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

Return flights

02 Jun - 10 Jun	Iberia	direct
03 Jun - 13 Jun	SWISS
30 Jun - 25 Jul	Air Canada
16 Jun - 30 Jun	Air Canada
16 Jun - 30 Jun	British Airways	direct
30 Jun - 14 Jul	Lufthansa
10 Jun - 01 Jul	Air Canada
26 Jun - 14 Jul	Air Canada
02 Jun - 27 Jun	Air Canada
03 Jun - 27 Jun	Iberia	direct
03 Jun - 27 Jun	Air Canada
02 Jun - 27 Jun	Iberia	direct
25 Jun - 08 Jul	British Airways	direct
25 Jun - 09 Jul	British Airways	direct
10 Jun - 01 Jul	American Airlines	direct
23 Jun - 18 Jul	Lufthansa
24 Jun - 18 Jul	Lufthansa
18 Jun - 11 Jul	WestJet
03 Jun - 13 Jun	Austrian Airlines	direct

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

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 June from $841

Return flights