Cheapest return flights from Chicago to Lisbon in August from $847

AirHint found the following cheapest return flights from Chicago (MDW) to Lisbon (LIS) in August 2026 (see full year).

Return flights

30 Aug - 09 Sep Delta
04 Aug - 11 Aug Delta
15 Aug - 22 Aug Delta
20 Aug - 25 Aug Delta
27 Aug - 02 Sep Porter Airlines (Canada) Ltd
05 Aug - 12 Aug Air Transat
11 Aug - 18 Aug Porter Airlines (Canada) Ltd
21 Aug - 26 Aug Porter Airlines (Canada) Ltd
03 Aug - 10 Aug Air Transat
30 Aug - 12 Sep Delta
14 Aug - 21 Aug Delta
28 Aug - 07 Sep Porter Airlines (Canada) Ltd
02 Aug - 09 Aug Delta
16 Aug - 23 Aug Porter Airlines (Canada) Ltd
30 Aug - 11 Sep Condor

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

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