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

Return flights

05 Jul - 12 Jul	Porter Airlines (Canada) Ltd
20 Jul - 24 Jul	WestJet
25 Jul - 27 Jul	WestJet	direct
16 Jul - 21 Jul	WestJet	direct
30 Jul - 02 Aug	WestJet	direct
24 Jul - 26 Jul	Porter Airlines (Canada) Ltd
13 Jul - 25 Jul	WestJet	direct
12 Jul - 24 Jul	Porter Airlines (Canada) Ltd
17 Jul - 21 Jul	WestJet
31 Jul - 04 Aug	Porter Airlines (Canada) Ltd

Also check the deals for one-way flights from Calgary to Boston 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 Calgary to Boston in July from $252

Return flights