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

Return flights

10 Oct - 21 Oct	Aeromexico
17 Oct - 22 Oct	Aeromexico
10 Oct - 20 Oct	Aeromexico
20 Oct - 23 Oct	Aeromexico
04 Oct - 18 Oct	Aeromexico
31 Oct - 07 Nov	Viva
13 Oct - 21 Oct	Aeromexico
06 Oct - 21 Oct	Volaris
02 Oct - 09 Oct	Aeromexico
01 Oct - 10 Oct	Aeromexico
01 Oct - 12 Oct	Aeromexico
23 Oct - 04 Nov	Viva
29 Oct - 08 Nov	Viva
21 Oct - 26 Nov	Volaris
31 Oct - 09 Nov	Viva
18 Oct - 01 Nov	Avianca
17 Oct - 01 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 $592

Return flights