Cheapest one-way flights from San Juan to Madrid in September from $272

AirHint found the following cheapest one-way flights from San Juan (SJU) to Madrid (MAD) in September 2025 (see full year).

One-Way flights

21 Sep Frontier Airlines
28 Sep Frontier Airlines
23 Sep Frontier Airlines
19 Sep Frontier Airlines
22 Sep Frontier Airlines
18 Sep Frontier Airlines
10 Sep Frontier Airlines
04 Sep Frontier Airlines
06 Sep Frontier Airlines
17 Sep Frontier Airlines

Also check the deals for return flights from San Juan to Madrid in September.

Skyscanner

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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