AirHint found the following cheapest return flights from Philadelphia (PHL) to Montreal (YUL) in August 2025 (see full year).

Return flights

13 Aug - 20 Aug	Spirit Airlines
11 Aug - 18 Aug	Spirit Airlines
07 Aug - 14 Aug	Spirit Airlines
10 Aug - 17 Aug	Spirit Airlines
21 Aug - 24 Aug	Air Canada	direct
29 Aug - 02 Sep	Air Canada	direct
16 Aug - 17 Aug	Air Canada
16 Aug - 17 Aug	Air Canada	direct
08 Aug - 15 Aug	Spirit Airlines
10 Aug - 17 Aug	Air Canada	direct
11 Aug - 18 Aug	Air Canada	direct

Also check the deals for one-way flights from Philadelphia to Montreal 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 Philadelphia to Montreal in August from 246€

Return flights