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

Return flights

19 Apr - 28 Apr	KLM
08 Apr - 18 Apr	Finnair
14 Apr - 28 Apr	KLM
11 Apr - 19 Apr	KLM
04 Apr - 15 Apr	KLM
25 Apr - 09 May	KLM
25 Apr - 02 May	KLM
06 Apr - 17 Apr	Air France
04 Apr - 17 Apr	KLM
16 Apr - 30 Apr	British Airways
03 Apr - 10 Apr	KLM
01 Apr - 08 Apr	British Airways
25 Apr - 09 May	WestJet	direct

Also check the deals for one-way flights from London to Calgary in April.

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 April from 615€

Return flights