AirHint found the following cheapest return flights from San Francisco (SFO) to San Juan (SJU) in November 2025 (see full year).

Return flights

03 Nov - 07 Nov	Frontier Airlines
02 Nov - 06 Nov	Frontier Airlines
13 Nov - 18 Nov	Frontier Airlines
14 Nov - 19 Nov	Frontier Airlines
07 Nov - 11 Nov	Frontier Airlines
06 Nov - 09 Nov	Frontier Airlines
13 Nov - 16 Nov	Frontier Airlines
20 Nov - 24 Nov	United
26 Nov - 28 Nov	American Airlines
25 Nov - 01 Dec	Frontier Airlines
22 Nov - 29 Nov	Frontier Airlines
23 Nov - 07 Dec	Delta
24 Nov - 07 Dec	Delta

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

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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Cheapest return flights from San Francisco to San Juan in November from 297€

Return flights