Cheapest return flights from Philadelphia to Toronto in May from $321

Best time to book flights for Philadelphia (PHL) to Toronto (YYZ) flights at AirHint

AirHint found the following cheapest return flights from Philadelphia (PHL) to Toronto (YYZ) in May 2025 (see full year).

Return flights

09 May - 11 May Frontier Airlines
15 May - 19 May Spirit Airlines
29 May - 01 Jun Frontier Airlines
15 May - 18 May Spirit Airlines
16 May - 19 May Spirit Airlines
09 May - 12 May Frontier Airlines
20 May - 25 May Spirit Airlines
21 May - 25 May Spirit Airlines
19 May - 22 May Frontier Airlines
22 May - 25 May Frontier Airlines
18 May - 25 May American Airlines

Also check the deals for one-way flights from Philadelphia to Toronto in May.

Skyscanner

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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