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

Return flights

12 Jul - 22 Jul	KLM
13 Jul - 25 Jul	KLM
12 Jul - 25 Jul	KLM
09 Jul - 17 Jul	Air France
09 Jul - 22 Jul	Air France
09 Jul - 16 Jul	Air France
12 Jul - 16 Jul	KLM
14 Jul - 22 Jul	KLM
10 Jul - 30 Jul	British Airways
16 Jul - 25 Aug	British Airways
08 Jul - 22 Jul	KLM
13 Jul - 05 Aug	KLM
12 Jul - 05 Aug	KLM
10 Jul - 11 Aug	Air France
12 Jul - 02 Aug	KLM
14 Jul - 05 Aug	KLM
14 Jul - 04 Aug	KLM
09 Jul - 14 Aug	KLM
10 Jul - 14 Aug	Air France
14 Jul - 03 Aug	KLM

Also check the deals for one-way flights from London to Calgary 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 London to Calgary in July from 640€

Return flights