Cheapest return flights from London to Chicago in December from $580

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

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

Return flights

03 Dec - 10 Dec Icelandair
05 Dec - 12 Dec Scandinavian Airlines
08 Dec - 15 Dec Lufthansa
08 Dec - 11 Dec Delta
09 Dec - 16 Dec Delta
02 Dec - 09 Dec Delta
03 Dec - 10 Dec Finnair direct
01 Dec - 04 Dec Delta
15 Dec - 22 Dec Scandinavian Airlines
07 Dec - 10 Dec Delta
30 Dec - 06 Jan Delta
29 Dec - 07 Jan Icelandair
19 Dec - 02 Jan TAP
29 Dec - 07 Jan British Airways direct
23 Dec - 02 Jan TAP
24 Dec - 02 Jan TAP
29 Dec - 05 Jan Delta
22 Dec - 03 Jan Icelandair
26 Dec - 02 Jan TAP
18 Dec - 03 Jan Icelandair

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