$90+ Cheap flights from St. Louis (STL) to Caribbean
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SJU
Jan 3 — Jan 101
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from St. Louis to Caribbean with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Caribbean
Cheapest flights from St. Louis to CaribbeanExplore the most affordable flight options available from St. Louis to Caribbean. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.
Explore the most affordable flight options available from St. Louis to Caribbean. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.
This Frontier deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1810:42 amSTL - SJU
1 stop11h 55mFrontier
Sun 12/213:55 amSJU - STL
1 stop7h 50mFrontier
Deal found 12/2![Frontier logo]()
$263
This CheapOair deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:48 amSTL - SJU
1 stop12h 46mFrontier
Wed 1/79:23 pmSJU - STL
1 stop27h 10mFrontier
Deal found 12/4![Frontier logo]()
$264
This Priceline deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/113:30 pmSTL - SJU
1 stop9h 20mFrontier
Thu 12/185:09 pmSJU - STL
1 stop7h 24mFrontier
Deal found 12/4![Frontier logo]()
$268
This Frontier deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/93:30 pmSTL - SJU
1 stop9h 20mFrontier
Fri 12/125:09 pmSJU - STL
1 stop7h 24mFrontier
Deal found 12/3![Frontier logo]()
$280
This Priceline deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1311:24 amSTL - PUJ
Nonstop4h 16mFrontier
Sat 12/202:57 pmPUJ - STL
Nonstop5h 06mFrontier
Deal found 12/4![Frontier logo]()
$284
This Frontier deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/153:30 pmSTL - SJU
1 stop9h 20mFrontier
Sun 12/2110:33 pmSJU - STL
1 stop11h 39mFrontier
Deal found 12/3![Frontier logo]()
$288
This Priceline deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/89:54 amSTL - SJU
1 stop14h 56mFrontier
Tue 12/93:55 amSJU - STL
1 stop20h 38mFrontier
Deal found 12/4![Frontier logo]()
$294
This Frontier deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/123:30 pmSTL - SJU
1 stop9h 20mFrontier
Sun 12/2110:33 pmSJU - STL
1 stop11h 39mFrontier
Deal found 12/3![Frontier logo]()
$304
This Mytrip deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1911:17 amSTL - PUJ
Nonstop4h 16mFrontier
Wed 12/242:57 pmPUJ - STL
Nonstop5h 06mFrontier
Deal found 12/3![Frontier logo]()
$306
This Priceline deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/123:30 pmSTL - SJU
1 stop9h 20mFrontier
Sat 12/133:55 amSJU - STL
1 stop7h 04mFrontier
Deal found 12/3![Frontier logo]()
$314
This CheapOair deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/63:30 pmSTL - SJU
1 stop9h 20mFrontier
Mon 12/299:37 pmSJU - STL
1 stop26h 56mFrontier
Deal found 12/4![Frontier logo]()
$315
This Priceline deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/53:30 pmSTL - SJU
1 stop9h 20mFrontier
Fri 12/125:09 pmSJU - STL
1 stop7h 24mFrontier
Deal found 12/4![Frontier logo]()
$317
Find flight deals from St. Louis to Caribbean
Keep the following information in mind while searching for St. Louis to Caribbean flight deals. Data was last updated December 4, 2025.
Round-trip from | $180 (Priceline) |
|---|---|
One-way from | $90 (Priceline) |
Popular in | December |
Cheapest in | September |
Average price | $615 |
Good round-trip deal | $401 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Caribbean that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 4, 2025.
Use the filters below to find and compare flights from St. Louis to Caribbean that are best for you.
Fly from
St. Louis
Fly to
Caribbean
Route
Depart
Return
Price
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Thu 2/19
5:11 pm-9:55 am
1 stop14h 44m
San Juan Luis Munoz Marin Intl
Sun 2/22
3:55 am-10:33 pm
1 stop20h 38m
$201
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Sun 1/18
10:06 am-11:29 pm
1 stop11h 23m
San Juan Luis Munoz Marin Intl
Sat 1/24
4:36 pm-11:33 pm
1 stop8h 57m
$237
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Sun 2/22
6:00 am-4:36 pm
1 stop8h 36m
San Juan Luis Munoz Marin Intl
Thu 2/26
2:05 am-12:25 pm
2 stops12h 20m
$284
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Fri 2/27
5:11 pm-2:50 am
1 stop7h 39m
San Juan Luis Munoz Marin Intl
Mon 3/2
11:05 am-10:33 pm
1 stop13h 28m
$286
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Wed 3/4
2:35 pm-11:10 pm
1 stop6h 35m
San Juan Luis Munoz Marin Intl
Sat 3/7
6:30 am-12:40 pm
1 stop8h 10m
$298
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Mon 1/26
11:20 am-12:36 am
2 stops11h 16m
San Juan Luis Munoz Marin Intl
Wed 1/28
2:05 am-10:41 am
1 stop10h 36m
$315
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Thu 2/26
2:05 pm-11:25 pm
1 stop7h 20m
San Juan Luis Munoz Marin Intl
Tue 3/10
5:15 am-3:30 pm
1 stop11h 15m
$315
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Tue 3/3
8:15 am-5:05 pm
1 stop6h 50m
San Juan Luis Munoz Marin Intl
Sun 3/8
9:50 pm-7:55 am
1 stop11h 05m
$315
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Mon 2/23
9:55 am-10:22 pm
2 stops10h 27m
San Juan Luis Munoz Marin Intl
Thu 2/26
2:05 am-12:25 pm
2 stops12h 20m
$317
St. LouisSaint Thomas Island
STL - STT
STLSTT
Lambert-St Louis
Wed 1/21
5:42 pm-2:52 pm
1 stop19h 10m
Saint Thomas Island Cyril E King
Mon 1/26
5:42 pm-11:33 pm
2 stops31h 51m
$327
Showing 1-10 of 60 results
Best time to book a flight from St. Louis to Caribbean
Have a flexible travel schedule? Discover the best time to fly to Caribbean from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Caribbean
What is the cheapest month to book a flight from St. Louis to Caribbean?
Currently, May is the cheapest month in which you can book a flight from St. Louis to Caribbean (average of $140). Flying from St. Louis to Caribbean in December is currently the most expensive (average of $260). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from STL to CB?
Find hourly flight availability from St. Louis to Caribbean. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 4, 2025.
A simple way to save on the total cost of your ticket is to fly from St. Louis to Caribbean in the evening. If you’re flexible enough to do this you can expect to save up to 19% on your trip compared to booking a flight in the morning.
What is the cheapest day to fly from St. Louis to Caribbean?
Use this chart to determine the cheapest time to fly round-trip from St. Louis to Caribbean. Price data was last updated on December 16, 2024.
Travelers seeking maximum savings on their St. Louis to Caribbean flight should consider departing on Tuesday evenings when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Caribbean
Get insights into the airlines that provide service to Caribbean. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Caribbean. Reviews last updated December 4, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from St. Louis to Caribbean to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Food
7.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Food
7.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Food
7.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Food
7.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Food
7.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Food
7.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Caribbean. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for St. Louis to Caribbean
See prices for flight routes from nearby airports that may be better suited for you.
Top 6 airlines flying from St. Louis to Caribbean
Discover the top 6 airlines that operate flights from St. Louis to Caribbean. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 4, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$140 | Average$406 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$170 | Average$334 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$208 | Average$598 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$219 | Average$752 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$225 | Average$524 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$246 | Average$614 | FlexibilityNo cancel fee | On-time71% |