Cheapest return flights from Buffalo to San Juan in May from 234€

AirHint found the following cheapest return flights from Buffalo (BUF) to San Juan (SJU) in May 2026 (see full year).

Return flights

04 May - 18 May Southwest Airlines
13 May - 18 May Delta
07 May - 11 May Frontier Airlines
14 May - 18 May Delta
08 May - 11 May Frontier Airlines
28 May - 31 May United
15 May - 25 May Southwest Airlines
21 May - 25 May Southwest Airlines

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

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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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