AirHint found the following cheapest return flights from Seattle (SEA) to Bangkok (BKK) in February 2026 (see full year).

Return flights

01 Feb - 14 Feb	Asiana Airlines
03 Feb - 16 Feb	ANA
01 Feb - 01 Mar	Korean Air
09 Feb - 24 Feb	Korean Air
01 Feb - 04 Mar	Asiana Airlines
05 Feb - 26 Feb	Korean Air
03 Feb - 27 Feb	Asiana Airlines
10 Feb - 25 Feb	Korean Air
22 Feb - 01 Mar	Asiana Airlines
09 Feb - 23 Feb	Korean Air
06 Feb - 16 Feb	Korean Air
06 Feb - 15 Feb	Korean Air
04 Feb - 14 Feb	Korean Air
18 Feb - 07 Mar	Korean Air
14 Feb - 07 Mar	Delta

Also check the deals for one-way flights from Seattle to Bangkok in February.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Seattle to Bangkok in February from 619€

Return flights