AirHint found the following cheapest return flights from Washington (DCA) to Toronto (YYZ) in August 2025 (see full year).

Return flights

18 Aug - 25 Aug	Air Canada
20 Aug - 23 Aug	Air Canada
13 Aug - 20 Aug	Air Canada
20 Aug - 23 Aug	Air Canada	direct
10 Aug - 17 Aug	Air Canada	direct
12 Aug - 15 Aug	Air Canada	direct
11 Aug - 18 Aug	Air Canada
17 Aug - 21 Aug	Delta
19 Aug - 22 Aug	Delta
19 Aug - 22 Aug	Air Canada	direct
30 Aug - 01 Sep	Air Canada	direct
28 Aug - 01 Sep	Delta
29 Aug - 01 Sep	Air Canada	direct
28 Aug - 01 Sep	Air Canada	direct

Also check the deals for one-way flights from Washington to Toronto 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 return flights from Washington to Toronto in August from 174€

Return flights