AirHint found the following cheapest one-way flights from Chicago (ORD) to London (LHR) in December 2025 (see full year).
One-Way flights
| 06 Dec | Spirit Airlines | ||
| 11 Dec | jetBlue | ||
| 05 Dec | jetBlue | ||
| 07 Dec | jetBlue | ||
| 09 Dec | Spirit Airlines | ||
| 02 Dec | Air Canada | ||
| 31 Dec | Icelandair | ||
| 01 Dec | Spirit Airlines | ||
| 14 Dec | jetBlue | ||
| 13 Dec | jetBlue |
Also check the deals for return flights from Chicago to London in December.
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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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