Cheapest return flights from Chicago to London in December from 730€

Best time to book flights for Chicago (ORD) to London (LHR) flights at AirHint

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

Return flights

23 Dec - 10 Jan Air Canada
05 Dec - 01 Jan TAP
28 Dec - 02 Jan TAP
19 Dec - 11 Jan TAP
22 Dec - 31 Dec Austrian Airlines
05 Dec - 01 Jan British Airways direct
20 Dec - 02 Jan Austrian Airlines
28 Dec - 02 Jan British Airways direct
22 Dec - 31 Dec British Airways direct
20 Dec - 02 Jan British Airways direct

Also check the deals for one-way 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