$320 Cheap Flights from Seattle (SEA) to Hanoi (HAN)

View $320 flight on Sun, Mar 22, 2026Opens 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 $320 for one-way flights and $610 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Singapore Airlines
Sun, Feb 1 - Wed, Feb 11
SEA
Seattle
HAN
Hanoi
$610 Roundtrip, found 1 day ago
$610
Roundtrip
found 1 day ago
Select Singapore Airlines flight, departing Sun, Feb 1 from Seattle to Hanoi, returning Wed, Feb 11, priced at $610 found 1 day ago
Philippine Airlines
Sun, Nov 23 - Thu, Nov 27
SEA
Seattle
HAN
Hanoi
$691 Roundtrip, found 1 day ago
$691
Roundtrip
found 1 day ago
Select Philippine Airlines flight, departing Sun, Nov 23 from Seattle to Hanoi, returning Thu, Nov 27, priced at $691 found 1 day ago
Asiana Airlines
Mon, Mar 2 - Thu, Mar 12
SEA
Seattle
HAN
Hanoi
$691 Roundtrip, just found
$691
Roundtrip
just found
Select Asiana Airlines flight, departing Mon, Mar 2 from Seattle to Hanoi, returning Thu, Mar 12, priced at $691 just found
Cathay Pacific
Wed, Apr 15 - Wed, May 13
SEA
Seattle
HAN
Hanoi
$700 Roundtrip, found 22 hours ago
$700
Roundtrip
found 22 hours ago
Select Cathay Pacific flight, departing Wed, Apr 15 from Seattle to Hanoi, returning Wed, May 13, priced at $700 found 22 hours ago
Delta
Tue, Mar 24 - Tue, Apr 7
SEA
Seattle
HAN
Hanoi
$701 Roundtrip, found 4 hours ago
$701
Roundtrip
found 4 hours ago
Select Delta flight, departing Tue, Mar 24 from Seattle to Hanoi, returning Tue, Apr 7, priced at $701 found 4 hours ago
Korean Air
Tue, Mar 31 - Mon, Apr 20
SEA
Seattle
HAN
Hanoi
$704 Roundtrip, found 2 days ago
$704
Roundtrip
found 2 days ago
Select Korean Air flight, departing Tue, Mar 31 from Seattle to Hanoi, returning Mon, Apr 20, priced at $704 found 2 days ago
China Airlines
Wed, Nov 12 - Thu, Nov 27
SEA
Seattle
HAN
Hanoi
$748 Roundtrip, found 15 hours ago
$748
Roundtrip
found 15 hours ago
Select China Airlines flight, departing Wed, Nov 12 from Seattle to Hanoi, returning Thu, Nov 27, priced at $748 found 15 hours ago
All Nippon Airways
Wed, Dec 31 - Wed, Jan 28
SEA
Seattle
HAN
Hanoi
$787 Roundtrip, found 1 day ago
$787
Roundtrip
found 1 day ago
Select All Nippon Airways flight, departing Wed, Dec 31 from Seattle to Hanoi, returning Wed, Jan 28, priced at $787 found 1 day ago
STARLUX Airlines
Mon, Mar 2 - Thu, Mar 12
SEA
Seattle
HAN
Hanoi
$819 Roundtrip, just found
$819
Roundtrip
just found
Select STARLUX Airlines flight, departing Mon, Mar 2 from Seattle to Hanoi, returning Thu, Mar 12, priced at $819 just found
EVA Airways
Thu, Mar 26 - Thu, Apr 9
SEA
Seattle
HAN
Hanoi
$825 Roundtrip, found 1 hour ago
$825
Roundtrip
found 1 hour ago
Select EVA Airways flight, departing Thu, Mar 26 from Seattle to Hanoi, returning Thu, Apr 9, priced at $825 found 1 hour ago

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

February is typically the cheapest month to fly

From $676 - $1,086 per traveler.

Alternative airports near Hanoi

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Noi Bai Intl. HAN. Cheapest and Closest option available. Average driving time to city center is 24 minutes. Flights from $759
HAN
Noi Bai Intl.
CheapestClosest
Average driving time to city center24 min
Flights from $759
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, British Airways, Cathay Pacific, China Airlines, Delta, EVA Airways, Emirates, Japan Airlines, Korean Air, Philippine Airlines, Qatar Airways, STARLUX Airlines, Singapore Airlines, Turkish Airlines, United
Roundtrip price
$610
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 February. 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 $320 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?
Grab a cheap one-way flight from $320 or cheap return flight from $610 from Seattle - Tacoma Intl. Airport (SEA) to Noi Bai Intl. Airport (HAN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Noi Bai Intl. Airport (HAN)?
Traveling in February is a great way to save, as it's the cheapest month for flights between SEA and HAN. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Noi Bai Intl. Airport (HAN)?
To find the cheapest airline flying from SEA to HAN, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
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.