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

Return flights

20 Aug - 22 Aug	WestJet	direct
25 Aug - 31 Aug	WestJet	direct
19 Aug - 25 Aug	WestJet	direct
20 Aug - 27 Aug	WestJet	direct
30 Aug - 06 Sep	Frontier Airlines
22 Aug - 28 Aug	Frontier Airlines
22 Aug - 26 Aug	Frontier Airlines
28 Aug - 31 Aug	Spirit Airlines
22 Aug - 24 Aug	Frontier Airlines
28 Aug - 01 Sep	Spirit Airlines
29 Aug - 01 Sep	Spirit Airlines
17 Aug - 21 Aug	Frontier Airlines
22 Aug - 28 Aug	WestJet	direct
28 Aug - 01 Sep	WestJet	direct
29 Aug - 01 Sep	Air Canada	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 183€

Return flights