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

Return flights

06 Dec - 01 Jan	Iberia
01 Dec - 13 Dec	Viva
05 Dec - 12 Dec	Finnair
16 Dec - 06 Jan	Finnair
09 Dec - 22 Dec	Iberia
17 Dec - 31 Dec	Viva
16 Dec - 28 Dec	Lufthansa
06 Dec - 02 Jan	Finnair
21 Dec - 28 Dec	British Airways
18 Dec - 26 Dec	Lufthansa
18 Dec - 21 Dec	Finnair
20 Dec - 03 Jan	Air France

Also check the deals for one-way flights from Mexico City to Helsinki 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 Helsinki in December from $1064

Return flights