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

Return flights

04 May - 17 May	KLM
08 May - 15 May	KLM
01 May - 11 May	KLM
07 May - 18 May	KLM
04 May - 18 May	KLM
04 May - 15 May	KLM
04 May - 13 May	KLM
04 May - 11 May	KLM
04 May - 10 May	KLM
02 May - 12 May	KLM
30 May - 06 Jun	KLM
23 May - 01 Jun	KLM
25 May - 07 Jun	KLM
25 May - 08 Jun	KLM
31 May - 07 Jun	KLM
25 May - 15 Jun	KLM
25 May - 16 Jun	KLM
25 May - 08 Jun	WestJet	direct
25 May - 16 Jun	WestJet	direct
25 May - 07 Jun	WestJet	direct

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 595€

Return flights