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

Return flights

04 May - 14 May	Icelandair
04 May - 11 May	Icelandair
12 May - 17 May	Icelandair
17 May - 24 May	Icelandair
05 May - 14 May	Icelandair
13 May - 23 May	Icelandair
08 May - 22 May	Icelandair
19 May - 28 May	Icelandair
01 May - 31 May	Frontier Airlines
08 May - 31 May	Frontier Airlines
17 May - 04 Jun	Icelandair
28 May - 02 Jun	jetBlue
26 May - 02 Jun	Icelandair
21 May - 18 Jun	Icelandair
25 May - 11 Jun	Icelandair
28 May - 01 Jun	jetBlue
29 May - 02 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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Denver to London in May from 501€

Return flights