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

Return flights

04 Dec - 11 Dec	WestJet	direct
03 Dec - 10 Dec	WestJet	direct
12 Dec - 15 Dec	Frontier Airlines
13 Dec - 16 Dec	Frontier Airlines
12 Dec - 16 Dec	Frontier Airlines
04 Dec - 08 Dec	United	direct
03 Dec - 07 Dec	WestJet
11 Dec - 14 Dec	Frontier Airlines
11 Dec - 15 Dec	WestJet	direct
03 Dec - 07 Dec	United	direct
17 Dec - 05 Jan	Spirit Airlines
26 Dec - 02 Jan	WestJet	direct
30 Dec - 06 Jan	WestJet	direct
27 Dec - 02 Jan	Spirit Airlines
17 Dec - 05 Jan	WestJet	direct
27 Dec - 03 Jan	Spirit Airlines

Also check the deals for one-way flights from Houston to Calgary in December.

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 December from 147€

Return flights