Cheapest return flights from Portland to San Juan in March from $1029

AirHint found the following cheapest return flights from Portland (PDX) to San Juan (SJU) in March 2026 (see full year).

Return flights

22 Mar - 29 Mar Frontier Airlines
23 Mar - 29 Mar Frontier Airlines

Also check the deals for one-way flights from Portland to San Juan in March.

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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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