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

Return flights

25 Feb - 03 Mar	Frontier Airlines
06 Feb - 27 Feb	United
25 Feb - 02 Mar	Frontier Airlines
19 Feb - 24 Feb	United
18 Feb - 23 Feb	United
19 Feb - 23 Feb	Frontier Airlines
06 Feb - 08 Feb	Southwest Airlines
14 Feb - 21 Feb	Frontier Airlines
20 Feb - 22 Mar	Frontier Airlines
13 Feb - 18 Feb	Frontier Airlines
20 Feb - 08 Mar	Southwest Airlines
13 Feb - 01 Mar	Frontier Airlines
13 Feb - 15 Feb	Southwest Airlines

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

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 February from 387€

Return flights