Cheapest return flights from Chicago to Lisbon in October from 552€

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

Return flights

27 Oct - 03 Nov Air France
28 Oct - 04 Nov Air France
15 Oct - 22 Oct Air France
21 Oct - 28 Oct KLM
03 Oct - 10 Oct Frontier Airlines
31 Oct - 08 Nov Delta
10 Oct - 17 Oct Frontier Airlines
24 Oct - 31 Oct Delta
03 Oct - 09 Oct Frontier Airlines
13 Oct - 20 Oct KLM
06 Oct - 13 Oct KLM
07 Oct - 14 Oct Air France
07 Oct - 15 Oct Porter Airlines (Canada) Ltd
25 Oct - 02 Nov Delta
26 Oct - 02 Nov Air France
31 Oct - 07 Nov Air France

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

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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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