Cheapest return flights from Chicago to London in December from $604

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

02 Dec - 09 Dec Icelandair
11 Dec - 16 Dec Icelandair
06 Dec - 13 Dec Icelandair
24 Dec - 08 Jan Icelandair
02 Dec - 09 Dec American Airlines direct
16 Dec - 23 Dec United
23 Dec - 30 Dec Icelandair
22 Dec - 30 Dec Air Canada
22 Dec - 31 Dec Air Canada
13 Dec - 05 Jan Air Canada
11 Dec - 16 Dec American Airlines direct
15 Dec - 26 Dec Air Canada
15 Dec - 12 Jan Icelandair
15 Dec - 12 Jan Finnair direct
24 Dec - 02 Jan TAP
18 Dec - 08 Jan Icelandair
18 Dec - 08 Jan Iberia direct
19 Dec - 03 Jan TAP
13 Dec - 05 Jan American Airlines direct
19 Dec - 03 Jan Lufthansa direct

Also check the deals for one-way 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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