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

Return flights

20 Apr - 26 Apr	WestJet	direct
19 Apr - 22 Apr	WestJet	direct
13 Apr - 22 Apr	WestJet	direct
06 Apr - 23 Apr	WestJet	direct
06 Apr - 16 Apr	WestJet	direct
25 Apr - 08 May	WestJet
22 Apr - 04 May	WestJet
23 Apr - 05 May	WestJet
20 Apr - 01 May	WestJet
08 Apr - 08 May	Flair Airlines
04 Apr - 11 Apr	WestJet
08 Apr - 22 Apr	Air France
04 Apr - 11 Apr	WestJet	direct
10 Apr - 19 Apr	Virgin Atlantic
10 Apr - 13 Apr	Virgin Atlantic
30 Apr - 18 May	WestJet	direct
30 Apr - 19 May	WestJet	direct
30 Apr - 20 May	WestJet	direct
25 Apr - 02 May	KLM
29 Apr - 23 May	Air France

Also check the deals for one-way flights from Calgary to London 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 Calgary to London in April from 463€

Return flights