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$113+ 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 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SJU
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Find flight deals from St. Louis to Caribbean

Cheapest flights from St. Louis to Caribbean
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 October 28, 2025.

This American Airlines deal was found by Cheapflights users on 10/28. 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.
Tue 11/186:00 amSTL - SJU
2 stops12h 48mAmerican Airlines
Wed 11/196:25 amSJU - STL
1 stop16h 35mAmerican Airlines
Deal found 10/28$220
This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1810:00 amSTL - SJU
2 stops10h 22mUnited Airlines
Thu 11/208:10 amSJU - STL
1 stop9h 36mUnited Airlines
Deal found 10/27$225
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1811:20 amSTL - SJU
1 stop8h 06mUnited Airlines
Tue 11/182:05 amSJU - STL
1 stop10h 35mUnited Airlines
Deal found 10/28$243
This Frontier deal was found by Cheapflights users on 10/27. 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 11/167:45 pmSTL - SJU
2 stops18h 25mFrontier
Thu 11/206:01 amSJU - STL
2 stops19h 56mFrontier
Deal found 10/27$270
This American Airlines deal was found by Cheapflights users on 10/27. 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.
Tue 12/95:15 amSTL - SJU
2 stops9h 48mAmerican Airlines
Fri 12/128:20 amSJU - STL
1 stop10h 48mAmerican Airlines
Deal found 10/27$298
This Frontier deal was found by Cheapflights users on 10/27. 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 11/154:33 pmSTL - SJU
1 stop8h 21mFrontier
Sun 11/239:30 pmSJU - STL
2 stops22h 49mFrontier
Deal found 10/27$300
This CheapOair deal was found by Cheapflights users on 10/27. 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.
Mon 11/1710:25 amSTL - SJU
1 stop14h 29mFrontier
Mon 11/246:52 pmSJU - STL
1 stop14h 30mFrontier
Deal found 10/27$301
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:05 amSTL - SJU
2 stops10h 04mUnited Airlines
Wed 12/317:00 amSJU - STL
2 stops12h 54mUnited Airlines
Deal found 10/28$315
This Frontier deal was found by Cheapflights users on 10/25. 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.
Wed 12/1011:24 amSTL - PUJ
Nonstop4h 16mFrontier
Wed 12/172:57 pmPUJ - STL
Nonstop5h 06mFrontier
Deal found 10/25$335
This Air Canada deal was found by Cheapflights users on 10/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/24:05 pmSTL - CUR
1 stop22h 15mAir Canada
Sat 11/85:20 pmCUR - STL
1 stop24h 09mAir Canada
Deal found 10/27$336
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Sun 11/96:21 pmSTL - PUJ
1 stop18h 59mMultiple Airlines
Thu 11/206:43 pmPUJ - STL
2 stops40h 14mMultiple Airlines
Deal found 10/26$362
This American Airlines deal was found by Cheapflights users on 10/28. 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.
Thu 11/206:00 amSTL - MBJ
1 stop7h 53mAmerican Airlines
Wed 11/264:28 pmMBJ - STL
1 stop7h 06mAmerican Airlines
Deal found 10/28$383

Cheap 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 October 28, 2025.

Round-trip from

$220
(United Airlines)

One-way from

$113
(United Airlines)

Popular in

December

Cheapest in

September

Average price

$485

Good round-trip deal

$495 or less

Good one-way deal

$311 or less
From Lambert-St Louis to Caribbean
Search Deals
One-way flight from Lambert-St Louis to Caribbean
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Lambert-St Louis to Caribbean.
Search Deals
Price to beat on a one-way flight from Lambert-St Louis to Caribbean.
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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 October 28, 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

Tue 11/18

10:00 am-10:22 pm

2 stops10h 22m

San Juan Luis Munoz Marin Intl

Thu 11/20

8:10 am-3:46 pm

1 stop9h 36m

$225

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Tue 11/18

10:00 am-10:22 pm

2 stops10h 22m

San Juan Luis Munoz Marin Intl

Tue 11/18

2:05 am-10:40 am

1 stop10h 35m

$243

St. LouisSaint Thomas Island

STL - STT

STLSTT

Lambert-St Louis

Wed 1/21

5:11 pm-3:11 pm

1 stop20h 00m

Saint Thomas Island Cyril E King

Thu 1/29

4:06 pm-10:33 pm

1 stop8h 27m

$302

St. LouisSaint Thomas Island

STL - STT

STLSTT

Lambert-St Louis

Sat 1/24

5:11 pm-12:28 pm

2 stops17h 17m

Saint Thomas Island Cyril E King

Thu 1/29

4:06 pm-7:50 am

1 stop17h 44m

$304

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Thu 12/25

8:05 am-8:09 pm

2 stops10h 04m

San Juan Luis Munoz Marin Intl

Tue 12/30

2:05 am-12:27 pm

2 stops12h 22m

$315

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Fri 1/16

11:12 am-3:02 pm

1 stop25h 50m

San Juan Luis Munoz Marin Intl

Thu 1/22

3:55 am-10:33 pm

1 stop20h 38m

$335

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sun 11/16

11:05 am-9:00 pm

1 stop7h 55m

San Juan Luis Munoz Marin Intl

Wed 11/19

2:05 am-2:24 pm

2 stops14h 19m

$355

St. LouisPunta Cana

STL - PUJ

STLPUJ

Lambert-St Louis

Sun 11/9

6:21 pm-3:20 pm

1 stop18h 59m

Punta Cana

Thu 11/20

6:43 pm-8:57 am

2 stops40h 14m

$362

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Tue 12/30

11:51 am-10:05 pm

1 stop8h 14m

San Juan Luis Munoz Marin Intl

Mon 1/5

4:10 am-10:56 am

1 stop8h 46m

$364

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Fri 11/28

5:45 pm-10:25 am

2 stops14h 40m

San Juan Luis Munoz Marin Intl

Tue 12/9

9:40 am-7:30 pm

1 stop11h 50m

$365

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

Showing 1-10 of 60 results
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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 $261). 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 October 28, 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 15% 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 October 28, 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.
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Boarding

8.1

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,240 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Boarding

8.1

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
7.9
Good
7,994 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Boarding

8.1

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
9,001 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Boarding

8.1

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,032 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Boarding

8.1

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,124 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Boarding

8.1

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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.

  • What airport do you fly from for flights from St. Louis to Caribbean?

    If you book a flight to Caribbean from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis.

  • How long is the flight from St. Louis to Caribbean?

    Airlines like United Airlines, Frontier, and Delta fly from St. Louis to Caribbean in about 7h 33m. The time it takes to get you to your destination can typically vary by up to 18h 17m. St. Louis and Caribbean are separated by a distance of 1585 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from St. Louis to Caribbean one-way?

    One-way options have recently been found by users for as low as $113 on Delta. Other airlines that offer cheap prices include American Airlines from $149 and United Airlines from $149 one-way.

  • What are the most popular routes from St. Louis to Caribbean?

    While some choose either Lambert-St Louis - Punta Cana or Lambert-St Louis - Montego Bay Sangster Intl, Lambert-St Louis - San Juan Luis Munoz Marin Intl is the most popular route from St. Louis to Caribbean.

  • Can I find deals for flights from St. Louis to Caribbean that include hotel bookings?

    Yes. In addition to deals on St. Louis to Caribbean flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Caribbean?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Caribbean.

  • Can I find deals for business class flights from St. Louis to Caribbean?

    Yes. Cheapflights offers flight deals from St. Louis to Caribbean by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • 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 $261). 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.

See more FAQs

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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.
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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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$140Average$395FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$170Average$329FlexibilityNo cancel feeOn-time65%
DeltaCheapest$206Average$589FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$219Average$730FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$225Average$521FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$259Average$636FlexibilityNo cancel feeOn-time71%

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