$675+ 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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
STL — UVF
Nov 19 — Nov 261
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
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Best
Last-minute
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 October 20, 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 October 20, 2026.
This Air Canada deal was found by Cheapflights users on 10/19. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/34:05 pm -
1 stop22h 35m
Thu 12/105:35 pm -
1 stop23h 51m
Deal found 10/19![Air Canada logo]()
$678
This Delta deal was found by Cheapflights users on 10/19. 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.
Mon 11/236:00 am -
1 stop7h 05m
Fri 12/44:26 pm -
1 stop9h 39m
Deal found 10/19![Delta logo]()
$711
This American Airlines deal was found by Cheapflights users on 10/18. 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 11/178:15 pm -
2 stops17h 26m
Tue 11/244:28 pm -
1 stop9h 30m
Deal found 10/18![American Airlines logo]()
$715
This Air Canada deal was found by Cheapflights users on 10/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/254:05 pm -
1 stop22h 35m
Mon 11/305:35 pm -
1 stop23h 51m
Deal found 10/15![Air Canada logo]()
$723
This American Airlines deal was found by Cheapflights users on 10/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:24 pm -
2 stops17h 15m
Thu 12/104:24 pm -
2 stops19h 11m
Deal found 10/19![American Airlines logo]()
$751
This American Airlines deal was found by Cheapflights users on 10/15. 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.
Sun 11/295:00 am -
1 stop7h 56m
Sun 12/62:32 pm -
1 stop9h 17m
Deal found 10/15![American Airlines logo]()
$752
This American Airlines deal was found by Cheapflights users on 10/16. 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 11/235:29 pm -
2 stops18h 00m
Fri 12/42:32 pm -
2 stops11h 27m
Deal found 10/16![American Airlines logo]()
$765
This Delta deal was found by Cheapflights users on 10/17. 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.
Wed 12/306:00 am -
1 stop7h 36m
Wed 1/64:25 pm -
1 stop9h 14m
Deal found 10/17![Delta logo]()
$873
This American Airlines deal was found by Cheapflights users on 10/17. 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 12/305:03 am -
1 stop7h 44m
Wed 1/63:46 pm -
2 stops21h 18m
Deal found 10/17![American Airlines logo]()
$878
This Mytrip deal was found by Cheapflights users on 10/15. 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.
Wed 11/256:35 pm -
3 stops44h 05m
Mon 11/305:35 pm -
1 stop23h 51m
Deal found 10/15![Multiple Airlines logo]()
$882
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 October 20, 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 October 20, 2026.
This American Airlines deal was found by Cheapflights users on 10/18. 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 1/243:45 pm -
2 stops21h 01m
Thu 1/283:46 pm -
1 stop8h 56m
Deal found 10/18![American Airlines logo]()
$675
This Air Canada deal was found by Cheapflights users on 10/19. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/34:05 pm -
1 stop22h 35m
Thu 12/105:35 pm -
1 stop23h 51m
Deal found 10/19![Air Canada logo]()
$678
This Delta deal was found by Cheapflights users on 10/19. 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.
Mon 11/236:00 am -
1 stop7h 05m
Fri 12/44:26 pm -
1 stop9h 39m
Deal found 10/19![Delta logo]()
$711
This American Airlines deal was found by Cheapflights users on 10/18. 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 11/175:00 pm -
2 stops20h 04m
Tue 11/243:56 pm -
2 stops18h 17m
Deal found 10/18![American Airlines logo]()
$715
This Air Canada deal was found by Cheapflights users on 10/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/254:05 pm -
1 stop22h 35m
Mon 11/305:35 pm -
1 stop23h 51m
Deal found 10/15![Air Canada logo]()
$723
This American Airlines deal was found by Cheapflights users on 10/20. 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 1/225:00 am -
1 stop7h 46m
Tue 1/263:46 pm -
1 stop8h 56m
Deal found 10/20![American Airlines logo]()
$747
This American Airlines deal was found by Cheapflights users on 10/15. 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.
Thu 1/76:00 pm -
2 stops19h 38m
Tue 1/123:46 pm -
2 stops20h 44m
Deal found 10/15![American Airlines logo]()
$751
Last-minute flights from St. Louis to Saint LuciaDiscover last-minute flight deals from St. Louis to Saint Lucia. Data last updated October 20, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Saint Lucia. Data last updated October 20, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 10/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/225:08 pm -
2 stops19h 34m
Mon 10/264:04 pm -
2 stops21h 31m
Deal found 10/19![American Airlines logo]()
$995
This American Airlines deal was found by Cheapflights users on 10/18. 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 11/175:00 pm -
2 stops20h 04m
Tue 11/243:56 pm -
2 stops18h 17m
Deal found 10/18![American Airlines logo]()
$715
This Delta deal was found by Cheapflights users on 10/19. 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.
Mon 11/236:00 am -
1 stop7h 05m
Fri 12/44:26 pm -
1 stop9h 39m
Deal found 10/19![Delta logo]()
$711
This American Airlines deal was found by Cheapflights users on 10/16. 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 11/235:29 pm -
2 stops18h 00m
Fri 12/42:32 pm -
2 stops11h 27m
Deal found 10/16![American Airlines logo]()
$765
This Air Canada deal was found by Cheapflights users on 10/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/254:05 pm -
1 stop22h 35m
Mon 11/305:35 pm -
1 stop23h 51m
Deal found 10/15![Air Canada logo]()
$723
This Mytrip deal was found by Cheapflights users on 10/15. 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.
Wed 11/256:35 pm -
3 stops44h 05m
Mon 11/305:35 pm -
1 stop23h 51m
Deal found 10/15![Multiple Airlines logo]()
$882
This American Airlines deal was found by Cheapflights users on 10/15. 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.
Wed 11/255:00 am -
1 stop7h 56m
Mon 11/303:56 pm -
2 stops20h 12m
Deal found 10/15![American Airlines logo]()
$985
This American Airlines deal was found by Cheapflights users on 10/15. 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.
Sun 11/295:00 am -
1 stop7h 56m
Sun 12/62:32 pm -
1 stop9h 17m
Deal found 10/15![American Airlines logo]()
$752
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 October 20, 2026.
Round-trip from | $671 (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 October 20, 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
Sun 1/24
3:45 pm-2:46 pm
2 stops21h 01m
Castries Hewanorra
Thu 1/28
3:46 pm-10:42 pm
1 stop8h 56m
$675
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Thu 12/3
4:05 pm-4:40 pm
1 stop22h 35m
Castries Hewanorra
Thu 12/10
5:35 pm-3:26 pm
1 stop23h 51m
$678
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Mon 11/23
6:00 am-3:05 pm
1 stop7h 05m
Castries Hewanorra
Fri 12/4
4:26 pm-12:05 am
1 stop9h 39m
$711
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Tue 11/17
5:00 pm-3:04 pm
2 stops20h 04m
Castries Hewanorra
Tue 11/24
3:56 pm-8:13 am
2 stops18h 17m
$715
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Wed 11/25
4:05 pm-4:40 pm
1 stop22h 35m
Castries Hewanorra
Mon 11/30
5:35 pm-3:26 pm
1 stop23h 51m
$723
Quickest round-trip
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Fri 1/22
5:00 am-2:46 pm
1 stop7h 46m
Castries Hewanorra
Tue 1/26
3:46 pm-10:42 pm
1 stop8h 56m
$747
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Thu 1/7
6:00 pm-3:38 pm
2 stops19h 38m
Castries Hewanorra
Tue 1/12
3:46 pm-10:30 am
2 stops20h 44m
$751
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 October 20, 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.
Crew
8.5
Boarding
8.1
Entertainment
7.8
Overall
7.8
Comfort
7.8
Food
7.2
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Crew
8.5
Boarding
8.1
Entertainment
7.8
Overall
7.8
Comfort
7.8
Food
7.2
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Crew
8.5
Boarding
8.1
Entertainment
7.8
Overall
7.8
Comfort
7.8
Food
7.2
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - 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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Toggle through the tabs below to find thousands of 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.
Complete your trip
Complete your trip to Saint Lucia by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Saint Lucia by cabin class
Find flights from St. Louis to Saint Lucia, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Saint Lucia flights
Browse other St. Louis and Saint Lucia flight options. Last updated on October 20, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 October 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$620 | Average$844 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$713 | Average$831 | FlexibilityNo cancel fee | On-time71% |