AirHint found the following cheapest return flights from Ottawa (YOW) to Barcelona (BCN) in October 2025 (see full year).

Return flights

27 Oct - 22 Nov	Air Canada
22 Oct - 29 Oct	Air Canada
10 Oct - 23 Oct	Porter Airlines (Canada) Ltd
18 Oct - 28 Oct	Porter Airlines (Canada) Ltd
10 Oct - 24 Oct	Air Canada
17 Oct - 19 Oct	Air Transat
09 Oct - 19 Oct	Porter Airlines (Canada) Ltd
01 Oct - 08 Oct	Lufthansa

Also check the deals for one-way flights from Ottawa to Barcelona in October.

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 Barcelona in October from 511€

Return flights