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

Return flights

30 Aug - 16 Sep	Aeromexico
31 Aug - 12 Sep	Viva
26 Aug - 05 Sep	Volaris
24 Aug - 12 Sep	Volaris
18 Aug - 28 Aug	Viva
07 Aug - 09 Sep	Volaris
17 Aug - 31 Aug	Volaris
24 Aug - 01 Sep	Volaris
08 Aug - 18 Aug	Aeromexico
11 Aug - 21 Aug	Volaris
20 Aug - 31 Aug	Aeromexico
20 Aug - 24 Aug	Aeromexico
09 Aug - 18 Aug	Volaris
09 Aug - 16 Aug	Viva
09 Aug - 17 Aug	Volaris
08 Aug - 17 Aug	Volaris
28 Aug - 04 Sep	Volaris
14 Aug - 04 Sep	Lufthansa

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

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 August from 598€

Return flights