Cheapest return flights from Chicago to London in September from 590€

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

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

Return flights

19 Sep - 27 Sep TAP
26 Sep - 03 Oct Icelandair
17 Sep - 21 Sep Turkish Airlines
09 Sep - 15 Sep Scandinavian Airlines
07 Sep - 05 Oct Icelandair
13 Sep - 27 Sep TAP
14 Sep - 21 Sep Icelandair
28 Sep - 01 Oct TAP
01 Sep - 15 Sep Scandinavian Airlines
04 Sep - 16 Sep Turkish Airlines
29 Sep - 11 Oct SWISS
12 Sep - 22 Sep Turkish Airlines

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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