Cheapest return flights from Newark to Ottawa in September from $319

Best time to book flights for Newark (EWR) to Ottawa (YOW) flights at AirHint

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

Return flights

15 Sep - 03 Oct Porter Airlines (Canada) Ltd direct
15 Sep - 02 Oct Porter Airlines (Canada) Ltd direct
10 Sep - 12 Sep Porter Airlines (Canada) Ltd direct
10 Sep - 13 Sep Porter Airlines (Canada) Ltd direct

Also check the deals for one-way flights from Newark to Ottawa in September.

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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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