Cheapest return flights from Grand Rapids to San Juan in September from $191

AirHint found the following cheapest return flights from Grand Rapids (GRR) to San Juan (SJU) in September 2025 (see full year).

Return flights

16 Sep - 20 Sep American Airlines
04 Sep - 07 Sep Frontier Airlines

Also check the deals for one-way flights from Grand Rapids to San Juan 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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