AirHint found the following cheapest return flights from Raleigh-durham (RDU) to Calgary (YYC) in August 2025 (see full year).

Return flights

20 Aug - 25 Aug	WestJet	direct
27 Aug - 03 Sep	WestJet	direct
29 Aug - 03 Sep	Spirit Airlines
22 Aug - 25 Aug	Delta	direct
25 Aug - 01 Sep	WestJet
29 Aug - 02 Sep	Frontier Airlines
30 Aug - 01 Sep	Frontier Airlines
01 Aug - 04 Aug	United
08 Aug - 11 Aug	United
01 Aug - 08 Aug	Frontier Airlines
08 Aug - 11 Aug	WestJet	direct

Also check the deals for one-way flights from Raleigh-durham to Calgary in August.

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 Raleigh-durham to Calgary in August from 156€

Return flights