Cheapest return flights from Chicago to London in December from 585€

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

03 Dec - 10 Dec Delta
02 Dec - 09 Dec Delta
10 Dec - 17 Dec Delta
01 Dec - 08 Dec Delta
09 Dec - 16 Dec Delta
16 Dec - 23 Dec Delta
31 Dec - 07 Jan Delta
07 Dec - 14 Dec Delta
05 Dec - 12 Dec Delta
04 Dec - 11 Dec Delta
08 Dec - 15 Dec Delta
23 Dec - 12 Jan Delta
30 Dec - 06 Jan Delta
23 Dec - 12 Jan Iberia direct
26 Dec - 05 Jan United
29 Dec - 05 Jan Delta
25 Dec - 01 Jan Delta
29 Dec - 01 Jan Delta
31 Dec - 03 Jan Delta
26 Dec - 05 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.

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