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

Return flights

28 Oct - 04 Nov	Air France
27 Oct - 03 Nov	Air France
29 Oct - 05 Nov	Air France
30 Oct - 06 Nov	Air France
31 Oct - 07 Nov	Air France
19 Oct - 19 Nov	Delta
26 Oct - 02 Nov	KLM
08 Oct - 15 Oct	Air France
14 Oct - 21 Oct	Air France
21 Oct - 28 Oct	Air France
22 Oct - 29 Oct	Air France
24 Oct - 31 Oct	Air France
15 Oct - 22 Oct	Air France
17 Oct - 24 Oct	Air France
23 Oct - 30 Oct	Air France
07 Oct - 14 Oct	Air France
09 Oct - 16 Oct	Air France
25 Oct - 01 Nov	Air France

Also check the deals for one-way flights from Chicago to Bucharest 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 Bucharest in October from 546€

Return flights