$58+ 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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SJU
Jan 11 — Jan 181
1 adult, Economy
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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
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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 12, 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 12, 2025.
This Priceline deal was found by Cheapflights users on 12/10. 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 12/153:30 pmSTL - SJU
1 stop9h 20mFrontier
Sun 12/213:55 amSJU - STL
1 stop7h 50mFrontier
Deal found 12/10![Frontier logo]()
$243
This Frontier deal was found by Cheapflights users on 12/10. 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 12/163:30 pmSTL - SJU
1 stop9h 20mFrontier
Thu 1/159:04 pmSJU - STL
1 stop12h 50mFrontier
Deal found 12/10![Frontier logo]()
$252
This Expedia deal was found by Cheapflights users on 12/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/143:30 pmSTL - SJU
1 stop9h 20mFrontier
Sun 12/213:55 amSJU - STL
1 stop7h 50mFrontier
Deal found 12/11![Frontier logo]()
$259
This Priceline deal was found by Cheapflights users on 12/10. 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.
Wed 12/173:30 pmSTL - SJU
1 stop15h 53mFrontier
Thu 12/189:37 pmSJU - STL
1 stop26h 56mFrontier
Deal found 12/10![Frontier logo]()
$264
This Frontier deal was found by Cheapflights users on 12/10. 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 12/214:09 pmSJU - STL
1 stop8h 24mFrontier
Deal found 12/10![Frontier logo]()
$268
This Frontier deal was found by Cheapflights users on 12/11. 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.
Sun 12/143:30 pmSTL - SJU
1 stop9h 20mFrontier
Sun 12/2110:33 pmSJU - STL
1 stop11h 39mFrontier
Deal found 12/11![Frontier logo]()
$284
This Frontier deal was found by Cheapflights users on 12/10. 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 12/163:30 pmSTL - SJU
1 stop9h 20mFrontier
Sun 12/214:09 pmSJU - STL
1 stop8h 24mFrontier
Deal found 12/10![Frontier logo]()
$289
This Frontier deal was found by Cheapflights users on 12/11. 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 12/11![Frontier logo]()
$299
This Frontier deal was found by Cheapflights users on 12/10. 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.
Wed 12/3111:17 amSTL - PUJ
Nonstop4h 16mFrontier
Wed 1/72:32 pmPUJ - STL
Nonstop5h 06mFrontier
Deal found 12/10![Frontier logo]()
$304
This Delta deal was found by Cheapflights users on 12/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:05 amSTL - NAS
1 stop5h 25mDelta
Thu 12/112:55 pmNAS - STL
1 stop7h 07mDelta
Deal found 12/9![Delta logo]()
$361
This Delta deal was found by Cheapflights users on 12/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/216:05 amSTL - PLS
1 stop8h 05mDelta
Wed 12/313:50 pmPLS - STL
1 stop8h 48mDelta
Deal found 12/11![Delta logo]()
$364
This American Airlines deal was found by Cheapflights users on 12/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/105:05 amSTL - NAS
2 stops11h 50mAmerican Airlines
Thu 12/116:45 pmNAS - STL
1 stop6h 14mAmerican Airlines
Deal found 12/9![American Airlines logo]()
$365
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 12, 2025.
Round-trip from | $116 (Priceline) |
|---|---|
One-way from | $58 (Frontier) |
Popular in | December |
Cheapest in | September |
Average price | $638 |
Good round-trip deal | $379 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 12, 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
Fri 3/6
6:00 am-3:59 pm
1 stop7h 59m
San Juan Luis Munoz Marin Intl
Mon 3/9
4:09 pm-10:33 pm
1 stop7h 24m
$215
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Fri 2/6
11:18 am-11:59 pm
1 stop10h 41m
San Juan Luis Munoz Marin Intl
Mon 2/9
4:36 pm-11:33 pm
1 stop8h 57m
$215
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Wed 1/21
9:54 am-8:50 pm
2 stops8h 56m
San Juan Luis Munoz Marin Intl
Tue 1/27
6:00 am-3:04 pm
2 stops11h 04m
$225
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Mon 1/26
9:57 am-10:22 pm
2 stops10h 25m
San Juan Luis Munoz Marin Intl
Wed 1/28
2:15 pm-10:58 pm
2 stops10h 43m
$225
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Wed 1/21
9:54 am-8:50 pm
2 stops8h 56m
San Juan Luis Munoz Marin Intl
Mon 1/26
7:12 pm-9:08 am
1 stop15h 56m
$225
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Sun 1/25
6:30 am-3:40 pm
1 stop7h 10m
San Juan Luis Munoz Marin Intl
Fri 1/30
2:05 am-2:28 pm
2 stops14h 23m
$225
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Tue 2/10
3:49 pm-12:43 am
1 stop6h 54m
San Juan Luis Munoz Marin Intl
Sat 2/21
5:25 pm-11:59 pm
1 stop8h 34m
$231
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Mon 1/19
12:47 pm-2:30 am
1 stop11h 43m
San Juan Luis Munoz Marin Intl
Sun 1/25
5:39 pm-9:21 am
1 stop17h 42m
$249
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Sun 12/14
9:54 am-9:55 am
1 stop22h 01m
San Juan Luis Munoz Marin Intl
Sun 12/21
10:08 am-9:45 am
1 stop25h 37m
$285
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Thu 2/5
6:02 pm-10:48 am
1 stop14h 46m
San Juan Luis Munoz Marin Intl
Tue 2/10
6:00 am-5:22 pm
1 stop13h 22m
$298
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 June is currently the most expensive (average of $249). 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 12, 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 12, 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.
Food
7.0
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
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
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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 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$140 | Average$409 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$170 | Average$334 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$205 | Average$604 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$219 | Average$747 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$225 | Average$523 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$245 | Average$616 | FlexibilityNo cancel fee | On-time71% |