HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Saint Lucia

$570+ 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 4/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — UVF
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Saint Lucia with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 February 20, 2025.

Round-trip from

$570
(American Airlines)

Popular in

December

Cheapest in

August

Average price

$591
From Lambert-St Louis to Saint Lucia
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($228 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
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 February 20, 2025.

This American Airlines deal was found by Cheapflights users on 2/20. 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.
Sat 4/266:00 pmSTL - UVF
2 stops19h 28mAmerican Airlines
Fri 5/22:45 pmUVF - STL
1 stop8h 35mAmerican Airlines
Deal found 2/20$570
This Delta deal was found by Cheapflights users on 2/19. 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.
Sat 3/296:00 amSTL - UVF
1 stop7h 00mDelta
Sat 4/53:25 pmUVF - STL
1 stop9h 05mDelta
Deal found 2/19$651
This Priceline deal was found by Cheapflights users on 2/19. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/63:30 pmSTL - UVF
1 stop22h 15mAir Canada
Sun 4/133:45 pmUVF - STL
2 stops23h 57mAir Canada
Deal found 2/19$775
This Mytrip deal was found by Cheapflights users on 2/19. 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 3/165:15 pmSTL - UVF
3 stops44h 30mMultiple Airlines
Fri 3/213:45 pmUVF - STL
3 stops45h 00mMultiple Airlines
Deal found 2/19$991
This United Airlines deal was found by Cheapflights users on 2/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/285:00 amSTL - UVF
1 stop9h 30mUnited Airlines
Sat 7/512:55 pmUVF - STL
1 stop10h 50mUnited Airlines
Deal found 2/20$1,165
This Mytrip deal was found by Cheapflights users on 2/20. 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.
Tue 6/171:30 pmSTL - SLU
3 stops28h 30mMultiple Airlines
Tue 6/249:25 amSLU - STL
2 stops28h 11mMultiple Airlines
Deal found 2/20$1,504

Find flights from St. Louis to Saint Lucia within your budget

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 February 20, 2025.

Fly from

St. Louis

Fly to

Saint Lucia

Route

Depart

Return

Price

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sat 4/26

6:00 pm-2:28 pm

2 stops19h 28m

Castries Hewanorra

Fri 5/2

3:28 pm-8:30 am

1 stop18h 02m

$570

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sat 3/29

6:00 am-2:00 pm

1 stop7h 00m

Castries Hewanorra

Sat 4/5

3:25 pm-11:30 pm

1 stop9h 05m

$651

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sun 4/6

3:30 pm-2:45 pm

1 stop22h 15m

Castries Hewanorra

Sun 4/13

3:45 pm-2:49 pm

1 stop24h 04m

$711

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sun 3/16

5:15 pm-2:45 pm

3 stops44h 30m

Castries Hewanorra

Fri 3/21

3:45 pm-11:45 am

3 stops45h 00m

$991

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Wed 3/5

1:03 pm-7:00 pm

3 stops27h 57m

Castries George F. L. Charle

Sun 6/15

5:00 am-6:32 pm

2 stops14h 32m

$1,659

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

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.

Travel insights for flights from St. Louis to Saint Lucia

Get recent, data-driven insights about flights from St. Louis to Saint Lucia including ideal travel times, pricing trends, and more.

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.

What is the cheapest time of day to fly from STL to LC?

Find hourly flight availability from St. Louis to Saint Lucia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 20, 2025.

When flying from St. Louis to Saint Lucia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 February 20, 2025.
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,220 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines
7.4
Good
8,766 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air Canada
7.0
Good
8,748 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Saint Lucia

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Luis Munoz Marin Intl flights
St. Louis to Luis Munoz Marin Intl flights
St. Louis to Punta Cana flights
Kansas City to Saint Thomas Island flights
Kansas City to Punta Cana flights
St. Louis to Saint Thomas Island flights
St. Louis to Simpson Bay flights
Kansas City to Montego Bay flights
Kansas City to Oranjestad flights
St. Louis to Montego Bay flights
St. Louis to Oranjestad flights
St. Louis to George Town flights
Kansas City to Nassau flights
Kansas City to Castries flights
St. Louis to Nassau flights
Kansas City to Christiansted flights
St. Louis to Providenciales flights
St. Louis to Willemstad flights
Kansas City to George Town flights
St. Louis to Christiansted flights
Springfield to Luis Munoz Marin Intl flights
Kansas City to Santo Domingo flights
St. Louis to Castries flights
Kansas City to Willemstad flights
Kansas City to Providenciales flights
St. Louis to Marsh Harbour flights
Kansas City to Simpson Bay flights
St. Louis to Puerto Plata flights
St. Louis to Kingston flights
St. Louis to Bridgetown flights
Springfield to Punta Cana flights
Kansas City to Puerto Plata flights
Springfield to Oranjestad flights
Kansas City to Bridgetown flights
Kansas City to St. John's flights
Springfield to Montego Bay flights
Kansas City to Gregory Town flights
St. Louis to St. John's flights
Kansas City to Kingston flights
St. Louis to St. George's flights
St. Louis to Santo Domingo flights
Kansas City to Santiago de los Caballeros flights
St. Louis to Freeport flights
Springfield to Saint Thomas Island flights
St. Louis to Road Town flights
St. Louis to Basseterre flights
St. Louis to Santiago de los Caballeros flights
Springfield to Nassau flights
St. Louis to Kralendijk flights
Kansas City to St. George's flights

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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$444Average$646FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$491Average$708FlexibilityNo cancel feeOn-time71%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.