$642+ 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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.
STL — UVF
Aug 6 — Aug 131
Round-trip
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
Cheapest
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 July 7, 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 July 7, 2026.
This Air Canada deal was found by Cheapflights users on 7/5. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/242:40 pm
STL
- UVF
1 stop22h 40m
Air Canada
Fri 8/283:15 pm
UVF
- STL
1 stop23h 49m
Air Canada
Deal found 7/5![Air Canada logo]()
$642
This Air Canada deal was found by Cheapflights users on 7/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/102:40 pm
STL
- UVF
1 stop22h 40m
Air Canada
Tue 8/183:15 pm
UVF
- STL
1 stop23h 47m
Air Canada
Deal found 7/2![Air Canada logo]()
$654
This Delta deal was found by Cheapflights users on 7/3. 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.
Mon 11/236:00 am
STL
- UVF
1 stop7h 10m
Delta
Fri 12/44:25 pm
UVF
- STL
1 stop9h 14m
Delta
Deal found 7/3![Delta logo]()
$710
This American Airlines deal was found by Cheapflights users on 7/2. 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.
Fri 10/305:00 am
STL
- UVF
1 stop9h 03m
American Airlines
Fri 11/64:04 pm
UVF
- STL
1 stop10h 01m
American Airlines
Deal found 7/2![American Airlines logo]()
$745
This American Airlines deal was found by Cheapflights users on 7/5. 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.
Mon 11/26:45 pm
STL
- UVF
2 stops16h 36m
American Airlines
Sun 11/84:50 pm
UVF
- STL
2 stops20h 01m
American Airlines
Deal found 7/5![American Airlines logo]()
$755
This Mytrip deal was found by Cheapflights users on 7/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2412:10 pm
STL
- SLU
3 stops19h 00m
Multiple Airlines
Fri 8/2812:35 pm
SLU
- STL
3 stops31h 07m
Multiple Airlines
Deal found 7/2![Multiple Airlines logo]()
$1,703
This Mytrip deal was found by Cheapflights users on 7/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/24:05 pm
STL
- SLU
2 stops14h 05m
Multiple Airlines
Sun 11/86:55 pm
SLU
- STL
3 stops30h 14m
Multiple Airlines
Deal found 7/5![Multiple Airlines logo]()
$1,974
This Orbitz deal was found by Cheapflights users on 7/3. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/274:05 pm
STL
- SLU
2 stops24h 55m
Multiple Airlines
Fri 12/46:00 pm
SLU
- STL
3 stops47h 26m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$2,620
This Orbitz deal was found by Cheapflights users on 7/4. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:55 am
STL
- SLU
3 stops28h 40m
Multiple Airlines
Mon 9/2812:35 pm
SLU
- STL
2 stops26h 25m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$3,124
This Gotogate deal was found by Cheapflights users on 7/3. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/174:05 pm
STL
- SLU
2 stops20h 30m
Multiple Airlines
Fri 12/186:00 pm
SLU
- STL
2 stops23h 26m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$3,174
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 July 7, 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 July 7, 2026.
This Orbitz deal was found by Cheapflights users on 7/5. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/134:05 pm
STL
- UVF
1 stop22h 35m
Air Canada
Fri 12/185:40 pm
UVF
- STL
1 stop23h 46m
Air Canada
Deal found 7/5![Air Canada logo]()
$672
This American Airlines deal was found by Cheapflights users on 7/4. 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.
Mon 12/76:53 pm
STL
- UVF
2 stops16h 26m
American Airlines
Sat 12/124:53 pm
UVF
- STL
2 stops19h 24m
American Airlines
Deal found 7/4![American Airlines logo]()
$750
This Delta deal was found by Cheapflights users on 7/6. 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 10/26:00 am
STL
- UVF
1 stop7h 12m
Delta
Mon 10/123:41 pm
UVF
- STL
1 stop9h 07m
Delta
Deal found 7/6![Delta logo]()
$780
This American Airlines deal was found by Cheapflights users on 7/4. 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 9/245:13 pm
STL
- UVF
2 stops19h 41m
American Airlines
Mon 9/283:02 pm
UVF
- STL
2 stops20h 18m
American Airlines
Deal found 7/4![American Airlines logo]()
$785
This Mytrip deal was found by Cheapflights users on 7/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2412:10 pm
STL
- SLU
3 stops19h 00m
Multiple Airlines
Fri 8/2812:35 pm
SLU
- STL
3 stops31h 07m
Multiple Airlines
Deal found 7/2![Multiple Airlines logo]()
$1,703
This Mytrip deal was found by Cheapflights users on 7/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/24:05 pm
STL
- SLU
2 stops14h 05m
Multiple Airlines
Sun 11/86:55 pm
SLU
- STL
3 stops30h 14m
Multiple Airlines
Deal found 7/5![Multiple Airlines logo]()
$1,974
This Orbitz deal was found by Cheapflights users on 7/3. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/274:05 pm
STL
- SLU
2 stops24h 55m
Multiple Airlines
Fri 12/46:00 pm
SLU
- STL
3 stops47h 26m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$2,620
This Orbitz deal was found by Cheapflights users on 7/4. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:55 am
STL
- SLU
3 stops28h 40m
Multiple Airlines
Mon 9/2812:35 pm
SLU
- STL
2 stops26h 25m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$3,124
This Gotogate deal was found by Cheapflights users on 7/3. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/174:05 pm
STL
- SLU
2 stops20h 30m
Multiple Airlines
Fri 12/186:00 pm
SLU
- STL
2 stops23h 26m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$3,174
Last-minute flights from St. Louis to Saint LuciaDiscover last-minute flight deals from St. Louis to Saint Lucia. Data last updated July 7, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Saint Lucia. Data last updated July 7, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 7/2. 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 8/16:19 pm
STL
- UVF
1 stop18h 31m
American Airlines
Thu 8/63:19 pm
UVF
- STL
1 stop8h 21m
American Airlines
Deal found 7/2![American Airlines logo]()
$768
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/95:00 am
STL
- UVF
1 stop7h 49m
American Airlines
Thu 8/133:19 pm
UVF
- STL
1 stop8h 21m
American Airlines
Deal found 7/1![American Airlines logo]()
$770
This Air Canada deal was found by Cheapflights users on 7/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/102:40 pm
STL
- UVF
1 stop22h 40m
Air Canada
Tue 8/183:15 pm
UVF
- STL
1 stop23h 47m
Air Canada
Deal found 7/2![Air Canada logo]()
$654
This Air Canada deal was found by Cheapflights users on 7/5. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/242:40 pm
STL
- UVF
1 stop22h 40m
Air Canada
Fri 8/283:15 pm
UVF
- STL
1 stop23h 49m
Air Canada
Deal found 7/5![Air Canada logo]()
$642
This Mytrip deal was found by Cheapflights users on 7/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2412:10 pm
STL
- SLU
3 stops19h 00m
Multiple Airlines
Fri 8/2812:35 pm
SLU
- STL
3 stops31h 07m
Multiple Airlines
Deal found 7/2![Multiple Airlines logo]()
$1,703
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 July 7, 2026.
Round-trip from | $642 (Air Canada) |
|---|
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 7, 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 - UVF
STLUVF
Lambert-St Louis
Sun 12/13
4:05 pm-4:40 pm
1 stop22h 35m
Castries Hewanorra
Fri 12/18
5:40 pm-3:26 pm
1 stop23h 46m
$672
St. LouisCastries
STL - UVF
STLUVF
Lambert-St Louis
Mon 12/7
6:53 pm-1:19 pm
2 stops16h 26m
Castries Hewanorra
Sat 12/12
4:53 pm-10:17 am
2 stops19h 24m
$750
Quickest round-trip
St. LouisCastries
STL - UVF
STLUVF
Lambert-St Louis
Fri 10/2
6:00 am-2:12 pm
1 stop7h 12m
Castries Hewanorra
Mon 10/12
3:41 pm-11:48 pm
1 stop9h 07m
$780
St. LouisCastries
STL - UVF
STLUVF
Lambert-St Louis
Thu 9/24
5:13 pm-1:54 pm
2 stops19h 41m
Castries Hewanorra
Mon 9/28
3:02 pm-10:20 am
2 stops20h 18m
$785
St. LouisCastries
STL - SLU
STLSLU
Lambert-St Louis
Mon 8/24
12:10 pm-8:10 am
3 stops19h 00m
Castries George F. L. Charle
Fri 8/28
12:35 pm-6:42 pm
3 stops31h 07m
$1,703
St. LouisCastries
STL - SLU
STLSLU
Lambert-St Louis
Mon 11/2
4:05 pm-8:10 am
2 stops14h 05m
Castries George F. L. Charle
Sun 11/8
6:55 pm-11:09 pm
3 stops30h 14m
$1,974
St. LouisCastries
STL - SLU
STLSLU
Lambert-St Louis
Fri 11/27
4:05 pm-7:00 pm
2 stops24h 55m
Castries George F. L. Charle
Fri 12/4
6:00 pm-3:26 pm
3 stops47h 26m
$2,620
St. LouisCastries
STL - SLU
STLSLU
Lambert-St Louis
Thu 9/24
8:55 am-2:35 pm
3 stops28h 40m
Castries George F. L. Charle
Mon 9/28
12:35 pm-2:00 pm
2 stops26h 25m
$3,124
St. LouisCastries
STL - SLU
STLSLU
Lambert-St Louis
Thu 12/17
4:05 pm-2:35 pm
2 stops20h 30m
Castries George F. L. Charle
Fri 12/18
6:00 pm-3:26 pm
2 stops23h 26m
$3,174
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
STL-SLU
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
STL-SLU
What is the cheapest month to book a flight from St. Louis to Saint Lucia?
Currently, August is the cheapest month in which you can book a flight from St. Louis to Saint Lucia (average of $505). Flying from St. Louis to Saint Lucia in December is currently the most expensive (average of $819). 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 7, 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
Food
7.2
Crew
8.5
Entertainment
7.8
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Food
7.2
Crew
8.5
Entertainment
7.8
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Food
7.2
Crew
8.5
Entertainment
7.8
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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.
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
Complete your trip
Flights by cabin class
Other flight options
Popular flights
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 July 7, 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 2,558,603 searches. Data last updated July 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$575 | Average$778 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$600 | Average$801 | FlexibilityNo cancel fee | On-timeN/A |