Find cheap flights from St. Louis to San Juan starting at $94.
Book one-way or return flights from St. Louis to San Juan from as little as $94. 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 Airlines$94$18650% OFF50% OFF$186$94
- STL10:347h 37m1 stopSJU19:11Tue, May 21|St. Louis - San Juan|Spirit Airlines$103$18645% OFF45% OFF$186$103
- STL17:5613h 27m1 stopSJU08:23Wed, May 15|St. Louis - San Juan|Frontier Airlines$116$18638% OFF38% OFF$186$116
- STL21:1112h 27m1 stopSJU10:38Mon, May 6|St. Louis - San Juan|Frontier Airlines$118$118
- STL15:3618h 2m1 stopSJU10:38Sat, May 4|St. Louis - San Juan|Frontier Airlines$122$122
- STL21:2712h 11m1 stopSJU10:38Sat, May 11|St. Louis - San Juan|Frontier Airlines$122$122
- STL19:1612h 2m1 stopSJU08:18Thu, May 9|St. Louis - San Juan|Frontier Airlines$129$129
- STL21:5311h 45m1 stopSJU10:38Wed, May 1|St. Louis - San Juan|Frontier Airlines$130$130
- STL19:4420h 29m1 stopSJU17:13Fri, May 17|St. Louis - San Juan|Frontier Airlines$147$147
- STL05:0411h 1m1 stopSJU17:05Mon, May 6|St. Louis - San Juan|American Airlines$155$155
- 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 Airlines$94
- STL21:1115h 30m1 transferSJU13:41St. Louis Lambert International Airport - Luis Muñoz Marín International AirportMon, May 13Frontier Airlines$94Find More Flights
Frequently Asked Questions
How to find a cheap flight from St. Louis to San Juan
Cheapest nonstop flight price | $93 |
---|---|
Cheapest round-trip ticket price | $398 |
Off-season for travel | 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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