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

View $320 flight on Tue, Jan 20, 2026Opens in a new window

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

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 $582 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Singapore Airlines
Tue, Jan 20 - Thu, Feb 5
SEA
Seattle
HAN
Hanoi
$582 Roundtrip, found 8 hours ago
$582
Roundtrip
found 8 hours ago
Select Singapore Airlines flight, departing Tue, Jan 20 from Seattle to Hanoi, returning Thu, Feb 5, priced at $582 found 8 hours ago
Philippine Airlines
Thu, Feb 19 - Thu, Feb 26
SEA
Seattle
HAN
Hanoi
$669 Roundtrip, found 4 hours ago
$669
Roundtrip
found 4 hours ago
Select Philippine Airlines flight, departing Thu, Feb 19 from Seattle to Hanoi, returning Thu, Feb 26, priced at $669 found 4 hours ago
Asiana Airlines
Mon, Feb 2 - Mon, Feb 23
SEA
Seattle
HAN
Hanoi
$691 Roundtrip, just found
$691
Roundtrip
just found
Select Asiana Airlines flight, departing Mon, Feb 2 from Seattle to Hanoi, returning Mon, Feb 23, priced at $691 just found
Delta
Mon, Nov 10 - Tue, Nov 25
SEA
Seattle
HAN
Hanoi
$729 Roundtrip, found 3 hours ago
$729
Roundtrip
found 3 hours ago
Select Delta flight, departing Mon, Nov 10 from Seattle to Hanoi, returning Tue, Nov 25, priced at $729 found 3 hours ago
Korean Air
Mon, Oct 20 - Mon, Nov 10
SEA
Seattle
HAN
Hanoi
$732 Roundtrip, found 4 days ago
$732
Roundtrip
found 4 days ago
Select Korean Air flight, departing Mon, Oct 20 from Seattle to Hanoi, returning Mon, Nov 10, priced at $732 found 4 days ago
United
Tue, Sep 16 - Tue, Oct 14
SEA
Seattle
HAN
Hanoi
$755 Roundtrip, found 1 day ago
$755
Roundtrip
found 1 day ago
Select United flight, departing Tue, Sep 16 from Seattle to Hanoi, returning Tue, Oct 14, priced at $755 found 1 day ago
China Airlines
Mon, Nov 10 - Tue, Nov 25
SEA
Seattle
HAN
Hanoi
$774 Roundtrip, found 3 hours ago
$774
Roundtrip
found 3 hours ago
Select China Airlines flight, departing Mon, Nov 10 from Seattle to Hanoi, returning Tue, Nov 25, priced at $774 found 3 hours ago
EVA Airways
Wed, Oct 8 - Thu, Oct 30
SEA
Seattle
HAN
Hanoi
$825 Roundtrip, found 1 hour ago
$825
Roundtrip
found 1 hour ago
Select EVA Airways flight, departing Wed, Oct 8 from Seattle to Hanoi, returning Thu, Oct 30, priced at $825 found 1 hour ago
STARLUX Airlines
Tue, Jan 6 - Fri, Jan 16
SEA
Seattle
HAN
Hanoi
$829 Roundtrip, found 4 days ago
$829
Roundtrip
found 4 days ago
Select STARLUX Airlines flight, departing Tue, Jan 6 from Seattle to Hanoi, returning Fri, Jan 16, priced at $829 found 4 days ago
Cathay Pacific
Mon, Sep 8 - Wed, Oct 8
SEA
Seattle
HAN
Hanoi
$837 Roundtrip, found 1 day ago
$837
Roundtrip
found 1 day ago
Select Cathay Pacific flight, departing Mon, Sep 8 from Seattle to Hanoi, returning Wed, Oct 8, priced at $837 found 1 day ago

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

February is typically the cheapest month to fly

From $676 - $1,059 per traveler.

Graph displaying average flight prices per month

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 $779
HAN
Noi Bai Intl.
CheapestClosest
Average driving time to city center24 min
Flights from $779
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
$581
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 January. 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 $582 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 January 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.