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Cheap flights from St. Louis to Caribbean Islands from $113

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Caribbean Islands departing on 10/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Caribbean Islands

Cheap round-trip flights

United Airlines Logo
6:30 am - 8:38 pmSTL-SJU
13h 08m2 stops
United Airlines Logo
7:10 am - 3:46 pmSJU-STL
9h 36m1 stop
$225United Airlines
Find Deal
Wed, Oct 22 - Thu, Oct 30
United Airlines Logo
7:41 am - 10:22 pmSTL-SJU
12h 41m2 stops
United Airlines Logo
8:35 am - 3:21 pmSJU-STL
8h 46m1 stop
$260United Airlines
Find Deal
Wed, Feb 18 - Thu, Mar 5
Delta Logo
6:00 am - 2:15 pmSTL-SJU
6h 15m1 stop
Delta Logo
6:17 pm - 11:40 pmSJU-STL
7h 23m1 stop
$264Delta
Find Deal
Tue, Mar 3 - Wed, Mar 4
Frontier Logo
5:11 pm - 2:50 amSTL-SJU
7h 39m1 stop
Frontier Logo
9:32 pm - 10:46 pmSJU-STL
27h 14m1 stop
$268Frontier
Find Deal
Fri, Dec 12 - Mon, Dec 15
Frontier Logo
2:12 pm - 1:54 amSTL-SJU
10h 42m1 stop
Frontier Logo
3:59 am - 9:40 amSJU-STL
7h 41m1 stop
$272Frontier
Find Deal
Thu, Oct 30 - Sun, Nov 2
American Airlines Logo
11:18 am - 9:55 pmSTL-SJU
8h 37m1 stop
American Airlines Logo
4:15 pm - 9:44 pmSJU-STL
7h 29m1 stop
$285American Airlines
Find Deal
Tue, Mar 3 - Wed, Mar 4
American Airlines Logo
6:00 am - 11:05 pmSTL-SJU
16h 05m1 stop
American Airlines Logo
7:45 am - 11:05 pmSJU-STL
16h 20m1 stop
$298American Airlines
Find Deal
Sat, Oct 18 - Tue, Oct 21
Southwest Logo
7:35 am - 9:35 pmSTL-SJU
13h 00m1 stop
Southwest Logo
8:50 am - 12:00 pmSJU-STL
5h 10mnonstop
$312Southwest
Find Deal
Fri, Oct 31 - Sat, Nov 8
Southwest Logo
9:50 am - 12:45 amSTL-SJU
13h 55m1 stop
Southwest Logo
6:40 am - 12:45 pmSJU-STL
8h 05m1 stop
$316Southwest
Find Deal
Thu, Oct 30 - Mon, Nov 3
Delta Logo
6:00 am - 3:25 pmSTL-NAS
8h 25m1 stop
Delta Logo
1:16 pm - 6:02 pmNAS-STL
5h 46m1 stop
$357Delta
Find Deal
Sat, Oct 25 - Tue, Oct 28

United Airlines flights from St. Louis to Caribbean Islands

Our best United Airlines deals on St. Louis to Caribbean Islands flight tickets
United Airlines
Oct 22
STL6:30 amLambert-St Louis
13h 08m
2 stops
SJU8:38 pmSan Juan Luis Munoz Marin Intl
Oct 30
SJU7:10 amSan Juan Luis Munoz Marin Intl
9h 36m
1 stop
STL3:46 pmLambert-St Louis
$225
Find similar
United Airlines
Feb 18
STL7:41 amLambert-St Louis
12h 41m
2 stops
SJU10:22 pmSan Juan Luis Munoz Marin Intl
Mar 5
SJU8:35 amSan Juan Luis Munoz Marin Intl
8h 46m
1 stop
STL3:21 pmLambert-St Louis
$260
Find similar
United Airlines
Jan 20
STL9:57 amLambert-St Louis
10h 25m
2 stops
SJU10:22 pmSan Juan Luis Munoz Marin Intl
Jan 22
SJU2:05 amSan Juan Luis Munoz Marin Intl
10h 36m
1 stop
STL10:41 amLambert-St Louis
$267
Find similar

Frontier flights from St. Louis to Caribbean Islands

Our best Frontier deals on St. Louis to Caribbean Islands flight tickets
Frontier
Dec 12
STL5:11 pmLambert-St Louis
7h 39m
1 stop
SJU2:50 amSan Juan Luis Munoz Marin Intl
Dec 15
SJU9:32 pmSan Juan Luis Munoz Marin Intl
27h 14m
1 stop
STL10:46 pmLambert-St Louis
$268
Find similar
Frontier
Oct 30
STL2:12 pmLambert-St Louis
10h 42m
1 stop
SJU1:54 amSan Juan Luis Munoz Marin Intl
Nov 2
SJU3:59 amSan Juan Luis Munoz Marin Intl
7h 41m
1 stop
STL9:40 amLambert-St Louis
$272
Find similar
Frontier
Nov 8
STL4:33 pmLambert-St Louis
8h 21m
1 stop
SJU2:54 amSan Juan Luis Munoz Marin Intl
Nov 16
SJU10:39 pmSan Juan Luis Munoz Marin Intl
13h 01m
1 stop
STL9:40 amLambert-St Louis
$276
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated September 26, 2025.
Use the filters below to find and compare flights from St. Louis to Caribbean Islands that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Wed 10/22

6:30 am-8:38 pm

2 stops13h 08m

San Juan Luis Munoz Marin Intl

Thu 10/30

7:10 am-3:46 pm

1 stop9h 36m

$225

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Wed 2/18

7:41 am-10:22 pm

2 stops12h 41m

San Juan Luis Munoz Marin Intl

Thu 3/5

8:35 am-3:21 pm

1 stop8h 46m

$260

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Tue 3/3

6:00 am-2:15 pm

1 stop6h 15m

San Juan Luis Munoz Marin Intl

Wed 3/4

6:17 pm-11:40 pm

1 stop7h 23m

$264

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Fri 12/12

5:11 pm-2:50 am

1 stop7h 39m

San Juan Luis Munoz Marin Intl

Mon 12/15

9:32 pm-10:46 pm

1 stop27h 14m

$268

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Thu 10/30

2:12 pm-1:54 am

1 stop10h 42m

San Juan Luis Munoz Marin Intl

Sun 11/2

3:59 am-9:40 am

1 stop7h 41m

$272

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Tue 3/3

11:18 am-9:55 pm

1 stop8h 37m

San Juan Luis Munoz Marin Intl

Wed 3/4

4:15 pm-9:44 pm

1 stop7h 29m

$285

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sat 10/18

6:00 am-11:05 pm

1 stop16h 05m

San Juan Luis Munoz Marin Intl

Tue 10/21

7:45 am-11:05 pm

1 stop16h 20m

$298

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Fri 10/31

7:35 am-9:35 pm

1 stop13h 00m

San Juan Luis Munoz Marin Intl

Sat 11/8

8:50 am-12:00 pm

Nonstop5h 10m

$312

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Thu 10/30

9:50 am-12:45 am

1 stop13h 55m

San Juan Luis Munoz Marin Intl

Mon 11/3

6:40 am-12:45 pm

1 stop8h 05m

$316

St. LouisNassau

STL - NAS

STLNAS

Lambert-St Louis

Sat 10/25

6:00 am-3:25 pm

1 stop8h 25m

Nassau Intl

Tue 10/28

1:16 pm-6:02 pm

1 stop5h 46m

$357

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Caribbean Islands from

How to get the cheapest flight ticket from St. Louis to Caribbean Islands

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Caribbean Islands?

The month of September is, on average, the cheapest month to fly to Caribbean Islands from St. Louis, with most prices found around $291. The month of April is another great option to travel to Caribbean Islands, with average flight prices from St. Louis averaging around $368.

What is the cheapest day to depart on your flight to Caribbean Islands?

The cheapest day to depart from St. Louis to Caribbean Islands is on a Wednesday. Travelers who choose to depart for Caribbean Islands on a Wednesday will often find tickets for as low as $404. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $636. These prices are subject to change though, so be sure to set up a Price Alert for flights to Caribbean Islands.

What is the cheapest time of day to depart on your flight to Caribbean Islands?

According to our data, the cheapest time of day to fly to Caribbean Islands is in the evening. momondo users have found flights departing from St. Louis to Caribbean Islands in the evening for as low as $310. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets at noon because they tend to be around $660. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Lambert-St Louis to Caribbean Islands flight route?

Fly from Lambert-St Louis to Montego Bay Sangster Intl for the best Lambert-St Louis - Caribbean Islands flight prices

How far in advance should I book a flight to Caribbean Islands?

You are more likely to see cheaper flights to Caribbean Islands from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Caribbean Islands for around $448 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Caribbean Islands from St. Louis for as low as $331 on momondo.

What cabin class options are available on Lambert-St Louis to Caribbean Islands flights?

There is only 1 cabin class available to choose from on Lambert-St Louis to Caribbean Islands flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on St. Louis to Caribbean Islands flights?

No. A direct flight is the cheapest option for a flight between St. Louis to Caribbean Islands.

Cheap St. Louis to Caribbean Islands flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Caribbean Islands

Fastest flight time

3h 30m

Direct flights

Tue, Thu, Sat and Sun

Airports in Caribbean Islands

3 airports
The fastest flight from St. Louis to Caribbean Islands takes 3h 30m
Direct flights go from St. Louis to Caribbean Islands on Tuesday, Thursday, Saturday and Sunday. There are no airlines offering direct flights.
There are 3 airports near Caribbean Islands: Montego Bay Sangster Intl (MBJ), Punta Cana (PUJ), San Juan Luis Munoz Marin Intl (SJU)
Search flight deals

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Caribbean Islands?

    Prices for flights from Lambert-St Louis Airport to Caribbean Islands were last updated today.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Caribbean Islands?

  • How old do you have to be to fly from Lambert-St Louis Airport to Caribbean Islands?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Caribbean Islands.

  • What documentation or ID do you need to fly to Caribbean Islands?

    The required travel and health documents for your Caribbean Islands trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Caribbean Islands. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from St. Louis to Caribbean Islands?

Best airlines flying from St. Louis to Caribbean Islands

Compare and see reviews for airlines that fly from St. Louis to Caribbean Islands with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $140Free CancellationRating
5.8
3,161 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $170Free CancellationRating
6.3
8,051 reviews
Search Spirit Airlines flights
DeltaPriceFrom $208Free CancellationRating
7.9
7,973 reviews
Search Delta flights
United AirlinesPriceFrom $219Free CancellationRating
7.4
8,928 reviews
Search United Airlines flights
SouthwestPriceFrom $219Free CancellationRating
8.0
4,245 reviews
Search Southwest flights
American AirlinesPriceFrom $254Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Caribbean Islands?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Caribbean Islands. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Caribbean Islands with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Caribbean Islands from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Caribbean Islands?

momondo helps you find the best flight between St. Louis and Caribbean Islands by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from St. Louis to Caribbean Islands right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to Caribbean Islands flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Caribbean Islands trip

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