Cheapest one-way flights from Seattle to Bangkok in December from $330

AirHint found the following cheapest one-way flights from Seattle (SEA) to Bangkok (BKK) in December 2025 (see full year).

One-Way flights

30 Dec Philippine Airlines
03 Dec Asiana Airlines
01 Dec Asiana Airlines
26 Dec Asiana Airlines
04 Dec Korean Air
12 Dec Asiana Airlines
17 Dec Air Canada
23 Dec Asiana Airlines
20 Dec Alaska Airlines
21 Dec Alaska Airlines

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

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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