HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Saint Lucia

$552+ Cheap flights from St. Louis (STL) to Saint Lucia

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — UVF
jan. 8 — jan. 151
do 1/8
do 1/15
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 december 9, 2025.

This American Airlines deal was found by Cheapflights users on 12/7. 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.
ma 12/85:10 amSTL - UVF
1 stop8h 43mAmerican Airlines
ma 12/154:00 pmUVF - STL
1 stop9h 06mAmerican Airlines
Deal found 12/7$966
This American Airlines deal was found by Cheapflights users on 12/7. 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.
zo 12/146:13 pmSTL - UVF
2 stops19h 40mAmerican Airlines
wo 12/314:54 pmUVF - STL
2 stops21h 38mAmerican Airlines
Deal found 12/7$967
This American Airlines deal was found by Cheapflights users on 12/6. 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.
wo 12/106:00 pmSTL - UVF
2 stops19h 53mAmerican Airlines
vr 12/124:53 pmUVF - STL
2 stops17h 31mAmerican Airlines
Deal found 12/6$1,025
This American Airlines deal was found by Cheapflights users on 12/7. 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.
do 12/115:10 amSTL - UVF
1 stop8h 43mAmerican Airlines
za 12/132:23 pmUVF - STL
1 stop11h 36mAmerican Airlines
Deal found 12/7$1,045
This American Airlines deal was found by Cheapflights users on 12/6. 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.
ma 12/225:05 amSTL - UVF
1 stop8h 48mAmerican Airlines
ma 12/292:04 pmUVF - STL
1 stop10h 31mAmerican Airlines
Deal found 12/6$1,430
This Mytrip deal was found by Cheapflights users on 12/7. 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.
zo 12/146:30 amSTL - SLU
3 stops31h 05mMultiple Airlines
za 1/106:20 pmSLU - STL
2 stops23h 09mMultiple Airlines
Deal found 12/7$2,147
This Mytrip deal was found by Cheapflights users on 12/7. 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.
zo 12/148:00 amSTL - SLU
3 stops29h 35mMultiple Airlines
wo 12/319:10 amSLU - STL
2 stops32h 19mMultiple Airlines
Deal found 12/7$2,268

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 december 9, 2025.

Round-trip from

$552
(Air Canada)

Popular in

June

Cheapest in

July

Average price

$833
From Lambert-St Louis to Saint Lucia
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($245 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($78 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 december 9, 2025.
Use the filters below to find and compare flights from St. Louis to Saint Lucia that are best for you.

Fly from

St. Louis

Fly to

Saint Lucia

Route

Depart

Return

Price

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

di 2/3

4:05 pm-4:20 pm

1 stop22h 15m

Castries Hewanorra

wo 2/11

5:15 pm-3:29 pm

1 stop24h 14m

$552

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

ma 2/2

6:57 pm-3:05 pm

1 stop18h 08m

Castries Hewanorra

wo 2/11

4:25 pm-11:37 pm

1 stop9h 12m

$575

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

ma 2/2

5:05 am-4:02 pm

1 stop8h 57m

Castries Hewanorra

ma 2/9

2:46 pm-11:59 pm

1 stop11h 13m

$600

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

zo 2/1

6:57 pm-3:05 pm

1 stop18h 08m

Castries Hewanorra

zo 2/8

4:25 pm-8:53 am

1 stop18h 28m

$600

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

zo 2/1

6:57 pm-3:05 pm

1 stop18h 08m

Castries Hewanorra

ma 2/9

4:25 pm-11:37 pm

1 stop9h 12m

$600

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

ma 2/2

6:00 am-3:05 pm

1 stop7h 05m

Castries Hewanorra

zo 2/8

4:25 pm-8:53 am

1 stop18h 28m

$600

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

di 2/3

6:00 am-3:05 pm

1 stop7h 05m

Castries Hewanorra

zo 2/8

4:25 pm-8:53 am

1 stop18h 28m

$600

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

di 2/3

6:00 am-3:05 pm

1 stop7h 05m

Castries Hewanorra

ma 2/9

4:25 pm-8:53 am

1 stop18h 28m

$600

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

za 1/24

3:54 pm-1:46 pm

2 stops19h 52m

Castries Hewanorra

vr 1/30

5:02 pm-9:08 am

1 stop18h 06m

$601

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

za 1/31

3:54 pm-4:02 pm

2 stops22h 08m

Castries Hewanorra

za 2/7

5:02 pm-9:24 am

2 stops18h 22m

$605

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

Showing 1-10 of 12 results
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, October is the cheapest month in which you can book a flight from St. Louis to Saint Lucia (average of $550). Flying from St. Louis to Saint Lucia in July is currently the most expensive (average of $674). 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 december 9, 2025.
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
8,011 reviews

Crew

8.5

Boarding

8.1

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

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
8,011 reviews
Delta
7.9
Good
8,011 reviews

Crew

8.5

Boarding

8.1

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

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
7.2
Good
11,045 reviews
Delta
7.9
Good
8,011 reviews

Crew

8.5

Boarding

8.1

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

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?

    Air Canada and Delta can get you from St. Louis to Saint Lucia in just under 18h 08m. Your travel time can differ by up to 4h 07m. 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, October is the cheapest month in which you can book a flight from St. Louis to Saint Lucia (average of $550). Flying from St. Louis to Saint Lucia in July is currently the most expensive (average of $674). 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.

Alternative routes for St. Louis to Saint Lucia

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Luis Munoz Marin Intl flights
St. Louis to Luis Munoz Marin Intl flights
St. Louis to Punta Cana flights
Kansas City to Punta Cana flights
Kansas City to Castries flights
St. Louis to Oranjestad flights
St. Louis to Saint Thomas Island flights
Kansas City to Saint Thomas Island flights
St. Louis to Simpson Bay flights
Springfield to Luis Munoz Marin Intl flights
Kansas City to Montego Bay flights
Kansas City to George Town flights
St. Louis to Nassau flights
St. Louis to Willemstad flights
Kansas City to Providenciales flights
Kansas City to Oranjestad flights
Kansas City to Nassau flights
St. Louis to Montego Bay flights
St. Louis to Providenciales flights
Kansas City to Santo Domingo flights
St. Louis to Santo Domingo flights
Kansas City to Willemstad flights
Kansas City to Simpson Bay flights
St. Louis to Georgetown flights
St. Louis to Bridgetown flights
Springfield to Punta Cana flights
St. Louis to Castries flights
St. Louis to Christiansted flights
Kansas City to Christiansted flights
Springfield to Oranjestad flights
Kansas City to Gregory Town flights
St. Louis to George Town flights
St. Louis to St. John's flights
St. Louis to Kralendijk flights
Springfield to Montego Bay flights
Springfield to Saint Thomas Island flights
Kansas City to St. John's flights
Kansas City to Road Town flights
Kansas City to Kingston flights
Springfield to Providenciales flights
St. Louis to Freeport flights
St. Louis to Basseterre flights
St. Louis to Puerto Plata flights
St. Louis to Road Town flights
St. Louis to Santiago de los Caballeros flights
Kansas City to Santiago de los Caballeros flights
Kansas City to Puerto Plata flights
Kansas City to Marsh Harbour flights
Kansas City to Bridgetown flights

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 december 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$565Average$720FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$568Average$763FlexibilityNo cancel feeOn-time71%

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.