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

View AU$487 flight on Fri, 28 Nov. 2025Opens in a new window

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

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

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 14 Aug. - Thu, 28 Aug.
SEA
Seattle
BKK
Bangkok
AU$1,056 Return, found 5 days ago
AU$1,056
Return
found 5 days ago
Select Delta flight, departing Thu, 14 Aug. from Seattle to Bangkok, returning Thu, 28 Aug., priced at AU$1,056 found 5 days ago
Asiana Airlines
Mon, 17 Nov. - Wed, 3 Dec.
SEA
Seattle
BKK
Bangkok
AU$1,060 Return, found 3 days ago
AU$1,060
Return
found 3 days ago
Select Asiana Airlines flight, departing Mon, 17 Nov. from Seattle to Bangkok, returning Wed, 3 Dec., priced at AU$1,060 found 3 days ago
Asiana Airlines
Thu, 14 Aug. - Thu, 28 Aug.
SEA
Seattle
BKK
Bangkok
AU$1,063 Return, found 5 days ago
AU$1,063
Return
found 5 days ago
Select Asiana Airlines flight, departing Thu, 14 Aug. from Seattle to Bangkok, returning Thu, 28 Aug., priced at AU$1,063 found 5 days ago
Delta
Thu, 14 Aug. - Wed, 27 Aug.
SEA
Seattle
BKK
Bangkok
AU$1,064 Return, found 6 days ago
AU$1,064
Return
found 6 days ago
Select Delta flight, departing Thu, 14 Aug. from Seattle to Bangkok, returning Wed, 27 Aug., priced at AU$1,064 found 6 days ago
Korean Air
Thu, 14 Aug. - Thu, 28 Aug.
SEA
Seattle
BKK
Bangkok
AU$1,074 Return, found 5 days ago
AU$1,074
Return
found 5 days ago
Select Korean Air flight, departing Thu, 14 Aug. from Seattle to Bangkok, returning Thu, 28 Aug., priced at AU$1,074 found 5 days ago
United
Thu, 14 Aug. - Wed, 27 Aug.
SEA
Seattle
BKK
Bangkok
AU$1,091 Return, found 6 days ago
AU$1,091
Return
found 6 days ago
Select United flight, departing Thu, 14 Aug. from Seattle to Bangkok, returning Wed, 27 Aug., priced at AU$1,091 found 6 days ago
Philippine Airlines
Fri, 19 Sep. - Sun, 28 Sep.
SEA
Seattle
BKK
Bangkok
AU$1,207 Return, found 3 days ago
AU$1,207
Return
found 3 days ago
Select Philippine Airlines flight, departing Fri, 19 Sep. from Seattle to Bangkok, returning Sun, 28 Sep., priced at AU$1,207 found 3 days ago
All Nippon Airways
Fri, 19 Sep. - Sun, 28 Sep.
SEA
Seattle
BKK
Bangkok
AU$1,232 Return, found 3 days ago
AU$1,232
Return
found 3 days ago
Select All Nippon Airways flight, departing Fri, 19 Sep. from Seattle to Bangkok, returning Sun, 28 Sep., priced at AU$1,232 found 3 days ago
China Airlines
Mon, 3 Nov. - Thu, 6 Nov.
SEA
Seattle
BKK
Bangkok
AU$1,325 Return, found 6 days ago
AU$1,325
Return
found 6 days ago
Select China Airlines flight, departing Mon, 3 Nov. from Seattle to Bangkok, returning Thu, 6 Nov., priced at AU$1,325 found 6 days ago
EVA Airways
Mon, 17 Nov. - Wed, 3 Dec.
SEA
Seattle
BKK
Bangkok
AU$1,341 Return, found 3 days ago
AU$1,341
Return
found 3 days ago
Select EVA Airways flight, departing Mon, 17 Nov. from Seattle to Bangkok, returning Wed, 3 Dec., priced at AU$1,341 found 3 days ago

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

March is typically the cheapest month to fly

From AU$1,004 - AU$1,363 per traveller.

Graph displaying average flight prices per month

Flight from Seattle to Bangkok route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Suvarnabhumi Intl.
Airlines serving
EVA Airways, Thai Airways International
Return price
AU$1,056
Distance
11917 km

Your quick guide to flights from Seattle to Bangkok

Pick up great flights from Seattle to Bangkok

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Seattle to Bangkok. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Seattle to Bangkok that take around hours.

Find cheap flights from Seattle to Bangkok

From the great flight deals with prices currently ranging from AU$1,056 to AU$1,341, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Seattle to Bangkok around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Bangkok is normally in August.

Reasons to book your flight from Seattle to Bangkok with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Seattle to Bangkok across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Bangkok right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Frequently asked questions

How much is a flight from Seattle - Tacoma Intl. Airport (SEA) to BKK?
The lowest price advertised for a round-trip journey from Sea-Tac Airport to Suvarnabhumi Intl. Airport (BKK) is AU$1,056. But you better move fast. This price is taken from fares available within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from SEA to Bangkok Airport?
We understand that things crop up unexpectedly, so we've made it as easy as possible for you to cancel your trip online. Just visit the Customer Service Portal and follow the instructions.
How do I find cheap flights from Seattle - Tacoma Intl. Airport (SEA) to BKK that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for SEA to Suvarnabhumi Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Sea-Tac Airport to Bangkok Airport?
With around 12 000 kilometres separating SeaTac and Bang Phli, your flight will be a long one. Pack wisely and make your trip more comfortable. Little things like warm clothes and a quality travel pillow can make all the difference.
Which airlines fly direct from Sea-Tac Airport to Suvarnabhumi Airport?
Currently, no airlines offer direct flights from Sea-Tac Airport to BKK. You'll have to book a flight with one or more stops. To get the best price and connections, lock in your airfare well ahead of time.
Are Seattle - Tacoma Intl. Airport (SEA) to Bangkok Airport flight tickets cheaper when they're purchased at the last minute?
Tickets from Sea-Tac Airport to BKK are available up to a year prior to departure on Expedia. And although you may occasionally score a great last-minute deal, it's not something you should bank on. Also, booking your flights ahead of time means you'll have more choices — and you can avoid getting stuck in the dreaded middle seat! We regularly update our fares to bring you the biggest bargains, so check back often for all the latest specials.

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