Cheapest one-way flights from Chicago to London in September from 166€

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

One-Way flights

28 Sep Icelandair
21 Sep Icelandair
09 Sep Spirit Airlines
22 Sep TAP
24 Sep Spirit Airlines
07 Sep TAP
04 Sep Spirit Airlines
14 Sep TAP
27 Sep TAP
08 Sep Spirit Airlines

Also check the deals for return 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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