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Saint Lucia

$600+ 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 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — UVF
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
1 adult, Economy
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Cheap 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 October 23, 2025.

Round-trip from

$600
(American Airlines)

Popular in

June

Cheapest in

August

Average price

$712
From Lambert-St Louis to Saint Lucia
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($125 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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Find 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 October 23, 2025.

This Delta deal was found by Cheapflights users on 10/22. 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 11/256:00 amSTL - UVF
1 stop7h 39mDelta
Tue 12/24:56 pmUVF - STL
1 stop17h 28mDelta
Deal found 10/22$617
This American Airlines deal was found by Cheapflights users on 10/22. 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 12/76:53 pmSTL - UVF
2 stops16h 26mAmerican Airlines
Sun 12/144:53 pmUVF - STL
2 stops19h 43mAmerican Airlines
Deal found 10/22$631
This American Airlines deal was found by Cheapflights users on 10/23. 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 11/255:15 amSTL - UVF
1 stop8h 37mAmerican Airlines
Tue 12/24:52 pmUVF - STL
2 stops19h 44mAmerican Airlines
Deal found 10/23$672
This American Airlines deal was found by Cheapflights users on 10/23. 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 11/256:45 pmSTL - UVF
1 stop18h 15mAmerican Airlines
Mon 12/14:04 pmUVF - STL
1 stop27h 01mAmerican Airlines
Deal found 10/23$742
This American Airlines deal was found by Cheapflights users on 10/21. 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.
Mon 12/226:00 pmSTL - UVF
1 stop17h 04mAmerican Airlines
Tue 12/303:53 pmUVF - STL
1 stop18h 42mAmerican Airlines
Deal found 10/21$956
This American Airlines deal was found by Cheapflights users on 10/22. 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 10/235:30 amSTL - UVF
1 stop7h 10mAmerican Airlines
Thu 10/302:56 pmUVF - STL
1 stop10h 00mAmerican Airlines
Deal found 10/22$966
This Mytrip deal was found by Cheapflights users on 10/22. 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 11/2612:31 pmSTL - SLU
3 stops22h 39mMultiple Airlines
Sun 11/3012:10 pmSLU - STL
3 stops29h 19mMultiple Airlines
Deal found 10/22$1,636

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 October 23, 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

Wed 1/21

6:09 pm-1:47 pm

1 stop17h 38m

Castries Hewanorra

Fri 1/30

5:02 pm-9:08 am

1 stop18h 06m

$600

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sat 1/31

5:04 pm-1:47 pm

2 stops18h 43m

Castries Hewanorra

Sat 2/7

5:02 pm-9:24 am

2 stops18h 22m

$605

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Wed 2/18

5:24 am-2:15 pm

1 stop6h 51m

Castries Hewanorra

Mon 2/23

4:45 pm-10:29 am

1 stop19h 44m

$612

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Tue 11/25

6:00 am-3:39 pm

1 stop7h 39m

Castries Hewanorra

Tue 12/2

4:56 pm-8:24 am

1 stop17h 28m

$617

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 2/16

6:16 pm-3:45 pm

2 stops19h 29m

Castries Hewanorra

Mon 2/23

5:00 pm-10:29 am

2 stops19h 29m

$659

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Wed 11/26

12:31 pm-1:10 pm

3 stops22h 39m

Castries George F. L. Charle

Sun 11/30

12:10 pm-3:29 pm

3 stops29h 19m

$1,636

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

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 October 23, 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
7,982 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,982 reviews
Delta
7.9
Good
7,982 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,032 reviews
Delta
7.9
Good
7,982 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 17h 38m. 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 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

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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.
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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 October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$565Average$777FlexibilityNo cancel feeOn-time71%
DeltaCheapest$565Average$759FlexibilityNo cancel feeOn-timeN/A

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