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

Return flights

21 Aug - 30 Aug	Volaris
22 Aug - 31 Aug	Volaris
22 Aug - 30 Aug	Volaris
20 Aug - 27 Aug	Viva
21 Aug - 24 Aug	Volaris
10 Aug - 18 Aug	Aeromexico
17 Aug - 26 Aug	Aeromexico
05 Aug - 20 Aug	Aeromexico
21 Aug - 11 Sep	Volaris
31 Aug - 13 Sep	Viva
20 Aug - 24 Aug	Volaris
18 Aug - 24 Aug	Volaris
30 Aug - 16 Sep	Aeromexico
22 Aug - 05 Sep	Viva

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 $782

Return flights