Cheapest return flights from Denver to Calgary in September from $123

AirHint found the following cheapest return flights from Denver (DEN) to Calgary (YYC) in September 2025 (see full year).

Return flights

18 Sep - 21 Sep WestJet direct
25 Sep - 28 Sep WestJet direct
22 Sep - 25 Sep WestJet direct
24 Sep - 28 Sep Frontier Airlines
23 Sep - 30 Sep Alaska Airlines
04 Sep - 07 Sep WestJet direct
06 Sep - 07 Sep Delta
24 Sep - 28 Sep Lufthansa direct
23 Sep - 30 Sep Lufthansa direct
06 Sep - 07 Sep Lufthansa direct

Also check the deals for one-way flights from Denver to Calgary in September.

Skyscanner

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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