Cheapest return flights from Chicago to London in September from 545€

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

24 Sep - 30 Sep Icelandair
22 Sep - 29 Sep Air Canada
29 Sep - 08 Oct Air Canada
22 Sep - 30 Sep Iberia direct
05 Sep - 09 Sep Aer Lingus
04 Sep - 16 Sep Aer Lingus
09 Sep - 16 Sep Aer Lingus
14 Sep - 30 Sep Aer Lingus
12 Sep - 08 Oct Aer Lingus
12 Sep - 03 Oct Aer Lingus
14 Sep - 30 Sep Iberia direct
12 Sep - 03 Oct Iberia direct
04 Sep - 16 Sep Iberia direct
09 Sep - 16 Sep Iberia direct
24 Sep - 01 Oct Delta
17 Sep - 04 Oct Icelandair
30 Sep - 07 Oct Delta
26 Sep - 03 Oct Aer Lingus
23 Sep - 04 Oct Aer Lingus
23 Sep - 04 Oct Iberia direct

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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