Cheapest return flights from Denver to London in December from $480

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

Return flights

02 Dec - 09 Dec Icelandair
04 Dec - 11 Dec Icelandair
02 Dec - 22 Dec Icelandair
06 Dec - 11 Jan Icelandair
06 Dec - 13 Jan Icelandair
06 Dec - 14 Dec Icelandair
11 Dec - 15 Dec Icelandair
02 Dec - 23 Dec Icelandair
01 Dec - 23 Dec Icelandair
01 Dec - 08 Dec Icelandair
01 Dec - 16 Dec Icelandair
09 Dec - 14 Dec Icelandair
12 Dec - 12 Jan Icelandair
29 Dec - 15 Jan Icelandair
29 Dec - 10 Jan British Airways direct
06 Dec - 11 Jan British Airways direct
23 Dec - 05 Jan Icelandair
13 Dec - 12 Jan United
06 Dec - 13 Jan Austrian Airlines direct
29 Dec - 05 Jan British Airways direct

Also check the deals for one-way flights from Denver 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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