Cheapest return flights from Seattle (SEA) to Bangkok (BKK), December

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
31 Dec 28 Jan Asiana Airlines
07 Dec 11 Jan Asiana Airlines
29 Dec 10 Jan Asiana Airlines
28 Dec 10 Jan Asiana Airlines
28 Dec 21 Jan Asiana Airlines
28 Dec 14 Jan Asiana Airlines
13 Dec 10 Jan Singapore Airlines
13 Dec 11 Jan Singapore Airlines
09 Dec 27 Dec Singapore Airlines
10 Dec 20 Dec Thai Airways
26 Dec 05 Jan Singapore Airlines
26 Dec 08 Jan Singapore Airlines
12 Dec 26 Dec Singapore Airlines
01 Dec 08 Dec Cathay Pacific
14 Dec 26 Dec Alaska Airlines
21 Dec 28 Dec Asiana Airlines
22 Dec 27 Dec Cathay Pacific
21 Dec 22 Dec China Airlines
08 Dec 22 Dec Air Canada
20 Dec 22 Dec Turkish Airlines
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Updated Aug 26, 2026.

About these fares

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