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

Return flights

06 Apr - 27 Apr	WestJet	direct
07 Apr - 13 Apr	WestJet	direct
04 Apr - 17 Apr	Delta
19 Apr - 09 May	WestJet	direct
24 Apr - 11 May	WestJet	direct
21 Apr - 03 May	WestJet	direct
08 Apr - 15 Apr	Delta
04 Apr - 17 Apr	WestJet	direct
24 Apr - 10 May	WestJet	direct
25 Apr - 10 May	WestJet	direct
01 Apr - 12 Apr	Air Canada
08 Apr - 15 Apr	WestJet	direct
01 Apr - 12 Apr	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 $660

Return flights