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

Return flights

03 Jul - 04 Aug	KLM
01 Jul - 08 Jul	Delta
04 Jul - 13 Jul	KLM
02 Jul - 12 Jul	Virgin Atlantic
09 Jul - 17 Jul	KLM
03 Jul - 17 Jul	KLM
01 Jul - 13 Jul	KLM
03 Jul - 13 Jul	KLM
03 Jul - 14 Jul	Virgin Atlantic
09 Jul - 23 Jul	Virgin Atlantic
01 Jul - 09 Jul	Virgin Atlantic
03 Jul - 27 Aug	Lufthansa
01 Jul - 01 Aug	Lufthansa	direct
03 Jul - 04 Aug	Lufthansa	direct
14 Jul - 02 Aug	Lufthansa
14 Jul - 06 Aug	Lufthansa
23 Jul - 06 Aug	Virgin Atlantic
11 Jul - 01 Aug	Air Canada
27 Jul - 03 Aug	Virgin Atlantic
09 Jul - 16 Aug	Delta

Also check the deals for one-way flights from London to Montreal 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 Montreal in July from $556

Return flights