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

Return flights

01 Dec - 16 Dec	Air Canada
07 Dec - 16 Dec	Air Canada
03 Dec - 09 Dec	Air Canada
02 Dec - 11 Dec	Air Canada
30 Dec - 20 Jan	British Airways
15 Dec - 26 Jan	Air Canada
01 Dec - 10 Dec	British Airways
25 Dec - 31 Dec	Air France
25 Dec - 15 Jan	Air France
01 Dec - 11 Jan	Viva Aerobus
01 Dec - 14 Dec	Viva Aerobus
02 Dec - 09 Dec	Iberia
10 Dec - 01 Jan	KLM
29 Dec - 07 Jan	Delta
27 Dec - 07 Jan	Delta
30 Dec - 13 Jan	Iberia
01 Dec - 31 Dec	Iberia
18 Dec - 28 Jan	Viva Aerobus
01 Dec - 03 Jan	Air Canada
07 Dec - 13 Dec	British Airways

Also check the deals for one-way flights from Mexico City 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 Mexico City to Barcelona in December from $683

Return flights