Saint Lucia

$309+ 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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — UVF
Mar 5 — Mar 121
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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 February 3, 2026.

This Air Canada deal was found by Cheapflights users on 2/1. 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.
Wed 3/184:05 pm
STL
-
UVF
1 stop22h 20m
Air Canada
Wed 3/254:20 pm
UVF
-
STL
1 stop24h 09m
Air Canada
Deal found 2/1$546
This American Airlines deal was found by Cheapflights users on 1/31. 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 10/176:04 pm
STL
-
UVF
2 stops18h 21m
American Airlines
Fri 10/234:20 pm
UVF
-
STL
1 stop8h 11m
American Airlines
Deal found 1/31$601
This Delta deal was found by Cheapflights users on 2/1. 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.
Wed 4/156:00 am
STL
-
UVF
1 stop7h 02m
Delta
Tue 4/213:22 pm
UVF
-
STL
1 stop18h 08m
Delta
Deal found 2/1$617
This American Airlines deal was found by Cheapflights users on 2/1. 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 11/76:45 pm
STL
-
UVF
1 stop18h 15m
American Airlines
Sat 11/144:04 pm
UVF
-
STL
1 stop18h 23m
American Airlines
Deal found 2/1$621
This American Airlines deal was found by Cheapflights users on 2/1. 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 5/92:12 pm
STL
-
UVF
2 stops22h 23m
American Airlines
Fri 5/153:28 pm
UVF
-
STL
1 stop18h 02m
American Airlines
Deal found 2/1$636
This Delta deal was found by Cheapflights users on 2/1. 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.
Wed 4/156:00 am
STL
-
UVF
1 stop7h 02m
Delta
Mon 4/203:22 pm
UVF
-
STL
1 stop18h 08m
Delta
Deal found 2/1$642
This American Airlines deal was found by Cheapflights users on 2/3. 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 10/296:28 pm
STL
-
UVF
2 stops18h 07m
American Airlines
Mon 11/24:50 pm
UVF
-
STL
2 stops17h 37m
American Airlines
Deal found 2/3$651
This American Airlines deal was found by Cheapflights users on 2/2. 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 10/812:52 pm
STL
-
UVF
1 stop23h 33m
American Airlines
Mon 10/124:20 pm
UVF
-
STL
1 stop16h 43m
American Airlines
Deal found 2/2$656
This American Airlines deal was found by Cheapflights users on 2/2. 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 10/89:38 am
STL
-
UVF
1 stop26h 47m
American Airlines
Sun 10/114:20 pm
UVF
-
STL
1 stop16h 43m
American Airlines
Deal found 2/2$661
This American Airlines deal was found by Cheapflights users on 2/2. 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.
Mon 3/25:14 am
STL
-
UVF
1 stop7h 34m
American Airlines
Mon 3/93:58 pm
UVF
-
STL
1 stop9h 00m
American Airlines
Deal found 2/2$663
This Expedia deal was found by Cheapflights users on 2/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/24:05 pm
STL
-
SLU
2 stops21h 30m
Multiple Airlines
Mon 3/97:10 pm
SLU
-
STL
2 stops45h 19m
Multiple Airlines
Deal found 2/2$3,683
This Orbitz deal was found by Cheapflights users on 1/31. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/188:55 am
STL
-
SLU
2 stops28h 40m
Multiple Airlines
Fri 7/246:00 pm
SLU
-
STL
3 stops27h 02m
Multiple Airlines
Deal found 1/31$3,970

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 February 3, 2026.

Round-trip from

$546
(Air Canada)

One-way from

$309
(Delta)

Popular in

June

Cheapest in

July

Average price

$741
From Lambert-St Louis to Saint Lucia
One-way flight from Lambert-St Louis to Saint Lucia
Highest demand for flights based on searches. 20% potential increase in price ($232 potential increase over avg. RT price).
Cheapest flight prices on average. 9% potential price decrease ($78 potential savings vs. average RT price).
Average for round-trip flights in February 2026

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 February 3, 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

Wed 4/15

6:00 am-2:02 pm

1 stop7h 02m

Castries Hewanorra

Tue 4/21

3:22 pm-8:30 am

1 stop18h 08m

$617

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Wed 4/15

6:00 am-2:02 pm

1 stop7h 02m

Castries Hewanorra

Mon 4/20

3:22 pm-8:30 am

1 stop18h 08m

$642

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Fri 4/17

6:00 am-2:02 pm

1 stop7h 02m

Castries Hewanorra

Tue 4/21

3:22 pm-8:30 am

1 stop18h 08m

$663

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sat 5/9

2:12 pm-1:35 pm

2 stops22h 23m

Castries Hewanorra

Fri 5/15

3:28 pm-8:30 am

1 stop18h 02m

$685

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Fri 4/17

6:00 am-2:02 pm

1 stop7h 02m

Castries Hewanorra

Mon 4/20

3:22 pm-8:30 am

1 stop18h 08m

$688

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 3/2

5:14 am-2:48 pm

1 stop7h 34m

Castries Hewanorra

Mon 3/9

3:18 pm-9:40 am

1 stop19h 22m

$702

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Wed 3/18

5:15 am-2:58 pm

1 stop8h 43m

Castries Hewanorra

Wed 3/25

3:58 pm-12:43 pm

2 stops21h 45m

$707

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sat 4/25

6:53 pm-1:35 pm

2 stops17h 42m

Castries Hewanorra

Sat 5/2

2:35 pm-8:30 am

2 stops18h 55m

$710

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Mon 3/2

4:05 pm-3:35 pm

2 stops21h 30m

Castries George F. L. Charle

Mon 3/9

7:10 pm-3:29 pm

2 stops45h 19m

$3,683

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Sat 7/18

8:55 am-2:35 pm

2 stops28h 40m

Castries George F. L. Charle

Fri 7/24

6:00 pm-8:02 pm

3 stops27h 02m

$3,970

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Showing 1-10 of 21 results
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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 February 3, 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.

Entertainment

7.8

Boarding

8.1

Overall

7.9

Food

7.2

Crew

8.5

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.

Entertainment

7.8

Boarding

8.1

Overall

7.9

Food

7.2

Crew

8.5

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.

Entertainment

7.8

Boarding

8.1

Overall

7.9

Food

7.2

Crew

8.5

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 02m. Your travel time can differ by up to 15h 21m. 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 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

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Alternative routes for St. Louis to Saint Lucia

See prices for flight routes from nearby airports that may be better suited for you.

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 February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$532Average$807FlexibilityNo cancel feeOn-time71%
DeltaCheapest$575Average$759FlexibilityNo cancel feeOn-timeN/A

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