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

Return flights

28 Dec - 19 Jan	Delta
02 Dec - 11 Dec	Delta
29 Dec - 05 Jan	Delta
28 Dec - 09 Jan	Delta
27 Dec - 09 Jan	Delta
03 Dec - 16 Dec	Delta
14 Dec - 21 Dec	Air France
18 Dec - 13 Jan	Delta
18 Dec - 01 Jan	Delta
19 Dec - 04 Jan	Delta
21 Dec - 31 Dec	Air France
12 Dec - 17 Dec	Delta

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 1253€

Return flights