AirHint found the following cheapest return flights from Calgary (YYC) to London (LHR) in August 2026 (see full year).

Return flights

12 Aug - 17 Aug	British Airways
04 Aug - 13 Aug	Finnair
16 Aug - 27 Aug	WestJet
30 Aug - 05 Sep	Finnair
17 Aug - 08 Sep	Air Canada
26 Aug - 02 Sep	Lufthansa
16 Aug - 27 Aug	WestJet	direct
12 Aug - 17 Aug	WestJet	direct
26 Aug - 02 Sep	WestJet	direct
04 Aug - 13 Aug	WestJet	direct
05 Aug - 27 Aug	WestJet
30 Aug - 05 Sep	WestJet	direct
07 Aug - 27 Aug	WestJet

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

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 August from $921

Return flights