AirHint found the following cheapest one-way flights from Chicago (ORD) to London (LHR) in March 2026 (see full year).
One-Way flights
| 02 Mar | WestJet | ||
| 01 Mar | Spirit Airlines | ||
| 09 Mar | WestJet | ||
| 25 Mar | jetBlue | ||
| 29 Mar | jetBlue | ||
| 01 Mar | Iberia | direct | |
| 25 Mar | Iberia | direct | |
| 29 Mar | Iberia | direct | |
| 02 Mar | British Airways | direct |
Also check the deals for return flights from Chicago to London in March.
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