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

Return flights

22 Aug - 03 Sep	Arajet
23 Aug - 03 Sep	Arajet
22 Aug - 25 Aug	Arajet
23 Aug - 25 Aug	Arajet
18 Aug - 21 Aug	Copa
19 Aug - 26 Aug	Copa
23 Aug - 26 Aug	Copa
26 Aug - 02 Sep	Copa
20 Aug - 26 Aug	Copa
17 Aug - 21 Aug	Copa
20 Aug - 23 Aug	Copa
22 Aug - 29 Aug	Arajet
22 Aug - 26 Aug	Copa
28 Aug - 02 Sep	Avianca
28 Aug - 01 Sep	Avianca
16 Aug - 05 Sep	Volaris
29 Aug - 07 Sep	Arajet
16 Aug - 10 Sep	Volaris
16 Aug - 09 Sep	Volaris
31 Aug - 07 Sep	Volaris

Also check the deals for one-way flights from Mexico City to San Juan 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 San Juan in August from 263€

Return flights