Cheapest return flights from Ontario to Barcelona in October from $675

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 October 2025 (see full year).

Return flights

07 Oct - 14 Oct British Airways
04 Oct - 15 Oct Iberia
16 Oct - 06 Nov British Airways
08 Oct - 15 Oct British Airways
29 Oct - 05 Nov KLM
26 Oct - 05 Nov KLM
28 Oct - 04 Nov KLM
01 Oct - 12 Oct British Airways
30 Oct - 11 Nov KLM
15 Oct - 22 Oct jetBlue
03 Oct - 10 Oct Iberia
09 Oct - 15 Oct Iberia
06 Oct - 20 Oct Iberia
11 Oct - 19 Oct Iberia
10 Oct - 18 Oct jetBlue
23 Oct - 06 Nov British Airways
27 Oct - 03 Nov KLM
26 Oct - 09 Nov KLM
11 Oct - 01 Nov KLM

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

Skyscanner

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 Barcelona

Cheap car rent in Barcelona