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Cheap flights from Seattle to Hanoi from $323

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 1/29. 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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Find the cheapest flights from Seattle to Hanoi

Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
10:15 am - 11:30 am
SEA
-
HAN
35h 15m
1 stop
Singapore Airlines Logo
6:30 pm - 8:45 am
HAN
-
SEA
28h 15m
1 stop
$507Singapore Airlines
Thu, May 14 - Mon, May 18
Singapore Airlines Logo
10:15 am - 11:30 am
SEA
-
HAN
35h 15m
1 stop
Singapore Airlines Logo
12:40 pm - 8:45 am
HAN
-
SEA
34h 05m
1 stop
$557Singapore Airlines
Thu, May 21 - Mon, May 25
Singapore Airlines Logo
10:15 am - 5:40 pm
SEA
-
HAN
41h 25m
1 stop
Singapore Airlines Logo
12:40 pm - 8:45 am
HAN
-
SEA
34h 05m
1 stop
$602Singapore Airlines
Thu, Apr 23 - Wed, May 6
Asiana Airlines Logo
12:55 am - 12:15 pm
SEA
-
HAN
21h 20m
1 stop
Asiana Airlines Logo
1:25 pm - 2:55 pm
HAN
-
SEA
15h 30m
1 stop
$622Asiana Airlines
Sun, May 3 - Tue, May 12
Asiana Airlines Logo
12:10 am - 12:10 pm
SEA
-
HAN
21h 00m
1 stop
Asiana Airlines Logo
1:30 pm - 2:55 pm
HAN
-
SEA
15h 25m
1 stop
$627Asiana Airlines
Fri, Mar 6 - Sat, Mar 21
Korean Air Logo
11:00 am - 11:10 am
SEA
-
HAN
33h 10m
1 stop
Korean Air Logo
12:20 pm - 10:00 am
HAN
-
SEA
35h 40m
1 stop
$630Korean Air
Wed, Feb 25 - Tue, Mar 10
Singapore Airlines Logo
10:15 am - 5:40 pm
SEA
-
HAN
41h 25m
1 stop
Singapore Airlines Logo
3:20 pm - 8:45 am
HAN
-
SEA
31h 25m
1 stop
$631Singapore Airlines
Sun, May 10 - Fri, May 15
Korean Air Logo
7:00 am - 9:35 pm
SEA
-
HAN
24h 35m
2 stops
Korean Air Logo
11:10 pm - 10:40 am
HAN
-
SEA
25h 30m
1 stop
$635Korean Air
Mon, May 4 - Tue, May 12
Korean Air Logo
7:00 am - 9:35 pm
SEA
-
HAN
24h 35m
2 stops
Korean Air Logo
11:10 pm - 3:24 pm
HAN
-
SEA
30h 14m
2 stops
$646Korean Air
Mon, May 4 - Tue, May 12
Asiana Airlines Logo
12:10 am - 10:25 pm
SEA
-
HAN
31h 15m
1 stop
Asiana Airlines Logo
1:30 pm - 2:55 pm
HAN
-
SEA
15h 25m
1 stop
$650Asiana Airlines
Sat, Mar 7 - Mon, Mar 16

Singapore Airlines flights from Seattle to Hanoi

Our best Singapore Airlines deals on Seattle to Hanoi flight tickets
Singapore Airlines
May 14
SEA10:15 amSeattle/Tacoma Intl
35h 15m
1 stop
HAN11:30 amHanoi Noibai
May 18
HAN6:30 pmHanoi Noibai
28h 15m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$507
Singapore Airlines
May 21
SEA10:15 amSeattle/Tacoma Intl
35h 15m
1 stop
HAN11:30 amHanoi Noibai
May 25
HAN12:40 pmHanoi Noibai
34h 05m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$557
Singapore Airlines
Apr 23
SEA10:15 amSeattle/Tacoma Intl
41h 25m
1 stop
HAN5:40 pmHanoi Noibai
May 6
HAN12:40 pmHanoi Noibai
34h 05m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$602

Asiana Airlines flights from Seattle to Hanoi

Our best Asiana Airlines deals on Seattle to Hanoi flight tickets
Asiana Airlines
May 3
SEA12:55 amSeattle/Tacoma Intl
21h 20m
1 stop
HAN12:15 pmHanoi Noibai
May 12
HAN1:25 pmHanoi Noibai
15h 30m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$622
Asiana Airlines
Mar 6
SEA12:10 amSeattle/Tacoma Intl
21h 00m
1 stop
HAN12:10 pmHanoi Noibai
Mar 21
HAN1:30 pmHanoi Noibai
15h 25m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$627
Asiana Airlines
Mar 7
SEA12:10 amSeattle/Tacoma Intl
31h 15m
1 stop
HAN10:25 pmHanoi Noibai
Mar 16
HAN1:30 pmHanoi Noibai
15h 25m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$650

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 January 26, 2026.
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

Thu 5/14

10:15 am-11:30 am

1 stop35h 15m

Hanoi Noibai

Mon 5/18

6:30 pm-8:45 am

1 stop28h 15m

$507

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Thu 5/21

10:15 am-11:30 am

1 stop35h 15m

Hanoi Noibai

Mon 5/25

12:40 pm-8:45 am

1 stop34h 05m

$557

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Thu 4/23

10:15 am-5:40 pm

1 stop41h 25m

Hanoi Noibai

Wed 5/6

12:40 pm-8:45 am

1 stop34h 05m

$602

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 5/3

12:55 am-12:15 pm

1 stop21h 20m

Hanoi Noibai

Tue 5/12

1:25 pm-2:55 pm

1 stop15h 30m

$622

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Fri 3/6

12:10 am-12:10 pm

1 stop21h 00m

Hanoi Noibai

Sat 3/21

1:30 pm-2:55 pm

1 stop15h 25m

$627

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Wed 2/25

11:00 am-11:10 am

1 stop33h 10m

Hanoi Noibai

Tue 3/10

12:20 pm-10:00 am

1 stop35h 40m

$630

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sun 5/10

10:15 am-5:40 pm

1 stop41h 25m

Hanoi Noibai

Fri 5/15

3:20 pm-8:45 am

1 stop31h 25m

$631

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Mon 5/4

7:00 am-9:35 pm

2 stops24h 35m

Hanoi Noibai

Tue 5/12

11:10 pm-10:40 am

1 stop25h 30m

$635

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Mon 5/4

7:00 am-9:35 pm

2 stops24h 35m

Hanoi Noibai

Tue 5/12

11:10 pm-3:24 pm

2 stops30h 14m

$646

SeattleHanoi

SEA - HAN

SEAHAN

Seattle/Tacoma Intl

Sat 3/7

12:10 am-10:25 pm

1 stop31h 15m

Hanoi Noibai

Mon 3/16

1:30 pm-2:55 pm

1 stop15h 25m

$650

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 $741, 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 April is your next best option. Flight prices from Seattle to Hanoi during April average around $770.

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 $940 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 12% 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 January 2026, prices for Seattle to Hanoi flights are approximately 9% 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 55m

Direct flights

None
The fastest flight from Seattle to Hanoi takes 18h 55m
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 55m, 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
Korean AirPriceFrom $588Free CancellationRating
8.4
1,188 reviews
Search Korean Air flights
Singapore AirlinesPriceFrom $628Free CancellationRating
8.1
1,437 reviews
Search Singapore Airlines flights
Asiana AirlinesPriceFrom $628Free CancellationRating
8.1
501 reviews
Search Asiana Airlines flights
Philippine AirlinesPriceFrom $638Free CancellationRating
7.3
956 reviews
Search Philippine Airlines flights
China AirlinesPriceFrom $688Free CancellationRating
8.3
802 reviews
Search China Airlines flights
DeltaPriceFrom $728Free CancellationRating
7.9
8,113 reviews
Search Delta flights
STARLUX AirlinesPriceFrom $758Free CancellationRating
8.9
268 reviews
Search STARLUX Airlines flights
EVA AirPriceFrom $765Free CancellationRating
8.4
1,333 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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