Cheapest return flights from Washington to Calgary in May from $217

AirHint found the following cheapest return flights from Washington (IAD) to Calgary (YYC) in May 2026 (see full year).

Return flights

15 May - 18 May WestJet direct
02 May - 06 May Frontier Airlines
24 May - 28 May United
01 May - 06 May Porter Airlines (Canada) Ltd
01 May - 07 May Porter Airlines (Canada) Ltd
04 May - 07 May Porter Airlines (Canada) Ltd
04 May - 06 May United
02 May - 05 May Delta
01 May - 05 May Delta
22 May - 25 May Frontier Airlines

Also check the deals for one-way flights from Washington to Calgary in May.

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