AirHint found the following cheapest one-way flights from Chicago (MDW) to London (LGW) in September 2026 (see full year).
One-Way flights
| 15 Sep | WestJet | ||
| 28 Sep | WestJet | ||
| 25 Sep | WestJet | ||
| 17 Sep | Condor | ||
| 10 Sep | Condor |
Also check the deals for return flights from Chicago to London in September.
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