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Saint Lucia

$323+ 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 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — UVF
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
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 November 6, 2025.

Round-trip from

$442
(FlightHub)

One-way from

$323
(American Airlines)

Popular in

June

Cheapest in

August

Average price

$1,010
From Lambert-St Louis to Saint Lucia
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One-way flight from Lambert-St Louis to Saint Lucia
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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).
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Average for round-trip flights in November 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 November 6, 2025.

This American Airlines deal was found by Cheapflights users on 11/6. 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.
Tue 11/256:45 pmSTL - UVF
1 stop18h 15mAmerican Airlines
Tue 12/24:05 pmUVF - STL
1 stop9h 02mAmerican Airlines
Deal found 11/6$795
This Air Canada deal was found by Cheapflights users on 11/6. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/234:05 pmSTL - UVF
1 stop22h 20mAir Canada
Mon 12/15:15 pmUVF - STL
1 stop24h 14mAir Canada
Deal found 11/6$848
This American Airlines deal was found by Cheapflights users on 11/6. 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.
Tue 11/257:03 pmSTL - UVF
2 stops17h 57mAmerican Airlines
Mon 12/14:52 pmUVF - STL
2 stops22h 23mAmerican Airlines
Deal found 11/6$871
This American Airlines deal was found by Cheapflights users on 11/6. 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.
Sun 11/236:45 pmSTL - UVF
2 stops19h 07mAmerican Airlines
Mon 12/14:52 pmUVF - STL
2 stops18h 43mAmerican Airlines
Deal found 11/6$921
This American Airlines deal was found by Cheapflights users on 11/6. 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.
Sun 12/216:00 pmSTL - UVF
1 stop19h 53mAmerican Airlines
Sun 12/284:54 pmUVF - STL
2 stops19h 56mAmerican Airlines
Deal found 11/6$1,174
This Mytrip deal was found by Cheapflights users on 11/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2512:31 pmSTL - SLU
3 stops18h 59mMultiple Airlines
Mon 12/112:35 pmSLU - STL
2 stops28h 54mMultiple Airlines
Deal found 11/6$1,456
This Mytrip deal was found by Cheapflights users on 11/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/238:00 amSTL - SLU
3 stops29h 35mMultiple Airlines
Mon 12/112:35 pmSLU - STL
2 stops28h 54mMultiple Airlines
Deal found 11/6$1,524
This United Airlines deal was found by Cheapflights users on 11/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/206:30 amSTL - UVF
1 stop7h 55mUnited Airlines
Sat 12/271:52 pmUVF - STL
1 stop9h 51mUnited Airlines
Deal found 11/4$2,019

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 November 6, 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

Tue 1/6

4:05 pm-4:20 pm

1 stop22h 15m

Castries Hewanorra

Wed 1/14

5:15 pm-3:29 pm

1 stop24h 14m

$442

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sun 3/29

4:05 pm-3:30 pm

1 stop22h 25m

Castries Hewanorra

Fri 4/3

4:20 pm-3:24 pm

1 stop24h 04m

$548

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sat 4/25

7:34 am-1:15 pm

1 stop28h 41m

Castries Hewanorra

Fri 5/1

4:05 pm-8:05 am

1 stop17h 00m

$584

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Fri 4/24

5:29 am-1:15 pm

1 stop6h 46m

Castries Hewanorra

Fri 5/1

4:05 pm-8:05 am

1 stop17h 00m

$600

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Thu 2/19

6:50 pm-3:24 pm

2 stops18h 34m

Castries Hewanorra

Thu 2/26

4:24 pm-9:33 am

2 stops19h 09m

$605

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Wed 1/7

6:02 pm-1:46 pm

1 stop17h 44m

Castries Hewanorra

Wed 1/14

4:06 pm-9:24 am

2 stops19h 18m

$605

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 2/16

4:01 pm-2:50 pm

2 stops20h 49m

Castries Hewanorra

Mon 2/23

5:02 pm-1:16 pm

2 stops22h 14m

$605

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Tue 11/25

12:31 pm-9:30 am

3 stops18h 59m

Castries George F. L. Charle

Mon 12/1

12:35 pm-3:29 pm

2 stops28h 54m

$1,456

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Sun 11/23

8:00 am-3:35 pm

3 stops29h 35m

Castries George F. L. Charle

Mon 12/1

12:35 pm-3:29 pm

2 stops28h 54m

$1,524

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Wed 1/7

6:02 pm-1:46 pm

1 stop17h 44m

$323

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 11 results
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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 November 6, 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
8,001 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

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
8,001 reviews
Delta
7.9
Good
8,001 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

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
11,040 reviews
Delta
7.9
Good
8,001 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

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 American Airlines can get you from St. Louis to Saint Lucia in just under 22h 15m. Your travel time can differ by up to 6h 26m. 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

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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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$565Average$779FlexibilityNo cancel feeOn-time71%
DeltaCheapest$565Average$745FlexibilityNo cancel feeOn-timeN/A

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