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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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
STL — UVF
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
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 July 2, 2025.

Round-trip from

$600
(American Airlines)

Popular in

April

Cheapest in

October

Average price

$729
From Lambert-St Louis to Saint Lucia
Search Deals
Highest demand for flights based on searches. 31% potential increase in price ($385 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 2, 2025.

This American Airlines deal was found by Cheapflights users on 6/30. 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 11/175:29 amSTL - UVF
1 stop7h 01mAmerican Airlines
Tue 11/254:35 pmUVF - STL
1 stop8h 26mAmerican Airlines
Deal found 6/30$575
This Mytrip deal was found by Cheapflights users on 6/30. 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.
Thu 8/141:30 pmSTL - UVF
2 stops23h 45mMultiple Airlines
Thu 8/212:35 pmUVF - STL
3 stops27h 10mMultiple Airlines
Deal found 6/30$755
This Mytrip deal was found by Cheapflights users on 7/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/299:15 amSTL - SLU
3 stops32h 45mMultiple Airlines
Tue 8/512:35 pmSLU - STL
3 stops32h 25mMultiple Airlines
Deal found 7/1$2,544

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 July 2, 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

Mon 8/25

4:19 pm-3:00 pm

2 stops21h 41m

Castries Hewanorra

Fri 8/29

3:35 pm-11:59 pm

1 stop9h 24m

$580

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Thu 8/14

1:30 pm-2:15 pm

2 stops23h 45m

Castries Hewanorra

Thu 8/21

2:35 pm-4:45 pm

3 stops27h 10m

$755

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Tue 7/29

9:15 am-7:00 pm

3 stops32h 45m

Castries George F. L. Charle

Tue 8/5

12:35 pm-8:00 pm

3 stops32h 25m

$2,544

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

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 July 2, 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
7,975 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

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
7,975 reviews
Delta
8.0
Very good
7,975 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

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
7,975 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

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.

  • 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 July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$444Average$649FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$492Average$709FlexibilityNo cancel feeOn-time71%

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