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

Return flights

27 May - 03 Jun	Delta
01 May - 07 May	Delta
01 May - 04 May	Delta
04 May - 11 May	Delta
26 May - 10 Jun	KLM
08 May - 24 May	SWISS
22 May - 26 May	Delta
21 May - 30 May	KLM
20 May - 31 May	Delta
25 May - 05 Jun	Virgin Atlantic
25 May - 04 Jun	Virgin Atlantic
01 May - 09 May	Delta
28 May - 11 Jun	Delta
22 May - 31 May	Delta
08 May - 15 May	KLM
25 May - 01 Jun	Delta
20 May - 02 Jun	SWISS
19 May - 01 Jun	KLM
31 May - 09 Jun	ITA Airways
31 May - 13 Jun	ITA 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 $792

Return flights