Cheap flights from St. Louis, MO to San Juan, United States
Flights starting at $77. Choose between Frontier Airlines, Spirit Airlines, or United Airlines to find the best price.
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Tips to know when travelling to San Juan
Cheapest one-way trip | $123 |
---|---|
Cheapest round-trip | $252 |
Average round-trip | $254 |
Includes rare itinerary | |
Most popular airline | Frontier Airlines |
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Book your trip to arrive at Luis Muñoz Marín International, or Fernando Luis Ribas Dominicci. The most popular airlines for this route are Frontier Airlines, Spirit Airlines, United Airlines, Southern Airways Express, and JetBlue Airways. St. Louis and San Juan have 137 direct flights per week.
Check-in for a flight from St. Louis to San Juan
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
Frontier Airlines | FFT | F9 | No | Opens 24 days before flight Closes 1 hours before flight |
Spirit Airlines | NKS | NK | No | Opens 24 days before flight Closes 1 hours before flight |
United Airlines | UAL | UA | Yes | No |
Southern Airways Express | FDY | 9X | Yes | No |
JetBlue Airways | JBU | B6 | No | Opens 24 days before flight Closes 2 hours before flight |
Weather in San Juan
Average Weather
Month | Average monthly max temperature | Average monthly min temperature |
January | 27°C | 22°C |
February | 27°C | 22°C |
March | 27°C | 22°C |
April | 28°C | 23°C |
May | 29°C | 24°C |
June | 30°C | 25°C |
July | 30°C | 25°C |
August | 30°C | 25°C |
September | 30°C | 25°C |
October | 29°C | 25°C |
November | 28°C | 24°C |
December | 27°C | 23°C |
14 day forecast
Frequently asked questions
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