Cheapest return SFO–SJU flights, May

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

Return flights

23 May - 27 May Frontier Airlines
28 May - 02 Jun Frontier Airlines
15 May - 22 May Frontier Airlines
26 May - 01 Jun Frontier Airlines
24 May - 28 May Frontier Airlines
30 May - 06 Jun Frontier Airlines
16 May - 22 May Frontier Airlines
20 May - 03 Jun Frontier Airlines
31 May - 06 Jun Frontier Airlines
28 May - 01 Jun Frontier Airlines
26 May - 30 May Frontier Airlines
16 May - 20 May Frontier Airlines
17 May - 21 May Frontier Airlines
09 May - 14 May Frontier Airlines
07 May - 12 May Frontier Airlines
14 May - 19 May Frontier Airlines
01 May - 30 Jun Frontier Airlines

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

Powered by

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

Feel free to contact us with any feedback or request another flight research.