Cheapest one-way flights from Chicago to London in December from 314€

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

One-Way flights

04 Dec Air Transat
01 Dec Air Transat
15 Dec Frontier Airlines
12 Dec Porter Airlines (Canada) Ltd
10 Dec Porter Airlines (Canada) Ltd
21 Dec Frontier Airlines
19 Dec Frontier Airlines
29 Dec Frontier Airlines
20 Dec Porter Airlines (Canada) Ltd

Also check the deals for return flights from Chicago to London in December.

Skyscanner

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.

Book a cheap hotel in London

Cheap car rent in London

Feel free to contact us with any feedback or request another flight research.