Cheapest one-way flights from Chicago to London in December from $235

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

One-Way flights

10 Dec Frontier Airlines
09 Dec Spirit Airlines
08 Dec Frontier Airlines
03 Dec Spirit Airlines
12 Dec Frontier Airlines
07 Dec Frontier Airlines
11 Dec jetBlue
13 Dec jetBlue
02 Dec Spirit Airlines
14 Dec Spirit Airlines

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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