
Find Deal
Sun, Aug 31 - Wed, Apr 1

Philippine Airlines flights from Seattle to Hanoi

Our best Philippine Airlines deals on Seattle to Hanoi flight tickets
Philippine Airlines
Jan 6
SEA9:30 pmSeattle/Tacoma Intl
37h 20m
1 stop
HAN1:50 amHanoi Noibai
Jan 21
HAN2:50 amHanoi Noibai
30h 45m
1 stop
SEA6:35 pmSeattle/Tacoma Intl
$628
Find similar
Philippine Airlines
Jan 6
SEA9:30 pmSeattle/Tacoma Intl
37h 20m
1 stop
HAN1:50 amHanoi Noibai
Jan 22
HAN2:45 pmHanoi Noibai
18h 50m
1 stop
SEA6:35 pmSeattle/Tacoma Intl
$631
Find similar
Philippine Airlines
Oct 26
SEA10:30 pmSeattle/Tacoma Intl
37h 20m
1 stop
HAN1:50 amHanoi Noibai
Nov 18
HAN2:50 amHanoi Noibai
30h 45m
1 stop
SEA6:35 pmSeattle/Tacoma Intl
$650
Find similar

Asiana Airlines flights from Seattle to Hanoi

Our best Asiana Airlines deals on Seattle to Hanoi flight tickets
Asiana Airlines
Sep 15
SEA2:15 pmSeattle/Tacoma Intl
17h 45m
1 stop
HAN10:00 pmHanoi Noibai
Sep 22
HAN11:30 pmHanoi Noibai
27h 00m
1 stop
SEA12:30 pmSeattle/Tacoma Intl
$655
Find similar
Asiana Airlines
Oct 5
SEA2:15 pmSeattle/Tacoma Intl
32h 00m
1 stop
HAN12:15 pmHanoi Noibai
Oct 18
HAN1:25 pmHanoi Noibai
37h 05m
1 stop
SEA12:30 pmSeattle/Tacoma Intl
$657
Find similar
Asiana Airlines
Sep 1
SEA2:15 pmSeattle/Tacoma Intl
32h 00m
1 stop
HAN12:15 pmHanoi Noibai
Apr 1
HAN11:30 pmHanoi Noibai
29h 25m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$658
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated August 20, 2025.
Use the filters below to find and compare flights from Seattle to Hanoi that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Tue 1/6

9:30 pm-1:50 am

1 stop37h 20m

Hanoi Noibai

Wed 1/21

2:50 am-6:35 pm

1 stop30h 45m

$628

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Tue 1/6

9:30 pm-1:50 am

1 stop37h 20m

Hanoi Noibai

Thu 1/22

2:45 pm-6:35 pm

1 stop18h 50m

$631

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 10/26

10:30 pm-1:50 am

1 stop37h 20m

Hanoi Noibai

Tue 11/18

2:50 am-6:35 pm

1 stop30h 45m

$650

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Mon 9/15

2:15 pm-10:00 pm

1 stop17h 45m

Hanoi Noibai

Mon 9/22

11:30 pm-12:30 pm

1 stop27h 00m

$655

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 10/5

2:15 pm-12:15 pm

1 stop32h 00m

Hanoi Noibai

Sat 10/18

1:25 pm-12:30 pm

1 stop37h 05m

$657

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 9/14

1:40 am-4:50 pm

1 stop25h 10m

Hanoi Noibai

Mon 9/22

11:35 am-7:20 pm

1 stop21h 45m

$724

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Mon 10/27

1:10 am-10:35 am

1 stop19h 25m

Hanoi Noibai

Tue 11/18

5:30 pm-6:10 pm

1 stop15h 40m

$727

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 10/29

12:00 pm-9:40 pm

1 stop19h 40m

Hanoi Noibai

Wed 11/19

12:20 pm-9:00 am

1 stop35h 40m

$732

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Mon 10/27

12:45 pm-11:10 am

2 stops32h 25m

Hanoi Noibai

Mon 11/17

11:00 pm-9:00 am

1 stop25h 00m

$738

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 8/31

1:15 am-10:10 am

1 stop18h 55m

Hanoi Noibai

Wed 4/1

5:50 pm-4:10 pm

1 stop36h 20m

$790

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Hanoi from

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 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 $774, 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 September is your next best option. Flight prices from Seattle to Hanoi during September average around $775.

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 $958 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 $745 on momondo.

Can stopping save me money on Seattle to Hanoi flights?

You could potentially save up to 21% 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 August 2025, prices for Seattle to Hanoi flights are approximately 32% 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

Direct flights

None
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 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?

  • 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?

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
Asiana AirlinesPriceFrom $639Free CancellationRating
8.2
475 reviews
Search Asiana Airlines flights
Singapore AirlinesPriceFrom $682Free CancellationRating
8.1
1,347 reviews
Search Singapore Airlines flights
Japan AirlinesPriceFrom $717Free CancellationRating
8.3
1,550 reviews
Search Japan Airlines flights
Korean AirPriceFrom $732Free CancellationRating
8.4
1,131 reviews
Search Korean Air flights
China AirlinesPriceFrom $747Free CancellationRating
8.3
764 reviews
Search China Airlines flights
DeltaPriceFrom $764Free CancellationRating
7.9
7,982 reviews
Search Delta flights
STARLUX AirlinesPriceFrom $802Free CancellationRating
9.0
207 reviews
Search STARLUX Airlines flights
EVA AirPriceFrom $808Free CancellationRating
8.4
1,232 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.

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