AirHint found the following cheapest return flights from Greenville (GSP) to San Juan (SJU) in December 2025 (see full year).
Return flights
| 12 Dec - 19 Dec | Allegiant Air | ||
| 05 Dec - 07 Dec | Allegiant Air | ||
| 01 Dec - 03 Dec | Allegiant Air | ||
| 12 Dec - 03 Jan | Allegiant Air |
Also check the deals for one-way flights from Greenville to San Juan in December.
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.
Find us on social media