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

Return flights

07 May - 11 May	Icelandair
17 May - 26 May	Air Canada
04 May - 11 May	Icelandair
14 May - 27 May	Air Canada
14 May - 21 May	Air Canada
03 May - 10 May	Lufthansa
18 May - 26 May	Air Canada
14 May - 26 May	Icelandair
03 May - 16 May	Lufthansa
02 May - 16 May	Icelandair
19 May - 06 Jun	Icelandair
17 May - 04 Jun	Air Canada
20 May - 12 Jun	Icelandair
18 May - 02 Jun	Turkish Airlines
28 May - 06 Jun	Icelandair
21 May - 18 Jun	Icelandair
29 May - 01 Jun	Icelandair

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

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 May from $546

Return flights