Cheapest return flights from Seattle to Bangkok in January from $512

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

Return flights

23 Jan - 31 Jan Singapore Airlines
29 Jan - 02 Feb Singapore Airlines
14 Jan - 30 Jan Asiana Airlines
10 Jan - 24 Jan Singapore Airlines
29 Jan - 24 Feb Asiana Airlines
31 Jan - 22 Feb Asiana Airlines
01 Jan - 01 Feb STARLUX Airlines
01 Jan - 08 Jan STARLUX Airlines

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

Skyscanner

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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