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

Return flights

30 Sep - 03 Oct	WestJet
29 Sep - 02 Oct	WestJet
28 Sep - 02 Oct	WestJet
28 Sep - 06 Oct	WestJet
28 Sep - 01 Oct	WestJet
21 Sep - 23 Sep	WestJet
27 Sep - 01 Oct	WestJet
29 Sep - 02 Oct	WestJet	direct
21 Sep - 26 Sep	WestJet
27 Sep - 29 Sep	WestJet
19 Sep - 22 Sep	WestJet
19 Sep - 26 Sep	Flair Airlines
25 Sep - 27 Sep	WestJet
21 Sep - 28 Sep	WestJet
26 Sep - 28 Oct	WestJet
25 Sep - 30 Sep	WestJet
26 Sep - 29 Sep	Flair Airlines
20 Sep - 21 Sep	WestJet
28 Sep - 02 Oct	WestJet	direct
27 Sep - 18 Oct	Delta

Also check the deals for one-way flights from Calgary to Las Vegas 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 Calgary to Las Vegas in September from 117€

Return flights