AirHint found the following cheapest return flights from Mexico City (MEX) to Keflavik (KEF) in October 2025 (see full year).

Return flights

17 Oct - 22 Oct	Aeromexico
01 Oct - 14 Oct	Aeromexico
13 Oct - 21 Oct	Aeromexico
15 Oct - 24 Oct	Aeromexico
03 Oct - 15 Oct	Aeromexico
15 Oct - 20 Oct	Aeromexico
04 Oct - 14 Oct	Aeromexico
04 Oct - 15 Oct	Aeromexico
15 Oct - 23 Oct	Aeromexico
06 Oct - 17 Oct	Volaris
22 Oct - 03 Nov	Volaris
25 Oct - 05 Nov	Viva
23 Oct - 02 Nov	Viva
24 Oct - 04 Nov	Viva
18 Oct - 01 Nov	Viva
23 Oct - 03 Nov	Aeromexico
23 Oct - 01 Nov	Aeromexico
31 Oct - 09 Nov	Aeromexico
27 Oct - 07 Nov	Aeromexico
31 Oct - 10 Nov	Aeromexico

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

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 October from 582€

Return flights