Cheapest one-way flights from Chicago to London in December from 203€

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

One-Way flights

01 Dec WestJet
04 Dec Spirit Airlines
06 Dec Frontier Airlines
02 Dec Spirit Airlines
07 Dec Frontier Airlines
03 Dec Frontier Airlines
09 Dec Spirit Airlines
10 Dec TAP
11 Dec Spirit Airlines
31 Dec TAP

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.

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