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

Return flights

02 Dec - 09 Dec	Delta
01 Dec - 15 Jan	ANA
07 Dec - 21 Dec	Turkish Airlines
07 Dec - 20 Dec	Turkish Airlines
03 Dec - 16 Dec	Turkish Airlines
03 Dec - 22 Dec	Turkish Airlines
08 Dec - 21 Dec	ANA
09 Dec - 14 Jan	ANA
09 Dec - 13 Jan	ANA
09 Dec - 15 Jan	United
01 Dec - 30 Dec	Turkish Airlines
12 Dec - 16 Dec	Turkish Airlines
01 Dec - 31 Dec	Turkish Airlines
28 Dec - 11 Jan	Lufthansa
09 Dec - 11 Jan	ANA
09 Dec - 08 Jan	United
29 Dec - 07 Jan	United
15 Dec - 22 Dec	Alaska Airlines
23 Dec - 16 Jan	IndiGo
23 Dec - 15 Jan	IndiGo

Also check the deals for one-way flights from Chicago 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 Chicago to Bangkok in December from $760

Return flights