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Saint Lucia

$575+ 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 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
STL — UVF
Oct 22 — Oct 291
Wed 10/22
Wed 10/29
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 September 22, 2025.

Round-trip from

$575
(Delta)

Popular in

April

Cheapest in

August
From Lambert-St Louis to Saint Lucia
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($206 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals

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 22, 2025.

This Delta deal was found by Cheapflights users on 9/22. 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 12/24:59 pmUVF - STL
1 stop17h 26mDelta
Deal found 9/22$575
This Delta deal was found by Cheapflights users on 9/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/146:00 amSTL - UVF
1 stop7h 39mDelta
Fri 11/214:59 pmUVF - STL
1 stop8h 45mDelta
Deal found 9/20$600
This American Airlines deal was found by Cheapflights users on 9/20. 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.
Fri 11/145:56 pmSTL - UVF
2 stops19h 56mAmerican Airlines
Fri 11/214:52 pmUVF - STL
2 stops18h 06mAmerican Airlines
Deal found 9/20$605
This American Airlines deal was found by Cheapflights users on 9/21. 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 11/66:45 pmSTL - UVF
1 stop18h 19mAmerican Airlines
Thu 11/134:04 pmUVF - STL
1 stop10h 01mAmerican Airlines
Deal found 9/21$621
This American Airlines deal was found by Cheapflights users on 9/20. 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 11/254:46 pmSTL - UVF
2 stops20h 14mAmerican Airlines
Tue 12/24:05 pmUVF - STL
1 stop9h 02mAmerican Airlines
Deal found 9/20$630
This American Airlines deal was found by Cheapflights users on 9/22. 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.
Tue 12/25:15 amSTL - UVF
1 stop8h 37mAmerican Airlines
Mon 12/82:23 pmUVF - STL
2 stops21h 00mAmerican Airlines
Deal found 9/22$665
This American Airlines deal was found by Cheapflights users on 9/22. 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 11/66:45 pmSTL - UVF
2 stops16h 34mAmerican Airlines
Mon 11/104:05 pmUVF - STL
2 stops18h 50mAmerican Airlines
Deal found 9/22$669
This Mytrip deal was found by Cheapflights users on 9/22. 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.
Tue 12/212:20 pmSTL - UVF
3 stops26h 05mMultiple Airlines
Mon 12/85:15 pmUVF - STL
1 stop24h 14mMultiple Airlines
Deal found 9/22$721
This American Airlines deal was found by Cheapflights users on 9/20. 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.
Mon 11/105:06 pmSTL - UVF
2 stops20h 46mAmerican Airlines
Fri 11/144:52 pmUVF - STL
2 stops21h 45mAmerican Airlines
Deal found 9/20$876
This Mytrip deal was found by Cheapflights users on 9/20. 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.
Sun 9/214:05 pmSTL - SLU
2 stops25h 55mMultiple Airlines
Sun 9/285:00 amSLU - STL
3 stops32h 28mMultiple Airlines
Deal found 9/20$1,956
This Expedia deal was found by Cheapflights users on 9/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/144:05 pmSTL - SLU
2 stops19h 05mMultiple Airlines
Fri 11/2112:15 pmSLU - STL
2 stops29h 14mMultiple Airlines
Deal found 9/20$3,615
This Expedia deal was found by Cheapflights users on 9/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/94:05 pmSTL - SLU
2 stops15h 25mMultiple Airlines
Sun 12/1412:30 pmSLU - STL
3 stops52h 59mMultiple Airlines
Deal found 9/20$3,641

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 22, 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 11/25

6:00 am-3:39 pm

1 stop7h 39m

Castries Hewanorra

Tue 12/2

4:59 pm-8:25 am

1 stop17h 26m

$575

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sat 2/28

7:01 pm-2:15 pm

1 stop17h 14m

Castries Hewanorra

Wed 3/4

3:35 pm-11:46 pm

1 stop10h 11m

$575

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sat 3/7

6:16 pm-1:30 pm

2 stops17h 14m

Castries Hewanorra

Fri 3/13

2:20 pm-9:52 am

2 stops20h 32m

$592

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Fri 11/14

6:00 am-3:39 pm

1 stop7h 39m

Castries Hewanorra

Fri 11/21

4:59 pm-11:44 pm

1 stop8h 45m

$600

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Fri 11/14

5:56 pm-1:19 pm

2 stops17h 23m

Castries Hewanorra

Fri 11/21

4:04 pm-8:27 am

1 stop18h 23m

$605

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Fri 11/14

4:05 pm-1:10 pm

2 stops19h 05m

Castries George F. L. Charle

Fri 11/21

12:15 pm-3:29 pm

2 stops29h 14m

$3,615

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Tue 12/9

4:05 pm-9:30 am

2 stops15h 25m

Castries George F. L. Charle

Sun 12/14

12:30 pm-3:29 pm

3 stops52h 59m

$3,641

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Sat 2/28

4:05 pm-11:45 am

2 stops17h 40m

Castries George F. L. Charle

Wed 3/4

10:25 am-3:29 pm

2 stops31h 04m

$3,677

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/20

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, 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 22, 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
7,971 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

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
7,971 reviews
Delta
8.0
Very good
7,971 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

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
7,971 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

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 39m. Your travel time can differ by up to 9h 35m. 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

Browse thousands of different options on Cheapflights for your next trip

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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 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$533Average$777FlexibilityNo cancel feeOn-time71%
DeltaCheapest$565Average$775FlexibilityNo cancel feeOn-timeN/A

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