Find St. Louis to San Juan flights starting at CAD 129.
Book one-way or return flights from St. Louis to San Juan from as little as CAD 129. Choose from the popular airlines below and book your flight today!
- One way
- Round-trip
- STL21:1115h 30m1 stopSJU13:41Mon, May 13|St. Louis - San Juan|Frontier AirlinesCAD 129CAD 25449% OFF49% OFFCAD 254CAD 129
- STL10:347h 37m1 stopSJU19:11Tue, May 21|St. Louis - San Juan|Spirit AirlinesCAD 141CAD 25444% OFF44% OFFCAD 254CAD 141
- STL17:5613h 27m1 stopSJU08:23Wed, May 15|St. Louis - San Juan|Frontier AirlinesCAD 160CAD 25437% OFF37% OFFCAD 254CAD 160
- STL21:1112h 27m1 stopSJU10:38Mon, May 6|St. Louis - San Juan|Frontier AirlinesCAD 163CAD 163
- STL21:2712h 11m1 stopSJU10:38Sat, May 11|St. Louis - San Juan|Frontier AirlinesCAD 168CAD 168
- STL19:1612h 2m1 stopSJU08:18Thu, May 9|St. Louis - San Juan|Frontier AirlinesCAD 177CAD 177
- STL21:5311h 45m1 stopSJU10:38Wed, May 1|St. Louis - San Juan|Frontier AirlinesCAD 179CAD 179
- STL15:369h 14m1 stopSJU01:50Sat, May 4|St. Louis - San Juan|Frontier AirlinesCAD 179CAD 179
- STL19:4420h 29m1 stopSJU17:13Fri, May 17|St. Louis - San Juan|Frontier AirlinesCAD 203CAD 203
- STL05:0411h 1m1 stopSJU17:05Mon, May 6|St. Louis - San Juan|American AirlinesCAD 213CAD 213
- STL13:003h 5mDirectSJU14:00Wed, May 8|St. Louis - San Juan|Frontier AirlinesFind More FlightsFind More Flights
Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.
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Find more flights and airlines
Discover different routes, airlines, and transfers and find the best alternative flights for your journey from St. Louis to San Juan.
- CheapestSTL21:1115h 30m1 transferSJU13:41St. Louis Lambert International Airport - Luis Muñoz Marín International AirportMon, May 13Frontier AirlinesCAD 129
- STL21:1115h 30m1 transferSJU13:41St. Louis Lambert International Airport - Luis Muñoz Marín International AirportMon, May 13Frontier AirlinesCAD 129Find More Flights
How do I find the cheapest flights?
How to find a cheap flight from St. Louis to San Juan
Cheapest direct flight price | CAD 129 |
---|---|
Cheapest return ticket price | CAD 548 |
Cheapest month | May |
Peak season for travel | July |
Flight distance | 3,237.41km |
Average flight time | 4 hours 30 minutes |
Popular airline | American Airlines |
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