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

Return flights

29 Jun - 05 Jul	WestJet
17 Jun - 23 Jun	WestJet
29 Jun - 03 Jul	WestJet
16 Jun - 26 Jun	WestJet
19 Jun - 26 Jun	WestJet
30 Jun - 05 Jul	WestJet
19 Jun - 23 Jun	WestJet
29 Jun - 30 Jun	WestJet
16 Jun - 18 Jun	WestJet
29 Jun - 11 Jul	WestJet
20 Jun - 23 Jun	WestJet
23 Jun - 10 Jul	WestJet
30 Jun - 03 Jul	WestJet
20 Jun - 22 Jun	WestJet
30 Jun - 10 Jul	WestJet
18 Jun - 04 Jul	WestJet
27 Jun - 06 Jul	WestJet
28 Jun - 01 Jul	WestJet
26 Jun - 29 Jun	WestJet
25 Jun - 28 Jun	Porter Airlines (Canada) Ltd

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

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 June from $611

Return flights