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

Return flights

02 May - 16 May	KLM
01 May - 15 May	KLM
04 May - 15 May	Finnair
08 May - 17 May	Finnair
15 May - 22 May	KLM
11 May - 18 May	KLM
18 May - 31 May	KLM
12 May - 26 May	KLM
06 May - 20 May	KLM
25 May - 01 Jun	KLM
23 May - 01 Jun	KLM
01 May - 09 May	KLM
25 May - 08 Jun	KLM
25 May - 06 Jun	KLM
30 May - 08 Jun	KLM
14 May - 11 Jun	KLM
28 May - 06 Jun	KLM
10 May - 07 Jun	KLM
23 May - 07 Jun	KLM
21 May - 04 Jun	British Airways

Also check the deals for one-way flights from London to Calgary 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 London to Calgary in May from 615€

Return flights