Cheapest one-way flights from Washington to Toronto in May from $79

AirHint found the following cheapest one-way flights from Washington (IAD) to Toronto (YYZ) in May 2026 (see full year).

One-Way flights

04 May Air Canada direct
12 May Air Canada direct
03 May Frontier Airlines
25 May Air Canada direct
07 May Air Canada direct
03 May Air Canada direct
17 May United direct
20 May United direct
18 May WestJet
18 May United direct

Also check the deals for return flights from Washington to Toronto in May.

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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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