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

Return flights

14 Apr - 09 May	Icelandair
24 Apr - 29 Apr	Icelandair
28 Apr - 23 May	Icelandair
04 Apr - 25 Apr	Icelandair
03 Apr - 25 Apr	Icelandair
30 Apr - 05 May	Icelandair
12 Apr - 19 Apr	Turkish Airlines
14 Apr - 24 Apr	Turkish Airlines
26 Apr - 03 May	Turkish Airlines
15 Apr - 25 Apr	Icelandair
01 Apr - 10 Apr	Icelandair

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

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 April from $568

Return flights