Cheapest return flights from Chicago to London in September from $535

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

Return flights

02 Sep - 06 Sep Scandinavian Airlines
19 Sep - 29 Sep Scandinavian Airlines
15 Sep - 22 Sep Aer Lingus
22 Sep - 13 Oct Aer Lingus
15 Sep - 24 Sep Aer Lingus
23 Sep - 30 Sep Aer Lingus
22 Sep - 07 Oct Delta
15 Sep - 24 Sep British Airways direct
23 Sep - 30 Sep Iberia direct
05 Sep - 11 Sep Aer Lingus
03 Sep - 11 Sep Aer Lingus
16 Sep - 03 Oct Aer Lingus
24 Sep - 22 Oct Aer Lingus
05 Sep - 10 Sep Aer Lingus
30 Sep - 03 Oct Scandinavian Airlines
24 Sep - 22 Oct British Airways direct
30 Sep - 03 Oct United direct
16 Sep - 03 Oct Brussels Airlines direct

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

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