Cheapest one-way flights from Chicago to London in December from $182

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

One-Way flights

09 Dec Frontier Airlines
02 Dec Frontier Airlines
08 Dec Frontier Airlines
11 Dec Frontier Airlines
04 Dec Frontier Airlines
12 Dec Frontier Airlines
13 Dec Frontier Airlines
10 Dec Frontier Airlines
16 Dec Frontier Airlines
24 Dec Frontier 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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