AirHint found the following cheapest return flights from San Jose (SJO) to Toronto (YYZ) in September 2025 (see full year).

Return flights

27 Sep - 02 Oct	Spirit Airlines
27 Sep - 04 Oct	Spirit Airlines
25 Sep - 29 Sep	Spirit Airlines
29 Sep - 04 Oct	Volaris Costa Rica
28 Sep - 03 Oct	Volaris Costa Rica
19 Sep - 22 Sep	Copa
20 Sep - 23 Sep	Spirit Airlines
19 Sep - 26 Sep	United
29 Sep - 05 Oct	United
19 Sep - 24 Sep	United
20 Sep - 25 Sep	United
30 Sep - 05 Oct	United
24 Sep - 27 Sep	United
28 Sep - 04 Oct	United
28 Sep - 01 Oct	Air Canada
27 Sep - 30 Sep	Air Canada
26 Sep - 30 Sep	Air Canada
24 Sep - 27 Sep	Air Canada	direct

Also check the deals for one-way flights from San Jose to Toronto in September.

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 San Jose to Toronto in September from $322

Return flights