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

Return flights

04 Sep - 11 Sep	WestJet
05 Sep - 12 Sep	WestJet
07 Sep - 14 Sep	WestJet
20 Sep - 24 Sep	WestJet
20 Sep - 27 Sep	WestJet
26 Sep - 03 Oct	WestJet
30 Sep - 08 Oct	WestJet
30 Sep - 07 Oct	WestJet
28 Sep - 05 Oct	WestJet
18 Sep - 25 Sep	WestJet
06 Sep - 13 Sep	WestJet
09 Sep - 16 Sep	WestJet
11 Sep - 18 Sep	WestJet
13 Sep - 20 Sep	WestJet
24 Sep - 01 Oct	WestJet
25 Sep - 02 Oct	WestJet
27 Sep - 04 Oct	WestJet
29 Sep - 06 Oct	WestJet
29 Sep - 05 Oct	WestJet
24 Sep - 01 Oct	WestJet	direct

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

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 Atlanta to Calgary in September from 134€

Return flights