Cheapest return flights from Chicago to London in September from 415€

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

Return flights

04 Sep - 18 Sep Icelandair
07 Sep - 14 Sep TAP
28 Sep - 12 Oct Icelandair
08 Sep - 15 Sep Spirit Airlines
10 Sep - 15 Sep Spirit Airlines
05 Sep - 15 Sep Spirit Airlines
12 Sep - 15 Sep Spirit Airlines
08 Sep - 22 Sep Spirit Airlines
05 Sep - 09 Sep Spirit Airlines
22 Sep - 28 Sep Icelandair
12 Sep - 17 Sep Spirit Airlines
23 Sep - 07 Oct Spirit Airlines
26 Sep - 03 Oct Spirit Airlines
11 Sep - 12 Oct Icelandair
26 Sep - 07 Oct SWISS

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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