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Saint Lucia

$286+ 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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — UVF
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
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 September 16, 2025.

Round-trip from

$600
(Delta)

One-way from

$286
(Kiwi.com)

Popular in

April

Cheapest in

October
From Lambert-St Louis to Saint Lucia
Search Deals
One-way flight from Lambert-St Louis to Saint Lucia
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($224 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
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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 September 16, 2025.

This Mytrip deal was found by Cheapflights users on 9/14. 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.
Mon 9/154:05 pmSTL - UVF
1 stop21h 10mAir Canada
Tue 9/233:10 pmUVF - STL
1 stop25h 08mAir Canada
Deal found 9/14$396
This Mytrip deal was found by Cheapflights users on 9/14. 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.
Mon 9/151:30 pmSTL - UVF
2 stops23h 45mMultiple Airlines
Tue 9/233:10 pmUVF - STL
3 stops26h 25mMultiple Airlines
Deal found 9/14$584
This American Airlines deal was found by Cheapflights users on 9/14. 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 9/14$625
This American Airlines deal was found by Cheapflights users on 9/14. 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 10/294:45 pmSTL - UVF
2 stops19h 20mAmerican Airlines
Wed 11/54:52 pmUVF - STL
2 stops21h 45mAmerican Airlines
Deal found 9/14$626
This American Airlines deal was found by Cheapflights users on 9/14. 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 10/265:30 amSTL - UVF
1 stop7h 10mAmerican Airlines
Sun 11/24:04 pmUVF - STL
1 stop10h 01mAmerican Airlines
Deal found 9/14$647
This American Airlines deal was found by Cheapflights users on 9/15. 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 12/305:00 amSTL - UVF
1 stop7h 52mAmerican Airlines
Mon 1/53:53 pmUVF - STL
1 stop10h 02mAmerican Airlines
Deal found 9/15$700
This Mytrip deal was found by Cheapflights users on 9/15. 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 12/1412:20 pmSTL - SLU
3 stops28h 40mMultiple Airlines
Sat 12/209:10 amSLU - STL
3 stops32h 19mMultiple Airlines
Deal found 9/15$1,438
This Mytrip deal was found by Cheapflights users on 9/15. 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 12/1412:20 pmSTL - SLU
3 stops28h 40mMultiple Airlines
Sun 12/2112:10 pmSLU - STL
3 stops29h 19mMultiple Airlines
Deal found 9/15$1,452
This Mytrip deal was found by Cheapflights users on 9/15. 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.
Fri 12/124:05 pmSTL - SLU
2 stops19h 05mMultiple Airlines
Sat 12/2012:35 pmSLU - STL
3 stops28h 54mMultiple Airlines
Deal found 9/15$2,267
This Orbitz deal was found by Cheapflights users on 9/15. 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 9/279:15 amSTL - SLU
3 stops25h 30mMultiple Airlines
Thu 10/26:20 pmSLU - STL
2 stops45h 58mMultiple Airlines
Deal found 9/15$3,665
This Travelocity deal was found by Cheapflights users on 9/15. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/304:05 pmSTL - SLU
2 stops15h 25mMultiple Airlines
Mon 1/54:35 pmSLU - STL
2 stops48h 54mMultiple Airlines
Deal found 9/15$3,668

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 September 16, 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

Thu 2/5

6:00 am-3:04 pm

1 stop7h 04m

Castries Hewanorra

Tue 2/10

4:24 pm-11:40 pm

1 stop9h 16m

$600

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Thu 2/5

5:02 pm-2:25 pm

2 stops19h 23m

Castries Hewanorra

Tue 2/10

3:35 pm-8:14 am

2 stops18h 39m

$605

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 2/16

5:24 am-2:15 pm

1 stop6h 51m

Castries Hewanorra

Mon 2/23

5:00 pm-8:06 am

1 stop17h 06m

$612

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Wed 2/18

5:19 am-2:35 pm

1 stop7h 16m

Castries Hewanorra

Mon 2/23

5:00 pm-8:06 am

1 stop17h 06m

$612

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Sun 12/14

12:20 pm-7:00 pm

3 stops28h 40m

Castries George F. L. Charle

Sat 12/20

9:10 am-3:29 pm

3 stops32h 19m

$1,438

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Sun 12/14

12:20 pm-7:00 pm

3 stops28h 40m

Castries George F. L. Charle

Sun 12/21

12:10 pm-3:29 pm

3 stops29h 19m

$1,452

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Fri 12/12

4:05 pm-1:10 pm

2 stops19h 05m

Castries George F. L. Charle

Sat 12/20

12:35 pm-3:29 pm

3 stops28h 54m

$2,267

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Sat 9/27

4:05 pm-3:50 pm

2 stops46h 45m

Castries George F. L. Charle

Thu 10/2

6:20 pm-3:18 pm

2 stops45h 58m

$3,665

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Tue 12/30

4:05 pm-9:30 am

2 stops15h 25m

Castries George F. L. Charle

Mon 1/5

4:35 pm-3:29 pm

2 stops48h 54m

$3,668

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 11/10

2:12 pm-2:50 pm

2 stops22h 38m

$286

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 11 results
1
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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, January is the cheapest month in which you can book a flight from St. Louis to Saint Lucia (average of $556). Flying from St. Louis to Saint Lucia in December is currently the most expensive (average of $730). 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 September 16, 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
8.0
Very good
7,954 reviews

Overall

8.0

Crew

8.5

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Overall

8.0

Crew

8.5

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,954 reviews

Overall

8.0

Crew

8.5

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 04m. Your travel time can differ by up to 12h 19m. 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, January is the cheapest month in which you can book a flight from St. Louis to Saint Lucia (average of $556). Flying from St. Louis to Saint Lucia in December is currently the most expensive (average of $730). 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$533Average$777FlexibilityNo cancel feeOn-time71%
DeltaCheapest$565Average$775FlexibilityNo cancel feeOn-timeN/A

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