AirHint found the following cheapest return flights from Calgary (YYC) to London (LHR) in May 2026 (see full year).

Return flights

19 May - 02 Jun	Air Canada
15 May - 01 Jun	Air Canada
06 May - 30 May	Lufthansa
09 May - 30 May	Lufthansa
08 May - 30 May	Lufthansa
10 May - 30 May	Lufthansa
08 May - 16 May	Lufthansa
02 May - 09 May	Lufthansa
13 May - 19 May	Air Canada
20 May - 31 May	Air Canada
11 May - 20 May	Air Canada
01 May - 08 May	Lufthansa
26 May - 20 Jun	Air Canada
20 May - 13 Jun	Air Canada	direct
15 May - 06 Jun	Air Canada
28 May - 10 Jun	Air Canada	direct
28 May - 06 Jun	Air Canada
29 May - 20 Jun	Air Canada
29 May - 06 Jun	Air Canada
26 May - 20 Jun	WestJet	direct

Also check the deals for one-way flights from Calgary 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 Calgary to London in May from 503€

Return flights