AirHint found the following cheapest return flights from Ottawa (YOW) to Paris (CDG) in September 2025 (see full year).

Return flights

08 Sep - 15 Sep	WestJet
18 Sep - 26 Sep	Lufthansa
19 Sep - 26 Sep	Lufthansa
30 Sep - 08 Oct	Lufthansa
25 Sep - 01 Oct	WestJet
09 Sep - 17 Sep	Air Canada
09 Sep - 16 Sep	Air Canada
08 Sep - 22 Sep	Air Canada
15 Sep - 15 Oct	Lufthansa
18 Sep - 03 Oct	Air Canada
16 Sep - 01 Oct	Air Canada
28 Sep - 12 Oct	Air Canada
27 Sep - 06 Oct	Air Canada
27 Sep - 07 Oct	Air Canada
28 Sep - 07 Oct	Air Canada
25 Sep - 10 Oct	Air Canada
05 Sep - 10 Sep	Air Canada
05 Sep - 27 Sep	Air Canada
09 Sep - 13 Sep	Air Canada
17 Sep - 24 Sep	WestJet

Also check the deals for one-way flights from Ottawa to Paris 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 Ottawa to Paris in September from $552

Return flights