Cheapest return ORD–LHR flights, September

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

Return flights

15 Sep - 22 Sep Turkish Airlines
11 Sep - 13 Sep Scandinavian Airlines
22 Sep - 29 Sep Turkish Airlines
15 Sep - 24 Sep Turkish Airlines
13 Sep - 27 Sep Turkish Airlines
06 Sep - 23 Sep Turkish Airlines
22 Sep - 27 Sep Turkish Airlines
23 Sep - 24 Sep Aer Lingus
24 Sep - 22 Oct Scandinavian Airlines
09 Sep - 16 Sep Aer Lingus
07 Sep - 18 Sep Aer Lingus
23 Sep - 02 Oct Aer Lingus
26 Sep - 01 Oct Scandinavian Airlines
27 Sep - 01 Oct Scandinavian Airlines
24 Sep - 01 Oct Scandinavian Airlines
24 Sep - 03 Oct Scandinavian Airlines
24 Sep - 01 Oct British Airways direct
24 Sep - 22 Oct British Airways direct
24 Sep - 03 Oct Finnair direct
26 Sep - 01 Oct American Airlines direct

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

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