Cheapest return flights from Seattle to Bangkok in January from $545

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

Return flights

22 Jan - 29 Jan Singapore Airlines
29 Jan - 12 Feb Singapore Airlines
25 Jan - 09 Feb Singapore Airlines
24 Jan - 02 Feb Singapore Airlines
13 Jan - 02 Feb Singapore Airlines
22 Jan - 09 Feb Singapore Airlines
22 Jan - 31 Jan Asiana Airlines
25 Jan - 26 Feb Asiana Airlines
18 Jan - 06 Feb Asiana Airlines
06 Jan - 22 Jan Asiana Airlines
12 Jan - 24 Jan Asiana Airlines
15 Jan - 25 Jan Asiana Airlines
21 Jan - 28 Jan Korean Air
14 Jan - 26 Jan Korean Air
05 Jan - 19 Jan Asiana Airlines
21 Jan - 08 Feb Korean Air
21 Jan - 09 Feb Korean Air
06 Jan - 18 Jan Asiana Airlines
17 Jan - 23 Jan Hainan Airlines
29 Jan - 24 Feb Asiana Airlines

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

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