HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Saint Lucia

$229+ Cheap flights from St. Louis (STL) to Saint Lucia

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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
STL — UVF
Apr 30 — May 71
Thu 4/30
Thu 5/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Saint Lucia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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 Saint Lucia

Cheapest flights from St. Louis to Saint Lucia
Explore the most affordable flight options available from St. Louis to Saint Lucia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2026.

This Air Canada deal was found by Cheapflights users on 3/31. 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.
Mon 8/102:40 pm
STL
-
UVF
1 stop22h 40m
Air Canada
Tue 8/183:15 pm
UVF
-
STL
1 stop23h 47m
Air Canada
Deal found 3/31$526
This FlightHub deal was found by Cheapflights users on 3/31. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1612:10 pm
STL
-
UVF
2 stops49h 10m
Air Canada
Fri 8/213:15 pm
UVF
-
STL
1 stop23h 47m
Air Canada
Deal found 3/31$539
This American Airlines deal was found by Cheapflights users on 3/31. 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.
Sun 8/164:32 pm
STL
-
UVF
1 stop20h 43m
American Airlines
Fri 8/213:15 pm
UVF
-
STL
1 stop9h 40m
American Airlines
Deal found 3/31$700
This Delta deal was found by Cheapflights users on 3/30. 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 7/76:00 am
STL
-
UVF
1 stop7h 12m
Delta
Sat 7/113:33 pm
UVF
-
STL
1 stop9h 07m
Delta
Deal found 3/30$725
This Delta deal was found by Cheapflights users on 3/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:00 am
STL
-
UVF
1 stop7h 05m
Delta
Tue 5/193:25 pm
UVF
-
STL
1 stop9h 34m
Delta
Deal found 3/27$728
This American Airlines deal was found by Cheapflights users on 3/31. 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 11/73:23 pm
STL
-
UVF
2 stops19h 58m
American Airlines
Sat 11/144:50 pm
UVF
-
STL
2 stops19h 47m
American Airlines
Deal found 3/31$730
This American Airlines deal was found by Cheapflights users on 3/31. 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.
Fri 5/151:29 pm
STL
-
UVF
1 stop22h 40m
American Airlines
Fri 5/221:05 pm
UVF
-
STL
1 stop10h 53m
American Airlines
Deal found 3/31$746
This Mytrip deal was found by Cheapflights users on 3/30. 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.
Wed 6/171:05 pm
STL
-
SLU
3 stops28h 55m
Multiple Airlines
Sun 6/219:10 am
SLU
-
STL
2 stops28h 11m
Multiple Airlines
Deal found 3/30$1,204
This Mytrip deal was found by Cheapflights users on 3/29. 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.
Wed 5/132:15 pm
STL
-
SLU
2 stops21h 55m
Multiple Airlines
Wed 5/2010:15 am
SLU
-
STL
2 stops26h 51m
Multiple Airlines
Deal found 3/29$1,598
This Booking.com deal was found by Cheapflights users on 3/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/78:55 am
STL
-
SLU
2 stops23h 35m
Multiple Airlines
Sat 7/115:50 pm
SLU
-
STL
2 stops21h 12m
Multiple Airlines
Deal found 3/30$1,881
This Gotogate deal was found by Cheapflights users on 3/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:15 pm
STL
-
SLU
2 stops16h 15m
Multiple Airlines
Sat 10/315:50 pm
SLU
-
STL
2 stops23h 40m
Multiple Airlines
Deal found 3/27$3,727

Find flight deals from St. Louis to Saint Lucia

Keep the following information in mind while searching for St. Louis to Saint Lucia flight deals. Data was last updated March 31, 2026.

Round-trip from

$526
(Air Canada)

One-way from

$229
(Travelocity)
From Lambert-St Louis to Saint Lucia
Search Deals
One-way flight from Lambert-St Louis to Saint Lucia
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Saint Lucia 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 March 31, 2026.
Use the filters below to find and compare flights from St. Louis to Saint Lucia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Tue 7/7

6:00 am-2:12 pm

1 stop7h 12m

Castries Hewanorra

Mon 7/13

3:33 pm-11:53 pm

1 stop9h 20m

$725

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Tue 7/7

6:00 am-2:12 pm

1 stop7h 12m

Castries Hewanorra

Sat 7/11

3:33 pm-11:40 pm

1 stop9h 07m

$725

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Tue 5/12

6:00 am-2:05 pm

1 stop7h 05m

Castries Hewanorra

Tue 5/19

3:25 pm-11:59 pm

1 stop9h 34m

$728

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Thu 8/6

5:52 pm-2:09 pm

2 stops19h 17m

Castries Hewanorra

Thu 8/13

3:15 pm-8:44 am

2 stops18h 29m

$730

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sat 7/4

6:12 pm-2:00 pm

2 stops18h 48m

Castries Hewanorra

Sat 7/11

2:22 pm-11:33 pm

1 stop10h 11m

$790

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sat 5/9

6:00 am-2:09 pm

1 stop7h 09m

Castries Hewanorra

Fri 5/15

3:25 pm-11:59 pm

1 stop9h 34m

$793

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Tue 7/7

5:10 am-2:14 pm

1 stop8h 04m

Castries Hewanorra

Sat 7/11

1:08 pm-8:31 am

2 stops20h 23m

$800

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Tue 7/7

5:41 pm-2:14 pm

2 stops19h 33m

Castries Hewanorra

Mon 7/13

3:14 pm-10:38 am

2 stops20h 24m

$910
Quickest round-trip

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Wed 9/23

5:33 am-1:50 pm

1 stop7h 17m

Castries Hewanorra

Sun 9/27

4:00 pm-11:12 pm

1 stop8h 12m

$928

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Wed 6/17

1:05 pm-7:00 pm

3 stops28h 55m

Castries George F. L. Charle

Sun 6/21

9:10 am-12:21 pm

2 stops28h 11m

$1,204

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Best time to book a flight from St. Louis to Saint Lucia

Have a flexible travel schedule? Discover the best time to fly to Saint Lucia 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 Saint Lucia

What is the cheapest month to book a flight from St. Louis to Saint Lucia?

Currently, December is the cheapest month in which you can book a flight from St. Louis to Saint Lucia (average of $565). Flying from St. Louis to Saint Lucia in June is currently the most expensive (average of $803). 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.

Reviews of airlines servicing Saint Lucia

Get insights into the airlines that provide service to Saint Lucia. 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 Saint Lucia. Reviews last updated March 31, 2026.
Peruse reviews from past customers who have flown with Delta and American Airlines from St. Louis to Saint Lucia 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.
Delta
7.9
Good
8,368 reviews

Crew

8.5

Food

7.2

Boarding

8.1

Entertainment

7.8

Overall

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,368 reviews
Delta
7.9
Good
8,368 reviews

Crew

8.5

Food

7.2

Boarding

8.1

Entertainment

7.8

Overall

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.1
Good
11,544 reviews
Delta
7.9
Good
8,368 reviews

Crew

8.5

Food

7.2

Boarding

8.1

Entertainment

7.8

Overall

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Saint Lucia. 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 Saint Lucia?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Saint Lucia. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

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

    Delta and American Airlines can get you from St. Louis to Saint Lucia in just under 7h 12m. Your travel time can differ by up to 12h 05m. St. Louis and Saint Lucia are separated by a distance of 2489 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Saint Lucia 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 Saint Lucia?

    Currently, December is the cheapest month in which you can book a flight from St. Louis to Saint Lucia (average of $565). Flying from St. Louis to Saint Lucia in June is currently the most expensive (average of $803). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 2 airlines flying from St. Louis to Saint Lucia

Discover the top 2 airlines that operate flights from St. Louis to Saint Lucia. 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 March 31, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$575Average$731FlexibilityNo cancel feeOn-time71%
DeltaCheapest$575Average$775FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.