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Caribbean Islands

$100+ Cheap flights from St. Louis (STL) to Caribbean Islands

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 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SJU
Apr 9 — Apr 161
Wed 4/9
Wed 4/16
1 adult, Economy
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Cheap flight deals from St. Louis to Caribbean Islands

Keep the following information in mind while searching for St. Louis to Caribbean Islands flight deals. Data was last updated April 4, 2025.

Round-trip from

$205
(Southwest)

One-way from

$100
(Southwest)

Popular in

July

Cheapest in

April

Average price

$324
From Lambert-St Louis to Caribbean Islands
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One-way flight from Lambert-St Louis to Caribbean Islands
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($34 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from St. Louis to Caribbean Islands

Cheapest flights from St. Louis to Caribbean Islands
Explore the most affordable flight options available from St. Louis to Caribbean Islands. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 4, 2025.

This Southwest deal was found by Cheapflights users on 4/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/31:25 pmSTL - SJU
Nonstop4h 25mSouthwest
Sat 5/103:20 pmSJU - STL
1 stop7h 40mSouthwest
Deal found 4/3$205
This United Airlines deal was found by Cheapflights users on 4/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/268:00 amSTL - SJU
2 stops11h 38mUnited Airlines
Wed 4/307:45 amSJU - STL
1 stop9h 02mUnited Airlines
Deal found 4/3$219
This American Airlines deal was found by Cheapflights users on 4/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/35:27 pmSTL - SJU
1 stop10h 33mAmerican Airlines
Wed 5/73:50 pmSJU - STL
2 stops9h 01mAmerican Airlines
Deal found 4/3$286
This CheapOair deal was found by Cheapflights users on 4/3. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/35:45 pmSTL - SJU
1 stop18h 44mFrontier
Fri 5/93:56 amSJU - STL
1 stop21h 10mFrontier
Deal found 4/3$298
This Delta deal was found by Cheapflights users on 4/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/103:43 pmSTL - SJU
1 stop6h 08mDelta
Thu 6/197:30 amSJU - STL
1 stop8h 08mDelta
Deal found 4/3$313
This Mytrip deal was found by Cheapflights users on 4/4. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1710:10 amSTL - SJU
1 stop7h 57mMultiple Airlines
Sat 5/173:56 amSJU - STL
1 stop21h 10mMultiple Airlines
Deal found 4/4$315
This Mytrip deal was found by Cheapflights users on 4/3. 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.
Sun 5/46:10 pmSTL - SJU
2 stops28h 29mSpirit Airlines
Sat 5/108:12 pmSJU - STL
1 stop14h 03mSpirit Airlines
Deal found 4/3$328
This Mytrip deal was found by Cheapflights users on 4/3. 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.
Sat 5/2410:10 amSTL - STT
1 stop22h 47mSpirit Airlines
Fri 5/3010:52 amSTT - STL
1 stop23h 23mSpirit Airlines
Deal found 4/3$333
This Delta deal was found by Cheapflights users on 4/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/206:00 amSTL - NAS
1 stop4h 47mDelta
Wed 4/305:25 pmNAS - STL
1 stop7h 11mDelta
Deal found 4/4$347
This American Airlines deal was found by Cheapflights users on 4/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/67:32 amSTL - NAS
2 stops9h 18mAmerican Airlines
Thu 5/157:45 amNAS - STL
1 stop15h 34mAmerican Airlines
Deal found 4/3$351
This Kiwi.com deal was found by Cheapflights users on 4/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1710:10 amSTL - PUJ
1 stop27h 07mMultiple Airlines
Tue 5/2012:42 pmPUJ - STL
1 stop12h 02mMultiple Airlines
Deal found 4/3$363
This United Airlines deal was found by Cheapflights users on 4/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/216:00 amSTL - NAS
1 stop8h 58mUnited Airlines
Thu 5/295:00 pmNAS - STL
1 stop6h 15mUnited Airlines
Deal found 4/3$384

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Caribbean Islands 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 April 4, 2025.
Use the filters below to find and compare flights from St. Louis to Caribbean Islands that are best for you.

Fly from

St. Louis

Fly to

Caribbean Islands

Route

Depart

Return

Price

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sat 5/3

1:25 pm-6:50 pm

Nonstop4h 25m

San Juan Luis Munoz Marin Intl

Sat 5/10

3:20 pm-10:00 pm

1 stop7h 40m

$205

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sat 4/26

8:00 am-8:38 pm

2 stops11h 38m

San Juan Luis Munoz Marin Intl

Wed 4/30

7:45 am-3:47 pm

1 stop9h 02m

$219

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sat 5/3

5:27 pm-5:00 am

1 stop10h 33m

San Juan Luis Munoz Marin Intl

Wed 5/7

3:50 pm-11:51 pm

2 stops9h 01m

$286

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sat 5/3

5:45 pm-1:29 pm

1 stop18h 44m

San Juan Luis Munoz Marin Intl

Fri 5/9

3:56 am-12:06 am

1 stop21h 10m

$298

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Tue 6/10

3:43 pm-10:51 pm

1 stop6h 08m

San Juan Luis Munoz Marin Intl

Thu 6/19

7:30 am-2:38 pm

1 stop8h 08m

$313

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sat 5/17

10:10 am-7:07 pm

1 stop7h 57m

San Juan Luis Munoz Marin Intl

Sat 5/17

3:56 am-12:06 am

1 stop21h 10m

$315

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sun 5/4

6:10 pm-11:39 pm

2 stops28h 29m

San Juan Luis Munoz Marin Intl

Sat 5/10

8:12 pm-9:15 am

1 stop14h 03m

$328

St. LouisSaint Thomas Island

STL - STT

STLSTT

Lambert-St Louis

Sat 5/24

10:10 am-9:57 am

1 stop22h 47m

Saint Thomas Island Cyril E King

Fri 5/30

10:52 am-9:15 am

1 stop23h 23m

$333

St. LouisNassau

STL - NAS

STLNAS

Lambert-St Louis

Sun 4/20

6:00 am-11:47 am

1 stop4h 47m

Nassau Intl

Wed 4/30

5:25 pm-11:36 pm

1 stop7h 11m

$347

St. LouisNassau

STL - NAS

STLNAS

Lambert-St Louis

Tue 5/6

7:32 am-5:50 pm

2 stops9h 18m

Nassau Intl

Thu 5/15

7:45 am-10:19 pm

1 stop15h 34m

$351

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

Showing 1-10 of 57 results
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Best time to book a flight from St. Louis to Caribbean Islands

Have a flexible travel schedule? Discover the best time to fly to Caribbean Islands 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 Islands

What is the cheapest month to book a flight from St. Louis to Caribbean Islands?

Currently, September is the cheapest month in which you can book a flight from St. Louis to Caribbean Islands (average of $254). Flying from St. Louis to Caribbean Islands in December is currently the most expensive (average of $336). 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 EPX?

Find hourly flight availability from St. Louis to Caribbean Islands. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 4, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Caribbean Islands as you normally would.

Rainfall in Caribbean Islands by month

Plan your trip to Caribbean Islands by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Caribbean Islands ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit Caribbean Islands when rainfall is around 2.2 in.

Temperature in Caribbean Islands by month

Plan your trip to Caribbean Islands by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Caribbean Islands, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

Reviews of airlines servicing Caribbean Islands

Get insights into the airlines that provide service to Caribbean Islands. 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 Islands. Reviews last updated April 4, 2025.
Read reviews from past customers who have flown Southwest, Delta and Copa Airlines from St. Louis to Caribbean Islands. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,276 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,276 reviews
Southwest
8.0
Very good
4,276 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,900 reviews
Southwest
8.0
Very good
4,276 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Copa Airlines
7.6
Good
1,404 reviews
Southwest
8.0
Very good
4,276 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,618 reviews
Southwest
8.0
Very good
4,276 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,276 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Caribbean Islands. 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 Islands?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to Caribbean Islands from St. Louis.

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

    $100 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $105 and $115, respectively.

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

    The most popular route from St. Louis to Caribbean Islands is Lambert-St Louis - San Juan Luis Munoz Marin Intl. You may also consider Lambert-St Louis - Punta Cana or Lambert-St Louis - Montego Bay Sangster Intl.

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

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

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

    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 Islands.

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

    Yes. Cheapflights offers flight deals from St. Louis to Caribbean Islands 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 Islands?

    Currently, September is the cheapest month in which you can book a flight from St. Louis to Caribbean Islands (average of $254). Flying from St. Louis to Caribbean Islands in December is currently the most expensive (average of $336). 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 Islands

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 Islands

Discover the top 6 airlines that operate flights from St. Louis to Caribbean Islands. 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 April 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$140Average$419FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$166Average$312FlexibilityNo cancel feeOn-time65%
DeltaCheapest$254Average$603FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$264Average$550FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$268Average$621FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$392Average$759FlexibilityNo cancel feeOn-time63%

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