AirHint found the following cheapest return flights from Calgary (YYC) to London (LHR) in July 2025 (see full year).

Return flights

29 Jul - 21 Aug	WestJet
28 Jul - 19 Aug	WestJet
22 Jul - 12 Aug	WestJet
22 Jul - 13 Aug	WestJet
26 Jul - 07 Aug	Air Canada
31 Jul - 14 Aug	Air Canada
24 Jul - 13 Aug	Finnair
11 Jul - 11 Aug	Finnair
11 Jul - 17 Jul	Finnair
31 Jul - 12 Aug	Finnair
15 Jul - 11 Aug	Finnair
14 Jul - 21 Jul	British Airways
11 Jul - 14 Jul	Delta
11 Jul - 15 Jul	Delta
17 Jul - 22 Jul	Delta
12 Jul - 19 Jul	Virgin Atlantic
15 Jul - 22 Jul	Delta
17 Jul - 21 Jul	British Airways
19 Jul - 24 Jul	Iberia
12 Jul - 24 Jul	Iberia

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

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 July from $761

Return flights