$394+ 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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
STL — UVF
Oct 5 — Oct 121
Round-trip
1 adult, Economy
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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
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to Saint LuciaExplore 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 5, 2026.
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 5, 2026.
This Air Canada deal was found by Cheapflights users on 9/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/294:05 pm -
1 stop22h 35m
Fri 11/65:40 pm -
1 stop23h 46m
Deal found 9/1![Air Canada logo]()
$553
This American Airlines deal was found by Cheapflights users on 9/5. 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 10/305:00 am -
1 stop7h 42m
Fri 11/62:32 pm -
1 stop9h 15m
Deal found 9/5![American Airlines logo]()
$706
This American Airlines deal was found by Cheapflights users on 9/3. 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 11/236:15 pm -
1 stop17h 14m
Fri 12/42:32 pm -
1 stop9h 15m
Deal found 9/3![American Airlines logo]()
$720
This American Airlines deal was found by Cheapflights users on 9/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:00 am -
1 stop7h 42m
Sun 10/113:20 pm -
1 stop18h 17m
Deal found 9/4![American Airlines logo]()
$747
Best flights from St. Louis to Saint LuciaDiscover carefully curated flight deals from St. Louis to Saint Lucia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 5, 2026.
Discover carefully curated flight deals from St. Louis to Saint Lucia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 5, 2026.
This Air Canada deal was found by Cheapflights users on 9/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/294:05 pm -
1 stop22h 35m
Fri 11/65:40 pm -
1 stop23h 46m
Deal found 9/1![Air Canada logo]()
$553
This American Airlines deal was found by Cheapflights users on 9/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/305:00 am -
1 stop7h 42m
Fri 11/62:32 pm -
1 stop9h 15m
Deal found 9/4![American Airlines logo]()
$706
This Delta deal was found by Cheapflights users on 9/3. 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.
Thu 1/76:00 am -
1 stop7h 05m
Tue 1/124:25 pm -
1 stop9h 14m
Deal found 9/3![Delta logo]()
$765
This American Airlines deal was found by Cheapflights users on 9/5. 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 10/297:10 pm -
2 stops18h 10m
Fri 11/64:41 pm -
2 stops18h 49m
Deal found 9/5![American Airlines logo]()
$711
This American Airlines deal was found by Cheapflights users on 9/3. 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 12/76:15 pm -
1 stop17h 17m
Sat 12/124:18 pm -
1 stop18h 03m
Deal found 9/3![American Airlines logo]()
$765
Last-minute flights from St. Louis to Saint LuciaDiscover last-minute flight deals from St. Louis to Saint Lucia. Data last updated September 5, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Saint Lucia. Data last updated September 5, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:00 am -
1 stop7h 42m
Sun 10/113:20 pm -
1 stop18h 17m
Deal found 9/4![American Airlines logo]()
$747
This American Airlines deal was found by Cheapflights users on 9/2. 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 10/175:40 pm -
2 stops19h 40m
Wed 10/214:04 pm -
2 stops21h 05m
Deal found 9/2![American Airlines logo]()
$795
This American Airlines deal was found by Cheapflights users on 9/3. 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 10/185:00 am -
1 stop8h 20m
Sun 10/253:20 pm -
1 stop18h 17m
Deal found 9/3![American Airlines logo]()
$800
This Air Canada deal was found by Cheapflights users on 9/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/294:05 pm -
1 stop22h 35m
Fri 11/65:40 pm -
1 stop23h 46m
Deal found 9/1![Air Canada logo]()
$553
This American Airlines deal was found by Cheapflights users on 9/5. 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 10/305:00 am -
1 stop7h 42m
Fri 11/62:32 pm -
1 stop9h 15m
Deal found 9/5![American Airlines logo]()
$706
One-way flights from St. Louis to Saint LuciaSearch for one-way flight options from St. Louis to Saint Lucia. Find affordable one-way fares based on user searches. Data last updated September 5, 2026.
Search for one-way flight options from St. Louis to Saint Lucia. Find affordable one-way fares based on user searches. Data last updated September 5, 2026.
This American Airlines deal was found by Cheapflights users on 9/2. 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 10/175:23 pm -
2 stops19h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![American Airlines logo]()
$394
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:00 am -
3 stops29h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![WestJet logo]()
$782
Find 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 5, 2026.
Round-trip from | $553 (Air Canada) |
|---|---|
One-way from | $394 (American Airlines) |
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 7,457,451 searches. Data last updated September 5, 2026.
Use the filters below to find and compare flights from St. Louis to Saint Lucia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Sat 10/17
5:23 pm-2:20 pm
2 stops19h 57m
Castries Hewanorra
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$394
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Thu 10/29
4:05 pm-3:40 pm
1 stop22h 35m
Castries Hewanorra
Fri 11/6
5:40 pm-3:26 pm
1 stop23h 46m
$553
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Fri 10/30
5:00 am-1:42 pm
1 stop7h 42m
Castries Hewanorra
Fri 11/6
2:32 pm-9:47 pm
1 stop9h 15m
$706
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Thu 10/29
7:10 pm-2:20 pm
2 stops18h 10m
Castries Hewanorra
Fri 11/6
4:41 pm-9:30 am
2 stops18h 49m
$711
Quickest round-trip
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Thu 1/7
6:00 am-3:05 pm
1 stop7h 05m
Castries Hewanorra
Tue 1/12
4:25 pm-11:39 pm
1 stop9h 14m
$765
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Mon 12/7
6:15 pm-1:32 pm
1 stop17h 17m
Castries Hewanorra
Sat 12/12
4:18 pm-8:21 am
1 stop18h 03m
$765
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Sat 10/17
7:00 am-1:40 pm
3 stops29h 40m
Castries Hewanorra
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$782
Sorted by cheapest first
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.
STL-UVF
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
STL-LC0
STL-UVF
What is the cheapest month to book a flight from St. Louis to Saint Lucia?
Currently, July is the cheapest month in which you can book a flight from St. Louis to Saint Lucia (average of $573). Flying from St. Louis to Saint Lucia in December is currently the most expensive (average of $1,275). 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 5, 2026.
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.
Overall
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Food
7.2
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Overall
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Food
7.2
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Overall
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Food
7.2
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
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.
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Alternative routes for St. Louis to Saint Lucia
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Complete your trip
Complete your trip to Saint Lucia by adding a car rental and/or hotel reservation to your travel itinerary.
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St. Louis and Saint Lucia flights
Browse other St. Louis and Saint Lucia flight options. Last updated on September 5, 2026.
Popular flight searches
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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 7,457,451 searches. Data last updated September 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$620 | Average$801 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$654 | Average$830 | FlexibilityNo cancel fee | On-time71% |