AirHint found the following cheapest return flights from Los Angeles (LAX) to Bangkok (BKK) in December 2025 (see full year).

Return flights

30 Dec - 27 Jan	Asiana Airlines
31 Dec - 21 Jan	Asiana Airlines
29 Dec - 19 Jan	Asiana Airlines
30 Dec - 13 Jan	Asiana Airlines
31 Dec - 29 Jan	Asiana Airlines
29 Dec - 12 Jan	Asiana Airlines
30 Dec - 19 Jan	China Eastern
31 Dec - 17 Jan	Delta
31 Dec - 08 Jan	Delta
31 Dec - 07 Jan	Delta
17 Dec - 21 Dec	Frontier Airlines
26 Dec - 29 Dec	China Eastern
18 Dec - 24 Dec	Air Canada
24 Dec - 31 Dec	China Southern
18 Dec - 25 Dec	Hawaiian Airlines
21 Dec - 25 Dec	Flair Airlines
21 Dec - 23 Dec	Asiana Airlines
17 Dec - 27 Dec	Hawaiian Airlines
23 Dec - 30 Dec	China Airlines
23 Dec - 31 Dec	China Airlines

Also check the deals for one-way flights from Los Angeles to Bangkok in December.

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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Cheapest return flights from Los Angeles to Bangkok in December from $720

Return flights