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

23 Sep - 07 Oct TAP
22 Sep - 16 Oct Finnair direct
22 Sep - 29 Sep Iberia direct
23 Sep - 30 Sep Iberia direct
29 Sep - 06 Oct Iberia direct
21 Sep - 07 Oct Finnair
20 Sep - 04 Oct Aer Lingus
23 Sep - 07 Oct British Airways direct
21 Sep - 07 Oct Iberia direct
23 Sep - 04 Oct TAP
20 Sep - 04 Oct Iberia direct
23 Sep - 04 Oct Iberia direct
18 Sep - 25 Sep Iberia
05 Sep - 23 Sep TAP
12 Sep - 19 Sep TAP
18 Sep - 27 Sep Aer Lingus
01 Sep - 08 Sep Aer Lingus
17 Sep - 24 Sep Iberia direct
16 Sep - 22 Sep Turkish Airlines
21 Sep - 28 Sep Iberia

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

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