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

One-Way flights

06 Aug	Spirit Airlines
27 Aug	Spirit Airlines
25 Aug	Spirit Airlines
13 Aug	Spirit Airlines
05 Aug	Spirit Airlines
25 Aug	Air Canada	direct
05 Aug	Air Canada	direct
07 Aug	Air Canada	direct
08 Aug	Air Canada	direct
06 Aug	Air Canada	direct

Also check the deals for return 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 one-way flights from Philadelphia to Montreal in August from $157

One-Way flights