Cheapest one-way flights from Seattle (SEA) to Bangkok (BKK), September

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
15 Sep Singapore Airlines
23 Sep Philippine Airlines
06 Sep Singapore Airlines
13 Sep Singapore Airlines
30 Sep Korean Air
27 Sep Korean Air
01 Sep Korean Air
02 Sep Korean Air
21 Sep Korean Air
22 Sep Korean Air
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deals for return flights from Seattle to Bangkok in September.

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Updated Jul 19, 2026.

About these fares

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