Cheapest one-way flights from Seattle to Bangkok in December from $481

Best time to book flights for Seattle (SEA) to Bangkok (BKK) flights at AirHint

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

One-Way flights

31 Dec ANA
25 Dec Korean Air
26 Dec Korean Air
13 Dec Thai Airways

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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