Cheapest return flights from Chicago to London in September from 401€

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

Return flights

22 Sep - 14 Oct Spirit Airlines
27 Sep - 07 Oct Spirit Airlines
23 Sep - 16 Oct Icelandair
22 Sep - 16 Oct Icelandair
24 Sep - 28 Sep Spirit Airlines
22 Sep - 15 Oct Icelandair
20 Sep - 23 Sep Spirit Airlines
16 Sep - 30 Sep Spirit Airlines
07 Sep - 22 Sep Icelandair
06 Sep - 18 Sep Icelandair
10 Sep - 17 Sep Spirit Airlines
12 Sep - 17 Sep Icelandair
26 Sep - 01 Oct Spirit Airlines
12 Sep - 16 Sep Icelandair
03 Sep - 06 Sep Icelandair
14 Sep - 17 Sep Spirit Airlines
09 Sep - 05 Oct Spirit Airlines
17 Sep - 06 Oct Spirit Airlines
15 Sep - 21 Oct Spirit Airlines
15 Sep - 20 Oct Spirit Airlines

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

Skyscanner

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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