Cheapest return flights from Chicago to Lisbon in September from 835€

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

Return flights

22 Sep - 27 Oct Delta
22 Sep - 05 Oct Delta
22 Sep - 03 Oct Delta
23 Sep - 30 Sep Delta
01 Sep - 08 Sep Frontier Airlines
19 Sep - 03 Oct Delta
26 Sep - 03 Oct Delta
08 Sep - 15 Sep Condor
05 Sep - 15 Sep Condor
15 Sep - 22 Sep Delta
18 Sep - 30 Sep Delta
06 Sep - 15 Sep Condor
04 Sep - 13 Sep Condor

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

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