AirHint found the following cheapest return flights from Boston (BOS) to Calgary (YYC) in July 2025 (see full year).

Return flights

14 Jul - 21 Jul	WestJet
14 Jul - 21 Jul	WestJet	direct
16 Jul - 22 Jul	WestJet
09 Jul - 15 Jul	Delta
18 Jul - 21 Jul	WestJet	direct
18 Jul - 20 Jul	WestJet	direct
12 Jul - 20 Jul	Frontier Airlines
12 Jul - 19 Jul	Spirit Airlines
07 Jul - 13 Jul	Porter Airlines (Canada) Ltd

Also check the deals for one-way flights from Boston to Calgary in July.

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 Boston to Calgary in July from 186€

Return flights