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

Return flights

24 Sep - 16 Oct	Air Transat
23 Sep - 30 Sep	Air Transat
16 Sep - 25 Sep	Air Transat
16 Sep - 24 Sep	Air Transat
16 Sep - 23 Sep	Air Transat
24 Sep - 11 Oct	Porter Airlines (Canada) Ltd
29 Sep - 06 Oct	Air Canada
30 Sep - 07 Oct	Air Canada
28 Sep - 06 Oct	Air Canada
23 Sep - 07 Oct	Air Canada
23 Sep - 19 Oct	Air Canada
23 Sep - 04 Oct	Air Canada
23 Sep - 18 Oct	Air Canada
12 Sep - 20 Sep	Air Canada
07 Sep - 14 Sep	Air Transat

Also check the deals for one-way flights from Ottawa to Amsterdam 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.

Book a cheap hotel in Amsterdam

Cheap car rent in Amsterdam

Cheapest return flights from Ottawa to Amsterdam in September from $470

Return flights