Cheapest one-way flights from Chicago to London in December from 158€

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

One-Way flights

10 Dec Frontier Airlines
03 Dec Frontier Airlines
12 Dec Spirit Airlines
13 Dec Spirit Airlines
14 Dec Spirit Airlines
02 Dec Spirit Airlines
15 Dec Frontier Airlines
16 Dec Spirit Airlines
31 Dec TAP
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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