Cheapest return flights from Chicago to London in December from $1081

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

Return flights

27 Dec - 09 Jan Frontier Airlines
13 Dec - 10 Jan Frontier Airlines
14 Dec - 24 Dec Frontier Airlines
29 Dec - 11 Jan Southwest Airlines
25 Dec - 30 Dec Frontier Airlines
25 Dec - 29 Dec Frontier Airlines
25 Dec - 01 Jan Frontier Airlines
13 Dec - 03 Jan Frontier Airlines
19 Dec - 25 Dec Frontier Airlines
20 Dec - 01 Jan Frontier Airlines
28 Dec - 01 Jan Frontier Airlines
22 Dec - 03 Jan Frontier Airlines
22 Dec - 04 Jan Frontier Airlines
23 Dec - 29 Dec Frontier Airlines
17 Dec - 01 Jan Frontier Airlines
25 Dec - 28 Dec Southwest Airlines
22 Dec - 28 Dec Southwest Airlines
19 Dec - 22 Dec Southwest Airlines
23 Dec - 28 Dec Southwest Airlines
12 Dec - 15 Dec Frontier Airlines

Also check the deals for one-way flights from Chicago to London in December.

Powered by

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.