Seattle to Bangkok flights
The cheapest round trip we found from Seattle to Bangkok is $789 (Feb 4 – 9, 2027, 1 stop), 12% below the usual $892.
SEA to BKK · Round trip · Economy · Prices per person in USD · Price found (50 minutes ago)
Cheapest found
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | $892 |
| December 2026 | $1,476 |
| January 2027 | No fares found yet |
| February 2027 | $789 (cheapest month) |
Cheapest dates in the next 4 months
Round trip, per person-
Feb 4 – 9, 2027 5 nights · leave Thu$789 −12% vs usual$789 −12% vs usual Book
Philippine Airlines 1 stop · 18h 05m -
Nov 22 – Dec 8 16 nights · leave Sun$892$892 Book
Philippine Airlines 1 stop · 18h 00m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Things to do in Bangkok
Tickets and tours on KlookTo see tours and tickets here, turn on partner content in .
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Airport transfer to Bangkok
Fixed prices from BKK on KiwitaxiTo see transfer prices here, turn on partner content in .
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Plan the rest of your trip
Bangkok · Feb 4 – 9, 2027- eSIM for Thailand Yesim · prepaid mobile data (opens Yesim in a new tab)
- Car rental in Thailand Economybookings · compare rental companies (opens Economybookings in a new tab)
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Seattle to Bangkok: questions
How much does a flight from Seattle to Bangkok cost?
The cheapest round trip we have found right now is $789, leaving February 4 and returning February 9. The usual price on this route is about $892, so this fare is 12% less. Prices are per person, economy, in USD.
What is the cheapest month to fly from Seattle to Bangkok?
February 2027, with round trips from $789. The most expensive month in our data is December (from $1,476). Based on the 3 months ahead we have prices for.
Which airports do Seattle to Bangkok flights use?
Seattle airports include Seattle-Tacoma International (SEA) and Boeing Field International (BFI). Bangkok airports include Suvarnabhumi (BKK) and Don Mueang International (DMK). The prices on this page cover every airport in both cities (SEA and BKK are the city codes).
About this route
We track round-trip economy fares from Seattle (United States) to Bangkok (Thailand) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $789, departing February 4 and returning February 9, about 12% below the usual $892. The cheapest month to fly in our data is February, from $789. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.