Cheapest return flights from Porto to San Juan in May from $895

Best time to book flights for Porto (OPO) to San Juan (SJU) flights at AirHint

AirHint found the following cheapest return flights from Porto (OPO) to San Juan (SJU) in May 2025 (see full year).

Return flights

21 May - 28 May United

Also check the deals for one-way flights from Porto to San Juan in May.

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.

Book a cheap hotel in San Juan

Cheap car rent in San Juan