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Cheap flights from Seattle to Hanoi from $305

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 3/21. 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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0 bags

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Find the cheapest flights from Seattle to Hanoi

Cheap round-trip flights

Enter your travel dates to find the best prices.
Korean Air Logo
11:00 am - 9:45 pm
SEA
-
HAN
19h 45m1 stop
Korean Air Logo
12:20 pm - 9:00 am
HAN
-
SEA
35h 40m1 stop
$650Korean Air
Sun, Jan 25 - Sun, Feb 1
Philippine Airlines Logo
10:30 pm - 1:45 am
SEA
-
HAN
37h 15m1 stop
Philippine Airlines Logo
2:15 pm - 8:05 pm
HAN
-
SEA
19h 50m1 stop
$655Philippine Airlines
Thu, Mar 19 - Thu, Apr 9
Asiana Airlines Logo
12:10 am - 12:10 pm
SEA
-
HAN
21h 00m1 stop
Asiana Airlines Logo
11:50 pm - 2:55 pm
HAN
-
SEA
29h 05m1 stop
$656Asiana Airlines
Sat, Feb 28 - Thu, Mar 19
Asiana Airlines Logo
12:10 am - 12:10 pm
SEA
-
HAN
22h 00m1 stop
Asiana Airlines Logo
1:25 pm - 2:55 pm
HAN
-
SEA
15h 30m1 stop
$660Asiana Airlines
Mon, Mar 16 - Thu, Apr 9
Korean Air Logo
12:00 pm - 9:45 pm
SEA
-
HAN
19h 45m1 stop
Korean Air Logo
12:00 pm - 10:40 am
HAN
-
SEA
36h 40m1 stop
$669Korean Air
Mon, Mar 16 - Tue, Apr 7
Korean Air Logo
12:50 pm - 9:35 pm
SEA
-
HAN
18h 45m1 stop
Korean Air Logo
11:10 pm - 10:40 am
HAN
-
SEA
25h 30m1 stop
$672Korean Air
Sun, Apr 12 - Sun, Apr 26
Korean Air Logo
7:15 am - 9:45 pm
SEA
-
HAN
24h 30m2 stops
Korean Air Logo
12:00 pm - 10:40 am
HAN
-
SEA
36h 40m1 stop
$674Korean Air
Mon, Mar 16 - Tue, Apr 7
Philippine Airlines Logo
10:30 pm - 1:45 am
SEA
-
HAN
37h 15m1 stop
Philippine Airlines Logo
1:45 am - 8:05 pm
HAN
-
SEA
32h 20m1 stop
$682Philippine Airlines
Sun, Mar 15 - Wed, Apr 8
Asiana Airlines Logo
12:10 am - 10:25 pm
SEA
-
HAN
31h 15m1 stop
Asiana Airlines Logo
11:50 pm - 1:55 pm
HAN
-
SEA
29h 05m1 stop
$684Asiana Airlines
Sat, Jan 17 - Tue, Jan 27
Korean Air Logo
8:10 pm - 9:45 pm
SEA
-
HAN
34h 35m2 stops
Korean Air Logo
11:05 pm - 4:54 pm
HAN
-
SEA
32h 49m2 stops
$685Korean Air
Sun, Jan 25 - Sun, Feb 1

STARLUX Airlines flights from Seattle to Hanoi

Our best STARLUX Airlines deals on Seattle to Hanoi flight tickets
STARLUX Airlines
Dec 16
SEA11:45 pmSeattle/Tacoma Intl
26h 40m
1 stop
HAN5:25 pmHanoi Noibai
Dec 26
HAN11:30 amHanoi Noibai
18h 35m
1 stop
SEA3:05 pmSeattle/Tacoma Intl
$1,672
Find similar
STARLUX Airlines
Dec 24
SEA11:45 pmSeattle/Tacoma Intl
19h 45m
1 stop
HAN10:30 amHanoi Noibai
Dec 31
HAN6:25 pmHanoi Noibai
35h 40m
1 stop
SEA3:05 pmSeattle/Tacoma Intl
$2,026
Find similar

Cathay Pacific flights from Seattle to Hanoi

Our best Cathay Pacific deals on Seattle to Hanoi flight tickets
Cathay Pacific
Dec 16
SEA3:48 pmSeattle/Tacoma Intl
27h 17m
2 stops
HAN10:05 amHanoi Noibai
Dec 26
HAN11:05 amHanoi Noibai
22h 45m
2 stops
SEA6:50 pmSeattle/Tacoma Intl
$1,647
Find similar
Cathay Pacific
Dec 16
SEA4:59 pmSeattle/Tacoma Intl
34h 31m
2 stops
HAN6:30 pmHanoi Noibai
Dec 26
HAN11:05 amHanoi Noibai
22h 45m
2 stops
SEA6:50 pmSeattle/Tacoma Intl
$2,076
Find similar
Cathay Pacific
Dec 16
SEA3:48 pmSeattle/Tacoma Intl
27h 17m
2 stops
HAN10:05 amHanoi Noibai
Dec 29
HAN7:30 pmHanoi Noibai
34h 41m
2 stops
SEA3:11 pmSeattle/Tacoma Intl
$2,177
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 December 11, 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

Sun 1/25

11:00 am-9:45 pm

1 stop19h 45m

Hanoi Noibai

Sun 2/1

12:20 pm-9:00 am

1 stop35h 40m

$650

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Thu 3/19

10:30 pm-1:45 am

1 stop37h 15m

Hanoi Noibai

Thu 4/9

2:15 pm-8:05 pm

1 stop19h 50m

$655

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sat 2/28

12:10 am-12:10 pm

1 stop21h 00m

Hanoi Noibai

Thu 3/19

11:50 pm-2:55 pm

1 stop29h 05m

$656

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Mon 3/16

12:10 am-12:10 pm

1 stop22h 00m

Hanoi Noibai

Thu 4/9

1:25 pm-2:55 pm

1 stop15h 30m

$660

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Mon 3/16

12:00 pm-9:45 pm

1 stop19h 45m

Hanoi Noibai

Tue 4/7

12:00 pm-10:40 am

1 stop36h 40m

$669

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 4/12

12:50 pm-9:35 pm

1 stop18h 45m

Hanoi Noibai

Sun 4/26

11:10 pm-10:40 am

1 stop25h 30m

$672

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Mon 3/16

7:15 am-9:45 pm

2 stops24h 30m

Hanoi Noibai

Tue 4/7

12:00 pm-10:40 am

1 stop36h 40m

$674

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 3/15

10:30 pm-1:45 am

1 stop37h 15m

Hanoi Noibai

Wed 4/8

1:45 am-8:05 pm

1 stop32h 20m

$682

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sat 1/17

12:10 am-10:25 pm

1 stop31h 15m

Hanoi Noibai

Tue 1/27

11:50 pm-1:55 pm

1 stop29h 05m

$684

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 1/25

8:10 pm-9:45 pm

2 stops34h 35m

Hanoi Noibai

Sun 2/1

11:05 pm-4:54 pm

2 stops32h 49m

$685

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 September. Flight prices, which tend to average around $747, 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 February is your next best option. Flight prices from Seattle to Hanoi during February 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 $946 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 $732 on momondo.

Can stopping save me money on Seattle to Hanoi flights?

You could potentially save up to 8% 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 December 2025, prices for Seattle to Hanoi flights are approximately 21% 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

19h 45m

Direct flights

None
The fastest flight from Seattle to Hanoi takes 19h 45m
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 19h 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
Singapore AirlinesPriceFrom $628Free CancellationRating
8.1
1,412 reviews
Search Singapore Airlines flights
Asiana AirlinesPriceFrom $637Free CancellationRating
8.2
492 reviews
Search Asiana Airlines flights
Philippine AirlinesPriceFrom $652Free CancellationRating
7.3
941 reviews
Search Philippine Airlines flights
Korean AirPriceFrom $704Free CancellationRating
8.4
1,184 reviews
Search Korean Air flights
China AirlinesPriceFrom $707Free CancellationRating
8.2
788 reviews
Search China Airlines flights
DeltaPriceFrom $764Free CancellationRating
7.9
8,005 reviews
Search Delta flights
STARLUX AirlinesPriceFrom $771Free CancellationRating
8.9
243 reviews
Search STARLUX Airlines flights
EVA AirPriceFrom $783Free CancellationRating
8.4
1,296 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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