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

Return flights

23 Jul - 28 Jul	WestJet
01 Jul - 05 Jul	WestJet
24 Jul - 26 Aug	WestJet
11 Jul - 27 Jul	WestJet
25 Jul - 11 Aug	WestJet
25 Jul - 06 Aug	WestJet
25 Jul - 01 Aug	WestJet
22 Jul - 27 Jul	WestJet
08 Jul - 16 Jul	WestJet
10 Jul - 16 Jul	WestJet
29 Jul - 05 Aug	WestJet
29 Jul - 11 Aug	WestJet
23 Jul - 02 Aug	WestJet
02 Jul - 05 Jul	WestJet
18 Jul - 23 Jul	WestJet
01 Jul - 07 Jul	WestJet
10 Jul - 17 Jul	Flair Airlines
30 Jul - 06 Aug	WestJet
17 Jul - 07 Aug	WestJet
31 Jul - 05 Aug	WestJet

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 $811

Return flights