Cheapest return flights from Philadelphia to Toronto in May from $322

AirHint found the following cheapest return flights from Philadelphia (PHL) to Toronto (YYZ) in May 2026 (see full year).

Return flights

30 May - 06 Jun Frontier Airlines
29 May - 31 May Frontier Airlines
30 May - 06 Jun Air Canada direct
11 May - 14 May Frontier Airlines
16 May - 18 May Frontier Airlines
12 May - 24 May Frontier Airlines
19 May - 23 May Frontier Airlines
17 May - 19 May Frontier Airlines
29 May - 31 May Air Canada direct
16 May - 18 May Air Canada direct
19 May - 22 May Air Canada direct
19 May - 23 May Air Canada direct

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

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