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Saint Lucia

$529+ 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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
STL — UVF
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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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 January 21, 2026.

This Air Canada deal was found by Cheapflights users on 1/20. 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.
Sat 1/244:05 pm
STL
-
UVF
1 stop22h 20m
Air Canada
Mon 1/265:15 pm
UVF
-
STL
1 stop24h 14m
Air Canada
Deal found 1/20$529
This Mytrip deal was found by Cheapflights users on 1/20. 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 1/214:05 pm
STL
-
UVF
1 stop22h 20m
Air Canada
Wed 1/285:15 pm
UVF
-
STL
1 stop24h 14m
Air Canada
Deal found 1/20$539
This Air Canada deal was found by Cheapflights users on 1/20. 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.
Sun 2/14:05 pm
STL
-
UVF
1 stop22h 20m
Air Canada
Thu 2/55:15 pm
UVF
-
STL
1 stop24h 14m
Air Canada
Deal found 1/20$595
This American Airlines deal was found by Cheapflights users on 1/20. 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.
Wed 9/165:33 am
STL
-
UVF
1 stop7h 17m
American Airlines
Wed 9/234:00 pm
UVF
-
STL
1 stop8h 12m
American Airlines
Deal found 1/20$596
This American Airlines deal was found by Cheapflights users on 1/19. 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 10/176:28 pm
STL
-
UVF
2 stops18h 07m
American Airlines
Fri 10/234:00 pm
UVF
-
STL
2 stops17h 50m
American Airlines
Deal found 1/19$601
This Air Canada deal was found by Cheapflights users on 1/20. 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.
Sat 3/74:05 pm
STL
-
UVF
1 stop21h 20m
Air Canada
Thu 3/124:15 pm
UVF
-
STL
1 stop24h 14m
Air Canada
Deal found 1/20$619
This American Airlines deal was found by Cheapflights users on 1/20. 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.
Thu 9/35:52 pm
STL
-
UVF
2 stops19h 23m
American Airlines
Tue 9/83:15 pm
UVF
-
STL
2 stops22h 47m
American Airlines
Deal found 1/20$626
This American Airlines deal was found by Cheapflights users on 1/20. 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 5/125:24 am
STL
-
UVF
1 stop7h 11m
American Airlines
Mon 5/182:35 pm
UVF
-
STL
1 stop20h 41m
American Airlines
Deal found 1/20$646
This American Airlines deal was found by Cheapflights users on 1/20. 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 7/75:23 am
STL
-
UVF
1 stop7h 47m
American Airlines
Tue 7/142:58 pm
UVF
-
STL
2 stops20h 03m
American Airlines
Deal found 1/20$655
This American Airlines deal was found by Cheapflights users on 1/21. 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.
Thu 10/294:51 pm
STL
-
UVF
1 stop19h 34m
American Airlines
Sat 11/74:04 pm
UVF
-
STL
1 stop10h 01m
American Airlines
Deal found 1/21$656
This Orbitz deal was found by Cheapflights users on 1/19. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:30 am
STL
-
SLU
2 stops25h 00m
Multiple Airlines
Mon 5/187:10 pm
SLU
-
STL
2 stops41h 56m
Multiple Airlines
Deal found 1/19$3,655
This Orbitz deal was found by Cheapflights users on 1/20. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/169:10 am
STL
-
SLU
2 stops52h 25m
Multiple Airlines
Wed 9/2310:15 am
SLU
-
STL
3 stops54h 01m
Multiple Airlines
Deal found 1/20$3,717

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 January 21, 2026.

Round-trip from

$595
(Air Canada)

Popular in

June

Cheapest in

July

Average price

$926
From Lambert-St Louis to Saint Lucia
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($232 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 January 2026
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 January 21, 2026.
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

Tue 5/12

5:24 am-1:35 pm

1 stop7h 11m

Castries Hewanorra

Mon 5/18

2:35 pm-10:16 am

1 stop20h 41m

$646

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Tue 7/7

5:23 am-2:10 pm

1 stop7h 47m

Castries Hewanorra

Tue 7/14

2:58 pm-10:01 am

2 stops20h 03m

$655

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 2/16

5:14 am-3:58 pm

1 stop8h 44m

Castries Hewanorra

Mon 2/23

4:58 pm-11:01 am

2 stops20h 03m

$668

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Wed 2/18

6:36 pm-3:18 pm

2 stops18h 42m

Castries Hewanorra

Mon 2/23

4:58 pm-11:01 am

2 stops20h 03m

$693

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Tue 5/12

7:30 am-9:30 am

2 stops25h 00m

Castries George F. L. Charle

Mon 5/18

7:10 pm-12:06 pm

2 stops41h 56m

$3,655

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Thu 3/5

4:05 pm-5:15 pm

2 stops23h 10m

Castries George F. L. Charle

Mon 3/9

7:10 pm-3:29 pm

2 stops45h 19m

$4,450

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

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 June is currently the most expensive (average of $707). 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 January 21, 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
8,088 reviews

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

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
8,088 reviews
Delta
7.9
Good
8,088 reviews

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

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
11,174 reviews
Delta
7.9
Good
8,088 reviews

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

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?

    American Airlines can get you from St. Louis to Saint Lucia in just under 7h 11m. Your travel time can differ by up to . St. Louis and Saint Lucia are separated by a distance of 2489 mi.

  • 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 June is currently the most expensive (average of $707). 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.
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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 January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$532Average$763FlexibilityNo cancel feeOn-time71%
DeltaCheapest$570Average$745FlexibilityNo cancel feeOn-timeN/A

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