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

Return flights

21 Oct - 28 Oct	Delta
20 Oct - 04 Nov	Delta
24 Oct - 03 Nov	Frontier Airlines
08 Oct - 22 Oct	Delta
08 Oct - 23 Oct	Delta
09 Oct - 23 Oct	Frontier Airlines
25 Oct - 07 Nov	Delta
25 Oct - 04 Nov	Delta
15 Oct - 09 Nov	Delta
07 Oct - 10 Nov	Delta
30 Oct - 12 Nov	Delta
25 Oct - 01 Nov	Delta
10 Oct - 14 Oct	Delta
26 Oct - 16 Nov	Delta
24 Oct - 23 Nov	Delta

Also check the deals for one-way flights from Chicago to Bangkok in October.

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 October from 927€

Return flights