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

Return flights

03 Apr - 11 Apr	WestJet
03 Apr - 21 Apr	WestJet	direct
08 Apr - 22 Apr	WestJet	direct
03 Apr - 10 Apr	WestJet	direct
14 Apr - 27 Apr	WestJet	direct
20 Apr - 04 May	WestJet	direct
05 Apr - 25 Apr	WestJet	direct
15 Apr - 09 May	WestJet	direct
01 Apr - 30 Apr	Delta
25 Apr - 02 May	Delta
09 Apr - 02 May	KLM
09 Apr - 02 May	WestJet	direct
25 Apr - 02 May	WestJet	direct
02 Apr - 06 Apr	Air Canada
03 Apr - 11 Apr	WestJet	direct
02 Apr - 06 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 538€

Return flights