Cheapest return flights from Chicago to London in September from 398€

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

Return flights

08 Sep - 11 Sep Scandinavian Airlines
30 Sep - 14 Oct Icelandair
22 Sep - 25 Sep Scandinavian Airlines
02 Sep - 11 Sep Icelandair
19 Sep - 26 Sep Icelandair
05 Sep - 09 Sep Icelandair
02 Sep - 10 Sep Icelandair
04 Sep - 09 Sep Icelandair
21 Sep - 26 Sep Icelandair
05 Sep - 10 Sep Icelandair
10 Sep - 17 Sep Icelandair
20 Sep - 04 Oct Scandinavian Airlines
20 Sep - 05 Oct Icelandair
25 Sep - 05 Oct Scandinavian Airlines
30 Sep - 07 Oct Icelandair
08 Sep - 08 Oct TAP
21 Sep - 04 Oct Scandinavian Airlines
26 Sep - 05 Oct Icelandair
20 Sep - 18 Oct Scandinavian Airlines
18 Sep - 01 Oct TAP

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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