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

Return flights

01 Dec - 08 Dec	Delta
16 Dec - 23 Dec	Delta
15 Dec - 17 Jan	Delta
29 Dec - 07 Jan	Delta
10 Dec - 16 Dec	Delta
14 Dec - 08 Jan	Delta
24 Dec - 08 Jan	Delta
27 Dec - 06 Jan	Delta
27 Dec - 10 Jan	Delta
21 Dec - 20 Jan	Delta
21 Dec - 17 Jan	Delta
21 Dec - 19 Jan	Delta
20 Dec - 24 Dec	Delta
20 Dec - 17 Jan	Delta
18 Dec - 25 Dec	Delta
12 Dec - 16 Dec	Delta
19 Dec - 26 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 $1094

Return flights