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

Return flights

03 May - 07 May	Air France
07 May - 16 May	KLM
01 May - 29 May	Air France
01 May - 15 May	Air France
20 May - 30 May	KLM
17 May - 29 May	KLM
01 May - 21 May	KLM
04 May - 29 May	KLM
04 May - 11 May	KLM
15 May - 24 May	Virgin Atlantic
03 May - 02 Jun	Air Canada
19 May - 16 Jun	Air Canada	direct
19 May - 09 Jun	Air Canada
17 May - 07 Jun	Porter Airlines (Canada) Ltd
11 May - 05 Jun	Air Canada
18 May - 03 Jun	Air Canada
20 May - 03 Jun	Air Canada	direct
22 May - 05 Jun	WestJet
25 May - 05 Jun	Air Canada
24 May - 03 Jun	Air Canada	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 528€

Return flights