AirHint found the following cheapest return flights from Ontario (ONT) to Delhi (DEL) in September 2025 (see full year).

Return flights

03 Sep - 10 Sep	Delta
22 Sep - 29 Sep	Air India
07 Sep - 30 Sep	Air India
17 Sep - 24 Sep	Air India
10 Sep - 17 Sep	Air India
09 Sep - 26 Sep	KLM
08 Sep - 26 Sep	KLM
09 Sep - 16 Sep	KLM
03 Sep - 19 Sep	KLM
18 Sep - 25 Sep	British Airways
29 Sep - 14 Oct	British Airways
29 Sep - 06 Oct	British Airways
28 Sep - 13 Oct	Etihad Airways
19 Sep - 01 Oct	Etihad Airways
13 Sep - 11 Oct	Etihad Airways
28 Sep - 05 Oct	British Airways
13 Sep - 20 Oct	Etihad Airways
26 Sep - 15 Oct	Etihad Airways
28 Sep - 12 Oct	China Airlines
26 Sep - 03 Oct	Etihad Airways

Also check the deals for one-way flights from Ontario to Delhi 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 Ontario to Delhi in September from $720

Return flights