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

Return flights

15 Sep - 22 Sep	Porter Airlines (Canada) Ltd
02 Sep - 06 Sep	Flair Airlines
03 Sep - 05 Sep	TAP
28 Sep - 11 Oct	WestJet
04 Sep - 01 Oct	Flair Airlines
03 Sep - 17 Sep	Delta
04 Sep - 18 Sep	Air France
02 Sep - 08 Sep	Air France
01 Sep - 30 Sep	Air France
17 Sep - 30 Sep	Delta
04 Sep - 30 Sep	Air France
03 Sep - 10 Sep	Delta
27 Sep - 11 Oct	Air France
15 Sep - 05 Oct	Air France
13 Sep - 05 Oct	Air France
15 Sep - 22 Oct	Air France
15 Sep - 27 Oct	Air France
15 Sep - 01 Oct	Delta
11 Sep - 15 Oct	WestJet
25 Sep - 06 Oct	KLM

Also check the deals for one-way flights from Toronto to Warsaw 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 Toronto to Warsaw in September from 528€

Return flights