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

Return flights

15 Dec - 08 Jan	WestJet	direct
10 Dec - 15 Dec	WestJet
11 Dec - 15 Dec	WestJet
10 Dec - 12 Dec	WestJet
25 Dec - 09 Jan	United	direct
18 Dec - 07 Jan	WestJet	direct
10 Dec - 18 Dec	WestJet	direct
10 Dec - 17 Dec	WestJet	direct
13 Dec - 17 Dec	WestJet
19 Dec - 13 Jan	WestJet
15 Dec - 22 Dec	WestJet
10 Dec - 15 Dec	WestJet	direct
24 Dec - 08 Jan	WestJet
24 Dec - 14 Jan	WestJet
22 Dec - 08 Jan	WestJet	direct
24 Dec - 07 Jan	WestJet
23 Dec - 08 Jan	WestJet	direct
08 Dec - 18 Dec	WestJet
24 Dec - 14 Jan	Air Canada	direct
15 Dec - 22 Dec	WestJet	direct

Also check the deals for one-way flights from Calgary to Houston 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 Calgary to Houston in December from 132€

Return flights