Cheapest return ORD–MAD flights, September

AirHint found the following cheapest return flights from Chicago (ORD) to Madrid (MAD) in September 2026 (see full year).

Return flights

16 Sep - 24 Sep Turkish Airlines
16 Sep - 26 Sep Turkish Airlines
28 Sep - 04 Oct Turkish Airlines
07 Sep - 17 Sep Turkish Airlines
30 Sep - 01 Oct Aer Lingus
27 Sep - 09 Oct Aer Lingus
29 Sep - 06 Oct Iberia
24 Sep - 01 Oct TAP
17 Sep - 01 Oct Aer Lingus
02 Sep - 10 Sep Turkish Airlines
23 Sep - 27 Sep Aer Lingus
27 Sep - 09 Oct Finnair direct
19 Sep - 26 Sep TAP
09 Sep - 16 Sep TAP
24 Sep - 27 Sep Aer Lingus
17 Sep - 01 Oct Finnair direct
24 Sep - 01 Oct Iberia direct
20 Sep - 04 Oct Aer Lingus
17 Sep - 26 Sep TAP
05 Sep - 12 Sep TAP

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

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