AirHint found the following cheapest return flights from Toronto (YTZ) to Barcelona (BCN) in December 2025 (see full year).

Return flights

10 Dec - 18 Dec	Air Canada
05 Dec - 27 Dec	Air Canada
01 Dec - 08 Dec	Air Canada
15 Dec - 31 Dec	Air Canada
16 Dec - 29 Dec	Air Canada
16 Dec - 10 Jan	Air Canada
16 Dec - 06 Jan	Air Canada
07 Dec - 14 Dec	Porter Airlines (Canada) Ltd
28 Dec - 05 Jan	Air Canada
28 Dec - 04 Jan	Porter Airlines (Canada) Ltd
06 Dec - 08 Dec	SWISS
20 Dec - 03 Jan	Porter Airlines (Canada) Ltd
19 Dec - 05 Jan	Air Canada

Also check the deals for one-way flights from Toronto to Barcelona in December.

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 Toronto to Barcelona in December from $613

Return flights