Cheapest return flights from Chicago to Lisbon in August from 561€

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

Return flights

13 Aug - 20 Aug Air France
16 Aug - 27 Aug Delta
08 Aug - 02 Sep Delta
07 Aug - 02 Sep Delta
14 Aug - 19 Aug Delta
28 Aug - 04 Sep Porter Airlines (Canada) Ltd
27 Aug - 05 Sep Porter Airlines (Canada) Ltd
17 Aug - 28 Aug Delta
27 Aug - 03 Sep Porter Airlines (Canada) Ltd
28 Aug - 05 Sep Porter Airlines (Canada) Ltd
11 Aug - 18 Aug KLM
28 Aug - 06 Sep Porter Airlines (Canada) Ltd
30 Aug - 08 Sep Porter Airlines (Canada) Ltd
29 Aug - 04 Sep Porter Airlines (Canada) Ltd
08 Aug - 11 Aug Delta
28 Aug - 31 Aug Porter Airlines (Canada) Ltd
16 Aug - 25 Aug Porter Airlines (Canada) Ltd
09 Aug - 12 Aug Porter Airlines (Canada) Ltd
02 Aug - 10 Aug Frontier Airlines

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

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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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