AirHint found the following cheapest return flights from Denver (DEN) to London (LGW) in January 2026 (see full year).

Return flights

14 Jan - 07 Feb	Icelandair
07 Jan - 31 Jan	Icelandair
30 Jan - 06 Feb	Frontier Airlines
23 Jan - 03 Feb	Icelandair
29 Jan - 06 Feb	Frontier Airlines
11 Jan - 18 Jan	Icelandair
06 Jan - 27 Jan	Icelandair
29 Jan - 07 Feb	Frontier Airlines
16 Jan - 18 Jan	Icelandair
05 Jan - 21 Jan	Frontier Airlines
10 Jan - 17 Jan	Turkish Airlines
10 Jan - 31 Jan	Turkish Airlines
22 Jan - 14 Feb	Turkish Airlines
02 Jan - 24 Jan	Turkish Airlines

Also check the deals for one-way flights from Denver to London in January.

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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Cheapest return flights from Denver to London in January from $486

Return flights