Cheapest return flights from Chicago to London in September from 518€

Best time to book flights for Chicago (ORD) to London (LHR) flights at AirHint

AirHint found the following cheapest return flights from Chicago (ORD) to London (LHR) in September 2025 (see full year).

Return flights

28 Sep - 10 Oct TAP
09 Sep - 15 Sep Scandinavian Airlines
28 Sep - 05 Oct Scandinavian Airlines
02 Sep - 20 Sep Scandinavian Airlines
15 Sep - 23 Sep Scandinavian Airlines
05 Sep - 12 Sep jetBlue
10 Sep - 18 Sep United
10 Sep - 17 Sep United
28 Sep - 10 Oct British Airways direct
18 Sep - 24 Sep TAP
10 Sep - 17 Sep Finnair direct
15 Sep - 23 Sep Finnair direct
09 Sep - 23 Sep Scandinavian Airlines
28 Sep - 05 Oct British Airways direct

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

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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