Cheapest return flights from Chicago to London in December from $558

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

01 Dec - 11 Dec Scandinavian Airlines
01 Dec - 05 Dec Icelandair
01 Dec - 11 Dec Iberia direct
01 Dec - 30 Dec Air Canada
10 Dec - 04 Jan Air Canada
13 Dec - 29 Dec Icelandair
23 Dec - 30 Dec Air Canada
14 Dec - 29 Dec Air Canada
13 Dec - 28 Dec Icelandair
01 Dec - 30 Dec British Airways direct
01 Dec - 05 Dec Finnair direct
17 Dec - 08 Jan TAP
17 Dec - 08 Jan British Airways direct
10 Dec - 04 Jan Finnair 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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