$386 Cheap Flights from Seattle (SEA) to Hanoi (HAN)

View $386 flight on Wed, Aug 13, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Noi Bai Intl. Airport (HAN)

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Cheap Flights from Seattle to Hanoi (SEA-HAN)

Prices were available within the past 7 days and start at $386 for one-way flights and $695 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Sep 18 - Wed, Sep 24
SEA
Seattle
HAN
Hanoi
$695 Roundtrip, found 2 days ago
$695
Roundtrip
found 2 days ago
Select United flight, departing Thu, Sep 18 from Seattle to Hanoi, returning Wed, Sep 24, priced at $695 found 2 days ago
Philippine Airlines
Wed, Feb 18 - Wed, Feb 25
SEA
Seattle
HAN
Hanoi
$719 Roundtrip, found 10 hours ago
$719
Roundtrip
found 10 hours ago
Select Philippine Airlines flight, departing Wed, Feb 18 from Seattle to Hanoi, returning Wed, Feb 25, priced at $719 found 10 hours ago
All Nippon Airways
Tue, Sep 16 - Wed, Oct 1
SEA
Seattle
HAN
Hanoi
$727 Roundtrip, found 2 days ago
$727
Roundtrip
found 2 days ago
Select All Nippon Airways flight, departing Tue, Sep 16 from Seattle to Hanoi, returning Wed, Oct 1, priced at $727 found 2 days ago
Delta
Tue, Oct 21 - Tue, Nov 18
SEA
Seattle
HAN
Hanoi
$729 Roundtrip, found 17 hours ago
$729
Roundtrip
found 17 hours ago
Select Delta flight, departing Tue, Oct 21 from Seattle to Hanoi, returning Tue, Nov 18, priced at $729 found 17 hours ago
Korean Air
Mon, Sep 15 - Mon, Sep 22
SEA
Seattle
HAN
Hanoi
$733 Roundtrip, found 2 days ago
$733
Roundtrip
found 2 days ago
Select Korean Air flight, departing Mon, Sep 15 from Seattle to Hanoi, returning Mon, Sep 22, priced at $733 found 2 days ago
China Airlines
Wed, Jan 7 - Thu, Feb 5
SEA
Seattle
HAN
Hanoi
$751 Roundtrip, found 20 hours ago
$751
Roundtrip
found 20 hours ago
Select China Airlines flight, departing Wed, Jan 7 from Seattle to Hanoi, returning Thu, Feb 5, priced at $751 found 20 hours ago
Asiana Airlines
Mon, Apr 13 - Mon, Apr 27
SEA
Seattle
HAN
Hanoi
$767 Roundtrip, found 3 hours ago
$767
Roundtrip
found 3 hours ago
Select Asiana Airlines flight, departing Mon, Apr 13 from Seattle to Hanoi, returning Mon, Apr 27, priced at $767 found 3 hours ago
STARLUX Airlines
Thu, Oct 2 - Tue, Oct 14
SEA
Seattle
HAN
Hanoi
$830 Roundtrip, found 6 days ago
$830
Roundtrip
found 6 days ago
Select STARLUX Airlines flight, departing Thu, Oct 2 from Seattle to Hanoi, returning Tue, Oct 14, priced at $830 found 6 days ago
EVA Airways
Tue, Jan 20 - Thu, Feb 5
SEA
Seattle
HAN
Hanoi
$857 Roundtrip, found 6 hours ago
$857
Roundtrip
found 6 hours ago
Select EVA Airways flight, departing Tue, Jan 20 from Seattle to Hanoi, returning Thu, Feb 5, priced at $857 found 6 hours ago
Japan Airlines
Wed, Sep 3 - Tue, Sep 9
SEA
Seattle
HAN
Hanoi
$865 Roundtrip, found 2 days ago
$865
Roundtrip
found 2 days ago
Select Japan Airlines flight, departing Wed, Sep 3 from Seattle to Hanoi, returning Tue, Sep 9, priced at $865 found 2 days ago

Find the cheapest month to fly from Seattle (SEA) to Hanoi (HAN)

February is typically the cheapest month to fly

From $676 - $1,012 per traveler.

Graph displaying average flight prices per month

Flights from Seattle (SEA) to Hanoi (HAN)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Noi Bai Intl.
Airlines serving
Air Canada, Air France, Alaska Airlines, All Nippon Airways, American Airlines, Asiana Airlines, Cathay Pacific, China Airlines, Delta, EVA Airways, Emirates, Japan Airlines, Korean Air, Lufthansa, Malaysia Airlines, Philippine Airlines, Qatar Airways, STARLUX Airlines, Turkish Airlines, United
Roundtrip price
$694
Distance
6832 mi

Seattle to Hanoi Flights

The cheapest times to fly from Seattle to Hanoi

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Hanoi are during the month of September. You can find some of the cheapest flights from Seattle to Hanoi with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Hanoi

Sunday is one of the best days to book for cheap flights from Seattle to Hanoi: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Hanoi

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Hanoi in 2025. You can also book with separate airlines for your outbound and return journeys, from $386 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Hanoi flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Hanoi airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Noi Bai Intl. Airport (HAN) cost?
Discover the latest flight deals from SEA to HAN by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SEA to HAN?
The cheapest flights from SEA to HAN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SEA to HAN?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SEA to HAN. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Noi Bai Intl. Airport (HAN)?
You'll have to take a flight with a layover when traveling from Seattle - Tacoma Intl. Airport (SEA) to Noi Bai Intl. Airport (HAN). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from SEA to HAN?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary depending on various factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Noi Bai Intl. Airport (HAN)?
To avoid potential delays on the Seattle - Tacoma Intl. Airport (SEA) to Noi Bai Intl. Airport (HAN) route, aim to travel before 3 PM. Later flights are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Noi Bai Intl. Airport (HAN) last-minute?
Holding off until just before your trip to book a flight from SEA to HAN often results in higher prices. Although you may find some last-minute deals, they're not always guaranteed. Be flexible with your itinerary to maximize your chances of getting a bargain.
Is it cheaper to book a SEA to HAN flight and hotel package?
Compared with arranging flights and hotels separately, booking a SEA to HAN flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one convenient place will take the stress out of travel planning. Just secure your flights and select from our extensive range of stays, then personalize your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Noi Bai Intl. Airport (HAN)?
You can usually cancel or reschedule your SEA to HAN flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.