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

Return flights

18 Jan - 25 Jan	Icelandair
11 Jan - 18 Jan	Icelandair
14 Jan - 21 Jan	Icelandair
18 Jan - 28 Jan	Icelandair
20 Jan - 27 Jan	Lufthansa
07 Jan - 14 Jan	British Airways	direct
20 Jan - 27 Jan	British Airways	direct
13 Jan - 20 Jan	British Airways
05 Jan - 19 Jan	Icelandair
11 Jan - 18 Jan	British Airways	direct

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 467€

Return flights