AirHint found the following cheapest return flights from Houston (HOU) to Calgary (YYC) in August 2025 (see full year).

Return flights

15 Aug - 22 Aug	Air Canada
11 Aug - 18 Aug	Air Canada
13 Aug - 20 Aug	Air Canada
08 Aug - 15 Aug	Air Canada
23 Aug - 26 Aug	Air Canada
10 Aug - 17 Aug	Air Canada
13 Aug - 19 Aug	Air Canada
20 Aug - 24 Aug	Frontier Airlines
27 Aug - 31 Aug	Spirit Airlines
18 Aug - 25 Aug	Spirit Airlines
30 Aug - 06 Sep	Spirit Airlines
22 Aug - 01 Sep	Frontier Airlines
29 Aug - 01 Sep	Spirit Airlines
30 Aug - 06 Sep	WestJet	direct
22 Aug - 01 Sep	WestJet	direct
29 Aug - 01 Sep	WestJet	direct

Also check the deals for one-way flights from Houston to Calgary 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 Houston to Calgary in August from 185€

Return flights