AirHint found the following cheapest return flights from Mexico City (MEX) to Keflavik (KEF) in March 2026 (see full year).

Return flights

08 Mar - 16 Mar	Aer Lingus
02 Mar - 11 Mar	Viva
15 Mar - 23 Mar	Aer Lingus
09 Mar - 24 Mar	Aer Lingus
11 Mar - 24 Mar	Aer Lingus
09 Mar - 22 Mar	Aer Lingus
09 Mar - 17 Mar	SWISS
02 Mar - 14 Mar	SWISS
24 Mar - 06 Apr	Aeromexico
22 Mar - 15 Apr	Aer Lingus
16 Mar - 24 Mar	Aeromexico
14 Mar - 24 Mar	Aer Lingus
27 Mar - 06 Apr	Viva
31 Mar - 14 Apr	Aeromexico
31 Mar - 10 Apr	Frontier Airlines
28 Mar - 09 Apr	Frontier Airlines
27 Mar - 05 Apr	Viva
28 Mar - 08 Apr	Frontier Airlines
25 Mar - 05 Apr	Aeromexico
25 Mar - 04 Apr	Aeromexico

Also check the deals for one-way flights from Mexico City to Keflavik in March.

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 Keflavik in March from $809

Return flights