Cheapest return flights from Ontario to Barcelona in August from $754

Best time to book flights for Ontario (ONT) to Barcelona (BCN) flights at AirHint

AirHint found the following cheapest return flights from Ontario (ONT) to Barcelona (BCN) in August 2025 (see full year).

Return flights

25 Aug - 05 Sep Delta
19 Aug - 09 Sep British Airways
24 Aug - 07 Sep Iberia
05 Aug - 22 Aug KLM
17 Aug - 26 Aug KLM
03 Aug - 20 Aug KLM
12 Aug - 20 Aug British Airways
11 Aug - 19 Aug British Airways
14 Aug - 28 Aug KLM
24 Aug - 01 Sep British Airways
27 Aug - 16 Sep British Airways
20 Aug - 30 Aug British Airways
21 Aug - 25 Aug KLM
22 Aug - 30 Aug British Airways
21 Aug - 29 Aug British Airways
28 Aug - 17 Sep Iberia
28 Aug - 09 Sep Iberia
28 Aug - 18 Sep Iberia
27 Aug - 10 Sep Iberia
30 Aug - 20 Sep Iberia

Also check the deals for one-way flights from Ontario to Barcelona in August.

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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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