$87+ 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 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SJU
Feb 25 — Mar 41
1 adult, Economy
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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 January 26, 2026.
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 January 26, 2026.
This Frontier deal was found by Cheapflights users on 1/25. 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.
Sat 2/213:49 pm
STL
- SJU
1 stop9h 04m
Frontier
Tue 3/311:07 am
SJU
- STL
1 stop13h 20m
Frontier
Deal found 1/25![Frontier logo]()
$178
This Frontier deal was found by Cheapflights users on 1/25. 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 2/233:49 pm
STL
- SJU
1 stop6h 54m
Frontier
Wed 3/45:25 pm
SJU
- STL
1 stop7h 02m
Frontier
Deal found 1/25![Frontier logo]()
$182
This Frontier deal was found by Cheapflights users on 1/25. 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.
Sat 2/213:49 pm
STL
- SJU
1 stop9h 04m
Frontier
Thu 3/55:25 pm
SJU
- STL
1 stop8h 34m
Frontier
Deal found 1/25![Frontier logo]()
$197
This Priceline deal was found by Cheapflights users on 1/26. 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 3/43:49 pm
STL
- SJU
1 stop6h 54m
Frontier
Tue 3/1011:07 am
SJU
- STL
1 stop13h 12m
Frontier
Deal found 1/26![Frontier logo]()
$201
This Frontier deal was found by Cheapflights users on 1/25. 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 2/173:49 pm
STL
- SJU
1 stop8h 59m
Frontier
Tue 2/245:25 pm
SJU
- STL
1 stop7h 02m
Frontier
Deal found 1/25![Frontier logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/210:16 am
STL
- SJU
1 stop11h 43m
Frontier
Sat 2/74:36 pm
SJU
- STL
1 stop8h 57m
Frontier
Deal found 1/26![Frontier logo]()
$204
This Priceline deal was found by Cheapflights users on 1/26. 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.
Sun 3/13:49 pm
STL
- SJU
1 stop9h 04m
Frontier
Wed 3/45:25 pm
SJU
- STL
1 stop7h 02m
Frontier
Deal found 1/26![Frontier logo]()
$213
This CheapOair deal was found by Cheapflights users on 1/26. 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 3/33:49 pm
STL
- SJU
1 stop9h 04m
Frontier
Sun 3/83:08 am
SJU
- STL
1 stop21h 11m
Frontier
Deal found 1/26![Frontier logo]()
$216
This Frontier deal was found by Cheapflights users on 1/25. 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 2/223:49 pm
STL
- SJU
1 stop9h 04m
Frontier
Sat 2/285:25 pm
SJU
- STL
1 stop8h 34m
Frontier
Deal found 1/25![Frontier logo]()
$217
This Frontier deal was found by Cheapflights users on 1/26. 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 3/53:49 pm
STL
- SJU
1 stop9h 04m
Frontier
Tue 3/1011:07 am
SJU
- STL
1 stop13h 12m
Frontier
Deal found 1/26![Frontier logo]()
$220
This Kiwi.com deal was found by Cheapflights users on 1/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/219:41 am
STL
- SJU
1 stop11h 28m
Multiple Airlines
Sat 2/284:17 pm
SJU
- STL
2 stops40h 34m
Multiple Airlines
Deal found 1/25![Multiple Airlines logo]()
$221
This Trip.com deal was found by Cheapflights users on 1/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/243:49 pm
STL
- STT
1 stop20h 42m
Multiple Airlines
Tue 3/33:36 pm
STT
- STL
1 stop8h 51m
Multiple Airlines
Deal found 1/25![Multiple Airlines logo]()
$222
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 January 26, 2026.
Round-trip from | $178 (Frontier) |
|---|---|
One-way from | $87 (Frontier) |
Popular in | December |
Cheapest in | September |
Average price | $435 |
Good round-trip deal | $466 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 January 26, 2026.
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
Sat 5/2
4:55 pm-2:01 am
1 stop8h 06m
San Juan Luis Munoz Marin Intl
Sat 5/9
11:07 am-11:19 pm
1 stop13h 12m
$182
St. LouisSaint Thomas Island
STL - STT
STLSTT
Lambert-St Louis
Tue 2/24
3:49 pm-2:31 pm
1 stop20h 42m
Saint Thomas Island Cyril E King
Tue 3/3
3:36 pm-10:27 pm
1 stop8h 51m
$222
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Thu 2/5
5:42 pm-10:24 am
1 stop14h 42m
San Juan Luis Munoz Marin Intl
Mon 2/9
3:53 am-10:27 pm
1 stop20h 34m
$222
St. LouisSaint Thomas Island
STL - STT
STLSTT
Lambert-St Louis
Fri 2/27
3:49 pm-2:31 pm
1 stop20h 42m
Saint Thomas Island Cyril E King
Tue 3/3
3:36 pm-10:27 pm
1 stop8h 51m
$231
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Tue 5/12
9:00 am-4:15 pm
1 stop6h 15m
San Juan Luis Munoz Marin Intl
Wed 5/20
7:30 am-12:54 pm
1 stop6h 24m
$246
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Tue 5/5
6:00 am-4:23 pm
1 stop9h 23m
San Juan Luis Munoz Marin Intl
Thu 5/7
6:15 am-12:54 pm
1 stop7h 39m
$246
St. LouisSaint Thomas Island
STL - STT
STLSTT
Lambert-St Louis
Mon 2/23
3:49 pm-2:31 pm
1 stop20h 42m
Saint Thomas Island Cyril E King
Sat 2/28
5:40 pm-6:51 am
2 stops39h 11m
$311
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Wed 4/8
4:54 pm-2:01 am
1 stop8h 07m
San Juan Luis Munoz Marin Intl
Sat 4/11
7:00 am-10:30 am
2 stops28h 30m
$316
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Sat 3/7
12:40 pm-12:55 am
1 stop10h 15m
San Juan Luis Munoz Marin Intl
Tue 3/10
5:55 am-1:50 pm
2 stops8h 55m
$326
St. LouisSaint Thomas Island
STL - STT
STLSTT
Lambert-St Louis
Sat 4/11
8:36 am-1:26 pm
1 stop27h 50m
Saint Thomas Island Cyril E King
Wed 4/22
4:40 pm-10:30 am
2 stops18h 50m
$329
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 $143). Flying from St. Louis to Caribbean in June is currently the most expensive (average of $253). 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 January 26, 2026.
When flying from St. Louis to Caribbean, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
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 January 26, 2026.
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.
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
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 January 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$133 | Average$395 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$146 | Average$329 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$180 | Average$589 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$219 | Average$754 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$225 | Average$509 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$234 | Average$619 | FlexibilityNo cancel fee | On-time71% |