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

Return flights

16 Jan - 24 Jan	Icelandair
12 Jan - 19 Jan	United
05 Jan - 12 Jan	Icelandair
22 Jan - 29 Jan	United
22 Jan - 29 Jan	British Airways	direct
12 Jan - 19 Jan	British Airways	direct
05 Jan - 12 Jan	British Airways	direct
16 Jan - 24 Jan	British Airways	direct
02 Jan - 09 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 508€

Return flights