Cheapest return flights from Denver to London in April from $536

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

Return flights

23 Apr - 30 Apr Icelandair
28 Apr - 05 May Icelandair
01 Apr - 15 Apr Air Canada
13 Apr - 20 Apr Icelandair
01 Apr - 15 Apr Finnair direct
01 Apr - 30 Apr United
18 Apr - 25 Apr Icelandair
14 Apr - 25 Apr Icelandair
15 Apr - 25 Apr Air Canada
01 Apr - 06 Apr Air Canada
12 Apr - 19 Apr Air Canada
26 Apr - 03 May Delta
26 Apr - 03 May British Airways direct

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

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