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
08 Sep Hainan Airlines
15 Sep Singapore Airlines
12 Sep Singapore Airlines
13 Sep Singapore Airlines
06 Sep Singapore Airlines
01 Sep Korean Air
28 Sep Korean Air
21 Sep Korean Air
17 Sep Korean Air
30 Sep Korean Air
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deals for return flights from Seattle to Bangkok in September.

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Updated Jul 18, 2026.

About these fares

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