Cheapest one-way flights from St. Louis to San Juan in June from $151
AirHint found the following cheapest one-way flights from St. Louis (STL) to San Juan (SJU) in June 2025 (see full year).
One-Way flights
| 19 Jun | Spirit Airlines | ||
| 15 Jun | Spirit Airlines | ||
| 20 Jun | Spirit Airlines | ||
| 13 Jun | Spirit Airlines | ||
| 21 Jun | United | ||
| 14 Jun | Frontier Airlines | ||
| 14 Jun | Southwest Airlines | direct | |
| 21 Jun | Southwest Airlines | direct |
Also check the deals for return flights from St. Louis to San Juan in June.
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.
