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

Return flights

01 Feb - 12 Feb	Singapore Airlines
03 Feb - 13 Feb	Singapore Airlines
01 Feb - 14 Feb	Singapore Airlines
01 Feb - 28 Feb	Asiana Airlines
02 Feb - 14 Feb	Asiana Airlines
15 Feb - 27 Feb	Asiana Airlines
05 Feb - 15 Feb	Asiana Airlines
09 Feb - 16 Feb	Asiana Airlines
09 Feb - 18 Feb	ANA
21 Feb - 14 Mar	Asiana Airlines
20 Feb - 27 Feb	Korean Air

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 499€

Return flights