$321 Cheap Flights from Seattle (SEA) to Bangkok (BKK)

View $321 flight on Thu, Feb 19, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Suvarnabhumi Intl. Airport (BKK)

Cheap Flights from Seattle to Bangkok (SEA-BKK)

Prices were available within the past 7 days and start at $321 for one-way flights and $581 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Singapore Airlines
Tue, Jan 20 - Thu, Jan 29
SEA
Seattle
BKK
Bangkok
$581 Roundtrip, just found
$581
Roundtrip
just found
Select Singapore Airlines flight, departing Tue, Jan 20 from Seattle to Bangkok, returning Thu, Jan 29, priced at $581 just found
Asiana Airlines
Tue, Nov 25 - Tue, Feb 10
SEA
Seattle
BKK
Bangkok
$675 Roundtrip, found 1 day ago
$675
Roundtrip
found 1 day ago
Select Asiana Airlines flight, departing Tue, Nov 25 from Seattle to Bangkok, returning Tue, Feb 10, priced at $675 found 1 day ago
Korean Air
Fri, Mar 20 - Sat, Mar 28
SEA
Seattle
BKK
Bangkok
$685 Roundtrip, found 5 hours ago
$685
Roundtrip
found 5 hours ago
Select Korean Air flight, departing Fri, Mar 20 from Seattle to Bangkok, returning Sat, Mar 28, priced at $685 found 5 hours ago
Delta
Thu, Feb 19 - Sun, Mar 15
SEA
Seattle
BKK
Bangkok
$695 Roundtrip, just found
$695
Roundtrip
just found
Select Delta flight, departing Thu, Feb 19 from Seattle to Bangkok, returning Sun, Mar 15, priced at $695 just found
Cathay Pacific
Mon, Apr 6 - Mon, Apr 20
SEA
Seattle
BKK
Bangkok
$699 Roundtrip, found 12 hours ago
$699
Roundtrip
found 12 hours ago
Select Cathay Pacific flight, departing Mon, Apr 6 from Seattle to Bangkok, returning Mon, Apr 20, priced at $699 found 12 hours ago
Philippine Airlines
Wed, Oct 1 - Sun, Oct 12
SEA
Seattle
BKK
Bangkok
$702 Roundtrip, just found
$702
Roundtrip
just found
Select Philippine Airlines flight, departing Wed, Oct 1 from Seattle to Bangkok, returning Sun, Oct 12, priced at $702 just found
United
Mon, Sep 29 - Mon, Oct 27
SEA
Seattle
BKK
Bangkok
$708 Roundtrip, found 3 days ago
$708
Roundtrip
found 3 days ago
Select United flight, departing Mon, Sep 29 from Seattle to Bangkok, returning Mon, Oct 27, priced at $708 found 3 days ago
Japan Airlines
Sun, Jan 18 - Thu, Jan 29
SEA
Seattle
BKK
Bangkok
$726 Roundtrip, found 2 hours ago
$726
Roundtrip
found 2 hours ago
Select Japan Airlines flight, departing Sun, Jan 18 from Seattle to Bangkok, returning Thu, Jan 29, priced at $726 found 2 hours ago
All Nippon Airways
Thu, Dec 4 - Thu, Dec 18
SEA
Seattle
BKK
Bangkok
$732 Roundtrip, just found
$732
Roundtrip
just found
Select All Nippon Airways flight, departing Thu, Dec 4 from Seattle to Bangkok, returning Thu, Dec 18, priced at $732 just found
China Airlines
Mon, Nov 24 - Mon, Dec 1
SEA
Seattle
BKK
Bangkok
$798 Roundtrip, just found
$798
Roundtrip
just found
Select China Airlines flight, departing Mon, Nov 24 from Seattle to Bangkok, returning Mon, Dec 1, priced at $798 just found

Find the cheapest month to fly from Seattle (SEA) to Bangkok (BKK)

March is typically the cheapest month to fly

From $643 - $885 per traveler.

Alternative airports near Bangkok

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

Select flight to Suvarnabhumi Intl. BKK. Cheapest option available. Average driving time to city center is 23 minutes. Flights from $935
BKK
Suvarnabhumi Intl.
Cheapest
Average driving time to city center23 min
Flights from $935

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Suvarnabhumi Intl. Airport (BKK) cost?
Grab a cheap one-way flight from $321 or cheap return flight from $581 from Seattle - Tacoma Intl. Airport (SEA) to Suvarnabhumi Intl. Airport (BKK) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Suvarnabhumi Intl. Airport (BKK)?
January is the least expensive month to fly from SEA to BKK. Timing your trip outside of the busy season is often the key to finding better deals on flights.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Suvarnabhumi Intl. Airport (BKK)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest SEA to BKK flight.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Suvarnabhumi Intl. Airport (BKK)?
There are no daily nonstop flights from Seattle - Tacoma Intl. Airport (SEA) to Suvarnabhumi Intl. Airport (BKK). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from SEA to BKK?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*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 Suvarnabhumi Intl. Airport (BKK)?
To arrive at Suvarnabhumi Intl. Airport (BKK) on schedule, select a flight that leaves Seattle - Tacoma Intl. Airport (SEA) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 Suvarnabhumi Intl. Airport (BKK) last-minute?
Waiting until just before your trip to book a ticket from SEA to BKK often results in higher prices. While you might find some last-minute deals, they aren't always guaranteed. Keep your travel plans flexible to maximize your chances of getting a bargain.
Is it cheaper to book a SEA to BKK flight and hotel package?
You'll generally save money by booking a SEA to BKK flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. After choosing your preferred flights and accommodations, you can add extras like car rentals, tours and activities.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Suvarnabhumi Intl. Airport (BKK)?
In most cases, you can cancel or reschedule your SEA to BKK flight. However, additional fees may apply, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you need more details, head to our Customer Service portal.

Travel information

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Suvarnabhumi 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, KLM, Korean Air, Philippine Airlines, Qatar Airways, STARLUX Airlines, Thai Airways International, Turkish Airlines, United
Roundtrip price
$580
Distance
7448 mi

Book with confidence

Book with confidence

Seattle to Bangkok Flights

The cheapest times to fly from Seattle to Bangkok

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 Bangkok are during the month of January. You can find some of the cheapest flights from Seattle to Bangkok with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Bangkok

Sunday is one of the best days to book for cheap flights from Seattle to Bangkok: 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 Bangkok

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 Bangkok in 2025. You can also book with separate airlines for your outbound and return journeys, from $321 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 Bangkok 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 Bangkok 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.

 

Seattle to Bangkok Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.