Cheapest return flights from Chicago to London in September from 595€

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

23 Sep - 30 Sep Air Canada
09 Sep - 16 Sep jetBlue
24 Sep - 01 Oct Aer Lingus
19 Sep - 15 Oct Icelandair
24 Sep - 02 Oct Icelandair
22 Sep - 12 Oct Scandinavian Airlines
24 Sep - 02 Oct Finnair direct
24 Sep - 01 Oct Finnair direct
16 Sep - 24 Sep Turkish Airlines
03 Sep - 24 Sep United
09 Sep - 16 Sep Finnair direct
16 Sep - 24 Sep Finnair direct
03 Sep - 24 Sep Finnair direct
01 Sep - 09 Sep Finnair direct
28 Sep - 05 Oct Icelandair
18 Sep - 25 Sep Icelandair
19 Sep - 15 Oct Finnair direct
01 Sep - 14 Sep Air Canada
21 Sep - 12 Oct Air Canada

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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