Cheapest one-way flights from St. Louis to Toronto in May from $177

Best time to book flights for St. Louis (STL) to Toronto (YYZ) flights at AirHint

AirHint found the following cheapest one-way flights from St. Louis (STL) to Toronto (YYZ) in May 2025 (see full year).

One-Way flights

17 May Air Canada direct
26 May Air Canada direct
21 May Delta
18 May Delta
20 May Delta
22 May Southern Airways Express
23 May WestJet
14 May Frontier Airlines
12 May Frontier Airlines
13 May Frontier Airlines

Also check the deals for return flights from St. Louis 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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