Cheapest return flights from Chicago to London in September from $586

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 - 07 Oct Scandinavian Airlines
23 Sep - 07 Oct Iberia direct
21 Sep - 30 Sep Iberia direct
10 Sep - 18 Sep British Airways
10 Sep - 18 Sep Iberia direct
16 Sep - 14 Oct Iberia direct
06 Sep - 16 Sep Iberia
15 Sep - 29 Sep Iberia
19 Sep - 23 Sep Icelandair
19 Sep - 23 Sep Iberia direct
27 Sep - 05 Oct jetBlue
09 Sep - 16 Sep British Airways direct
17 Sep - 26 Sep Air Canada
17 Sep - 26 Sep British Airways direct
27 Sep - 05 Oct British Airways 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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