Cheapest return flights from Seattle (SEA) to Bangkok (BKK), September

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
13 Sep 31 Oct Singapore Airlines
01 Sep 08 Sep Asiana Airlines
07 Sep 17 Sep Asiana Airlines
07 Sep 15 Sep Asiana Airlines
08 Sep 17 Sep Asiana Airlines
15 Sep 23 Sep Korean Air
07 Sep 20 Sep Korean Air
02 Sep 30 Sep Korean Air
25 Sep 15 Oct Singapore Airlines
01 Sep 01 Oct Asiana Airlines
16 Sep 23 Sep Korean Air
01 Sep 06 Sep Korean Air
15 Sep 18 Sep Korean Air
26 Sep 15 Oct Korean Air
25 Sep 19 Oct United
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deals for one-way flights from Seattle to Bangkok in September.

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Updated Jul 19, 2026.

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