What is the cheapest airline that flies from Lambert-St Louis to Caribbean Islands?

American Airlines, Delta, and United Airlines are the most popular carriers operating from Lambert-St Louis to Caribbean Islands

How many flights depart from St. Louis to Caribbean Islands on average per week?

As of August 2026, there are 4 flights per week flying from St. Louis to Caribbean Islands. The most common day of the week flights depart is Mon, with 25% of flights taking off on this day.

What airlines fly to Caribbean Islands?

American Airlines, Frontier and Delta are the top three most popular airlines that fly to Caribbean Islands from St. Louis according to our data. American Airlines is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Caribbean Islands. Keep in mind that there are 5 different airlines that fly to Caribbean Islands on a routine basis, so you have a few additional options to choose from.

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?

As of August 2026, there are 6 operators available to choose from 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.

$116 Cheap Flights from St. Louis to Caribbean Islands in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Caribbean Islands

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:29 pm - 4:45 pmSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

25h 16m2 stops Atlanta Hartsfield-Jackson Tampa

6:30 am - 1:10 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

7h 40m1 stop Atlanta Hartsfield-Jackson

$272Frontier

Mon, Sep 21 - Mon, Sep 28

2:29 pm - 4:45 pmSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

25h 16m2 stops Atlanta Hartsfield-Jackson Tampa

6:30 am - 1:10 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

7h 40m1 stop Atlanta Hartsfield-Jackson

$276Frontier

Mon, Sep 21 - Mon, Sep 28

5:45 pm - 9:24 amSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

14h 39m2 stops Philadelphia Miami

2:58 pm - 12:27 amSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

10h 29m2 stops Miami Chicago O'Hare Intl

$356American Airlines

Fri, Sep 18 - Tue, Sep 22

5:00 am - 8:47 pmSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

14h 47m1 stop Miami

2:58 pm - 10:42 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

8h 44m2 stops Miami Charlotte Douglas

$356American Airlines

Thu, Sep 17 - Mon, Sep 21

7:00 am - 5:49 pmSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

8h 49m1 stop Atlanta Hartsfield-Jackson

3:35 pm - 9:33 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

7h 58m1 stop Atlanta Hartsfield-Jackson

$356Delta

Sun, Nov 8 - Wed, Dec 2

6:00 am - 4:49 pmSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

9h 49m1 stop Atlanta Hartsfield-Jackson

7:00 am - 1:23 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

7h 23m1 stop Atlanta Hartsfield-Jackson

$356Delta

Mon, Sep 21 - Tue, Sep 29

8:00 am - 8:38 pmSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

11h 38m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

1:00 am - 10:12 amSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

10h 12m2 stops Newark Chicago O'Hare Intl

$356United Airlines

Sat, Sep 5 - Fri, Sep 11

12:27 pm - 11:50 pmSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

10h 23m1 stop Newark

7:00 am - 2:15 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

8h 15m1 stop Houston George Bush Intcntl

$356United Airlines

Wed, Sep 2 - Sun, Sep 6

2:30 pm - 12:20 amSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

8h 50m2 stops Nashville Intl Orlando

5:30 am - 7:05 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

14h 35m2 stops Baltimore/Washington Milwaukee-Mitchell

$356Southwest

Mon, Oct 19 - Thu, Oct 22

2:25 pm - 11:45 pmSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

8h 20m2 stops Chicago Midway Orlando

5:35 am - 2:05 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

10h 30m2 stops Orlando Atlanta Hartsfield-Jackson

$356Southwest

Wed, Oct 28 - Mon, Nov 2

Cheap last minute flights

Enter your travel dates to find the best prices.

7:10 pm - 12:28 amSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

28h 18m2 stops Las Vegas Harry Reid Intl Miami

8:37 pm - 11:59 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

28h 22m1 stop Orlando

$450Frontier

Sat, Aug 8 - Sat, Aug 15

4:09 pm - 2:15 amSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

9h 06m1 stop Orlando

3:10 am - 11:59 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

21h 49m1 stop Orlando

$466Frontier

Sat, Aug 8 - Fri, Aug 14

5:42 am - 6:30 pmSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

11h 48m2 stops Dallas/Fort Worth Miami

6:00 am - 4:14 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

11h 14m2 stops Miami Dallas/Fort Worth

$601American Airlines

Sat, Aug 8 - Sat, Aug 15

6:36 am - 6:30 pmSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

10h 54m2 stops Dallas/Fort Worth Miami

1:38 pm - 10:40 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

10h 02m1 stop Miami

$601American Airlines

Sat, Aug 8 - Sat, Aug 15

7:10 pm - 8:15 amSTL Lambert-St Louis-PUJ Punta Cana

36h 05m2 stops Las Vegas Harry Reid Intl Miami

3:31 pm - 8:57 amPUJ Punta Cana-STL Lambert-St Louis

18h 26m1 stop Atlanta Hartsfield-Jackson

$829Multiple Airlines

Fri, Aug 7 - Fri, Aug 14

7:10 pm - 8:15 amSTL Lambert-St Louis-PUJ Punta Cana

36h 05m2 stops Las Vegas Harry Reid Intl Miami

11:34 am - 3:12 pmPUJ Punta Cana-STL Lambert-St Louis

4h 38mnonstop

$845Multiple Airlines

Fri, Aug 7 - Fri, Aug 14

8:00 am - 9:24 pmSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

12h 24m2 stops Chicago O'Hare Intl Washington, D.C. Reagan-National

1:00 am - 12:11 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

12h 11m2 stops Newark Chicago O'Hare Intl

$866United Airlines

Fri, Aug 7 - Sat, Aug 8

10:05 am - 8:05 pmSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

9h 00m2 stops Nashville Intl Orlando

6:35 am - 2:25 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

8h 50m2 stops Orlando Nashville Intl

$896Southwest

Fri, Aug 7 - Sun, Aug 9

10:05 am - 8:05 pmSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

9h 00m2 stops Nashville Intl Orlando

6:35 am - 2:25 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

8h 50m2 stops Orlando Nashville Intl

$936Southwest

Fri, Aug 7 - Sun, Aug 9

1:13 pm - 1:30 pmSTL Lambert-St Louis-MBJ Montego Bay Sangster Intl

24h 17m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

12:52 pm - 12:02 pmMBJ Montego Bay Sangster Intl-STL Lambert-St Louis

47h 10m3 stops Newark Cleveland Hopkins Intl Chicago O'Hare Intl

$1,144United Airlines

Sun, Aug 9 - Sun, Aug 16

Cheap direct flights

Enter your travel dates to find the best prices.

12:05 pm - 6:25 pmSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

4h 20mnonstop

10:55 am - 1:55 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

5h 00mnonstop

$477Southwest

Sat, Nov 28 - Sat, Dec 5

8:24 am - 2:40 pmSTL Lambert-St Louis-PUJ Punta Cana

4h 16mnonstop

10:17 am - 1:16 pmPUJ Punta Cana-STL Lambert-St Louis

4h 59mnonstop

$577Frontier

Sat, Dec 12 - Sat, Dec 19

8:24 am - 2:40 pmSTL Lambert-St Louis-PUJ Punta Cana

4h 16mnonstop

10:17 am - 1:16 pmPUJ Punta Cana-STL Lambert-St Louis

4h 59mnonstop

$577Frontier

Wed, Dec 2 - Sat, Dec 5

8:24 am - 2:40 pmSTL Lambert-St Louis-PUJ Punta Cana

4h 16mnonstop

10:17 am - 1:16 pmPUJ Punta Cana-STL Lambert-St Louis

4h 59mnonstop

$577Frontier

Wed, Dec 2 - Wed, Dec 9

8:24 am - 2:40 pmSTL Lambert-St Louis-PUJ Punta Cana

4h 16mnonstop

10:17 am - 1:16 pmPUJ Punta Cana-STL Lambert-St Louis

4h 59mnonstop

$577Frontier

Sat, Dec 12 - Sat, Dec 19

8:24 am - 2:40 pmSTL Lambert-St Louis-PUJ Punta Cana

4h 16mnonstop

10:17 am - 1:16 pmPUJ Punta Cana-STL Lambert-St Louis

4h 59mnonstop

$587Frontier

Fri, Dec 4 - Wed, Dec 9

8:24 am - 2:40 pmSTL Lambert-St Louis-PUJ Punta Cana

4h 16mnonstop

10:17 am - 1:16 pmPUJ Punta Cana-STL Lambert-St Louis

4h 59mnonstop

$605Frontier

Sat, Dec 12 - Sat, Dec 19

8:24 am - 2:40 pmSTL Lambert-St Louis-PUJ Punta Cana

4h 16mnonstop

10:17 am - 1:16 pmPUJ Punta Cana-STL Lambert-St Louis

4h 59mnonstop

$605Frontier

Sat, Dec 12 - Sat, Dec 19

12:05 pm - 6:25 pmSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

4h 20mnonstop

5:15 pm - 8:15 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

5h 00mnonstop

$787Southwest

Sat, Nov 21 - Sat, Nov 28

12:05 pm - 6:25 pmSTL Lambert-St Louis-SJU San Juan Luis Munoz Marin Intl

4h 20mnonstop

5:15 pm - 8:15 pmSJU San Juan Luis Munoz Marin Intl-STL Lambert-St Louis

5h 00mnonstop

$1,937Southwest

Sat, Dec 26 - Sat, Jan 2

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Frontier flights from St. Louis to Caribbean Islands

Our best Frontier deals on St. Louis to Caribbean Islands flight tickets

Frontier

Sep 21

STL2:29 pmLambert-St Louis

25h 16m

2 stops

SJU4:45 pmSan Juan Luis Munoz Marin Intl

Sep 28

SJU6:30 amSan Juan Luis Munoz Marin Intl

7h 40m

1 stop

STL1:10 pmLambert-St Louis

$272

Frontier

Sep 21

STL2:29 pmLambert-St Louis

25h 16m

2 stops

SJU4:45 pmSan Juan Luis Munoz Marin Intl

Sep 28

SJU6:30 amSan Juan Luis Munoz Marin Intl

7h 40m

1 stop

STL1:10 pmLambert-St Louis

$276

Frontier

Oct 19

STL10:35 amLambert-St Louis

12h 03m

2 stops

SJU11:38 pmSan Juan Luis Munoz Marin Intl

Oct 22

SJU3:51 pmSan Juan Luis Munoz Marin Intl

18h 49m

1 stop

STL9:40 amLambert-St Louis

$277

American Airlines flights from St. Louis to Caribbean Islands

Our best American Airlines deals on St. Louis to Caribbean Islands flight tickets

American Airlines

Jan 27

STL6:09 pmLambert-St Louis

14h 39m

1 stop

SJU10:48 amSan Juan Luis Munoz Marin Intl

Feb 8

SJU6:00 amSan Juan Luis Munoz Marin Intl

17h 08m

1 stop

STL9:08 pmLambert-St Louis

$361

American Airlines

Sep 8

STL11:35 amLambert-St Louis

6h 36m

1 stop

NAS7:11 pmNassau Intl

Sep 11

NAS6:45 pmNassau Intl

6h 14m

1 stop

STL11:59 pmLambert-St Louis

$378

American Airlines

Sep 8

STL6:00 amLambert-St Louis

10h 51m

2 stops

NAS5:51 pmNassau Intl

Sep 11

NAS2:34 pmNassau Intl

9h 08m

2 stops

STL10:42 pmLambert-St Louis

$382

momondo Fare Finder

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

Cheapest round-trip

St. LouisSan Juan

STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl

STLSJU

Lambert-St Louis

Mon 9/21

2:29 pm-4:45 pm

2 stops25h 16m

San Juan Luis Munoz Marin Intl

Mon 9/28

6:30 am-1:10 pm

1 stop7h 40m

$272

St. LouisSan Juan

STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl

STLSJU

Lambert-St Louis

Mon 9/21

2:29 pm-4:45 pm

2 stops25h 16m

San Juan Luis Munoz Marin Intl

Mon 9/28

6:30 am-1:10 pm

1 stop7h 40m

$276

St. LouisSan Juan

STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl

STLSJU

Lambert-St Louis

Fri 9/18

5:45 pm-9:24 am

2 stops14h 39m

San Juan Luis Munoz Marin Intl

Tue 9/22

2:58 pm-12:27 am

2 stops10h 29m

$356

St. LouisSan Juan

STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl

STLSJU

Lambert-St Louis

Thu 9/17

5:00 am-8:47 pm

1 stop14h 47m

San Juan Luis Munoz Marin Intl

Mon 9/21

2:58 pm-10:42 pm

2 stops8h 44m

$356

Quickest round-trip

St. LouisSan Juan

STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl

STLSJU

Lambert-St Louis

Sun 11/8

7:00 am-5:49 pm

1 stop8h 49m

San Juan Luis Munoz Marin Intl

Wed 12/2

3:35 pm-9:33 pm

1 stop7h 58m

$356

St. LouisSan Juan

STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl

STLSJU

Lambert-St Louis

Mon 9/21

6:00 am-4:49 pm

1 stop9h 49m

San Juan Luis Munoz Marin Intl

Tue 9/29

7:00 am-1:23 pm

1 stop7h 23m

$356

St. LouisSan Juan

STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl

STLSJU

Lambert-St Louis

Sat 9/5

8:00 am-8:38 pm

2 stops11h 38m

San Juan Luis Munoz Marin Intl

Fri 9/11

1:00 am-10:12 am

2 stops10h 12m

$356

St. LouisSan Juan

STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl

STLSJU

Lambert-St Louis

Wed 9/2

12:27 pm-11:50 pm

1 stop10h 23m

San Juan Luis Munoz Marin Intl

Sun 9/6

7:00 am-2:15 pm

1 stop8h 15m

$356

St. LouisSan Juan

STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl

STLSJU

Lambert-St Louis

Mon 10/19

2:30 pm-12:20 am

2 stops8h 50m

San Juan Luis Munoz Marin Intl

Thu 10/22

5:30 am-7:05 pm

2 stops14h 35m

$356

St. LouisSan Juan

STL Lambert-St Louis - SJU San Juan Luis Munoz Marin Intl

STLSJU

Lambert-St Louis

Wed 10/28

2:25 pm-11:45 pm

2 stops8h 20m

San Juan Luis Munoz Marin Intl

Mon 11/2

5:35 am-2:05 pm

2 stops10h 30m

$356

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

What is the cheapest month to fly to Caribbean Islands?

The month of February is, on average, the cheapest month to fly to Caribbean Islands from St. Louis, with most prices found around $576. The month of April is another great option to travel to Caribbean Islands, with average flight prices from St. Louis averaging around $584.

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

Fly from Lambert-St Louis to San Juan Luis Munoz Marin Intl for the best Lambert-St Louis - Caribbean Islands flight prices

How far in advance should I book a flight from St. Louis 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 $427 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 $350 on momondo.

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

There is only 1 cabin class available to choose from on 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	4h 16m
Direct flights	Tue, Thu, Sat and Sun
Airports in Caribbean Islands	100 airports

The fastest flight from St. Louis to Caribbean Islands takes 4h 16m

Direct flights go from St. Louis to Caribbean Islands on Tuesday, Thursday, Saturday and Sunday. There are no airlines offering direct flights.

There are 100 airports in Caribbean Islands. From St. Louis there are direct flights to Punta Cana (PUJ), San Juan Luis Munoz Marin Intl (SJU).

Search flight deals

Frequently asked questions about flying from St. Louis to Caribbean Islands

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?
As of August 2026, there are 6 operators available to choose from 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?
momondo data reveals that the most frequently booked plane model on the route from St. Louis to Caribbean Islands is Boeing 737 MAX 8, representing 24.84% of all bookings. The subsequent popular models are Boeing 737-800 Passenger/BBJ2 (winglets) at 16.80%, Embraer 175 at 7.35%, and Airbus A319 at 6.77%.

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
Frontier	PriceFrom $148	Free Cancellation	Rating 5.6 2,723 reviews	Search Frontier flights
Delta	PriceFrom $204	Free Cancellation	Rating 7.8 8,491 reviews	Search Delta flights
United Airlines	PriceFrom $225	Free Cancellation	Rating 7.4 10,073 reviews	Search United Airlines flights
American Airlines	PriceFrom $250	Free Cancellation	Rating 7.1 11,865 reviews	Search American Airlines flights
Southwest	PriceFrom $296	Free Cancellation	Rating 8.0 4,218 reviews	Search Southwest 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.