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

Return flights

21 Apr - 20 May	Flair Airlines
08 Apr - 23 Apr	Flair Airlines
18 Apr - 25 Apr	Flair Airlines
19 Apr - 24 Apr	WestJet	direct
19 Apr - 25 Apr	Flair Airlines
28 Apr - 05 May	WestJet
22 Apr - 29 Apr	Flair Airlines
13 Apr - 18 Apr	Flair Airlines
20 Apr - 27 Apr	WestJet
10 Apr - 28 Apr	Air Canada
21 Apr - 28 Apr	WestJet	direct
25 Apr - 03 May	Air Canada
07 Apr - 14 Apr	Air Canada
23 Apr - 08 May	Flair Airlines
27 Apr - 04 May	WestJet
29 Apr - 09 May	WestJet
23 Apr - 05 May	WestJet
21 Apr - 03 May	WestJet	direct
22 Apr - 08 May	Air Canada
25 Apr - 03 May	WestJet	direct

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 484€

Return flights