Cheapest one-way flights from Seattle to Bangkok in January from $318

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

One-Way flights

25 Jan Philippine Airlines
27 Jan Hainan Airlines
30 Jan Korean Air
23 Jan Korean Air
26 Jan Korean Air
29 Jan Korean Air
28 Jan Korean Air
22 Jan Korean Air
15 Jan Air Canada
13 Jan Asiana Airlines

Also check the deals for return flights from Seattle to Bangkok in January.

Powered by

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.

Book a cheap hotel in Bangkok

Cheap car rent in Bangkok

Feel free to contact us with any feedback or request another flight research.