$508+ 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 6/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — UVF
Jun 5 — Jun 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
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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 May 6, 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 May 6, 2026.
This Air Canada deal was found by Cheapflights users on 5/2. 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 6/82:15 pm
STL
- UVF
1 stop22h 55m
Air Canada
Fri 6/123:05 pm
UVF
- STL
1 stop22h 01m
Air Canada
Deal found 5/2![Air Canada logo]()
$508
This Air Canada deal was found by Cheapflights users on 5/4. 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 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 5/4![Air Canada logo]()
$604
This Expedia deal was found by Cheapflights users on 5/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2312:10 pm
STL
- UVF
2 stops49h 10m
Air Canada
Fri 8/283:15 pm
UVF
- STL
1 stop23h 47m
Air Canada
Deal found 5/3![Air Canada logo]()
$657
This American Airlines deal was found by Cheapflights users on 5/5. 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.
Tue 9/155:33 am
STL
- UVF
1 stop7h 17m
American Airlines
Tue 9/224:00 pm
UVF
- STL
1 stop8h 12m
American Airlines
Deal found 5/5![American Airlines logo]()
$710
This Gotogate deal was found by Cheapflights users on 5/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/52:15 pm
STL
- SLU
2 stops27h 45m
Multiple Airlines
Sun 6/712:35 pm
SLU
- STL
2 stops24h 41m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$1,015
This Gotogate deal was found by Cheapflights users on 5/3. 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.
Fri 9/188:55 am
STL
- SLU
2 stops33h 05m
Multiple Airlines
Fri 9/2512:35 pm
SLU
- STL
2 stops26h 25m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$1,085
This Gotogate deal was found by Cheapflights users on 5/5. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/122:40 pm
STL
- SLU
2 stops27h 20m
Multiple Airlines
Sat 9/1912:35 pm
SLU
- STL
2 stops26h 25m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$1,086
This Gotogate deal was found by Cheapflights users on 5/5. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:55 am
STL
- SLU
2 stops33h 05m
Multiple Airlines
Sun 8/2312:35 pm
SLU
- STL
2 stops32h 32m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$1,100
This Gotogate deal was found by Cheapflights users on 5/3. 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.
Sat 7/48:55 am
STL
- SLU
2 stops33h 05m
Multiple Airlines
Sat 7/1112:35 pm
SLU
- STL
2 stops26h 27m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$1,109
This Gotogate deal was found by Cheapflights users on 5/5. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/238:55 am
STL
- SLU
2 stops33h 05m
Multiple Airlines
Mon 10/269:10 am
SLU
- STL
2 stops31h 20m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$1,215
This Gotogate deal was found by Cheapflights users on 5/6. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/284:15 pm
STL
- SLU
2 stops24h 45m
Multiple Airlines
Sat 12/512:35 pm
SLU
- STL
2 stops28h 55m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$1,463
This Mytrip deal was found by Cheapflights users on 5/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/32:40 pm
STL
- SLU
2 stops21h 30m
Multiple Airlines
Wed 7/810:15 am
SLU
- STL
2 stops28h 47m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$1,636
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 May 6, 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 May 6, 2026.
This Air Canada deal was found by Cheapflights users on 5/3. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1012:10 pm
STL
- UVF
2 stops25h 10m
Air Canada
Tue 8/183:15 pm
UVF
- STL
1 stop23h 47m
Air Canada
Deal found 5/3![Air Canada logo]()
$608
This American Airlines deal was found by Cheapflights users on 5/1. 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.
Sat 7/42:35 pm
STL
- UVF
2 stops22h 15m
American Airlines
Sat 7/111:10 pm
UVF
- STL
2 stops12h 05m
American Airlines
Deal found 5/1![American Airlines logo]()
$750
This Gotogate deal was found by Cheapflights users on 5/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/52:15 pm
STL
- SLU
2 stops27h 45m
Multiple Airlines
Sun 6/712:35 pm
SLU
- STL
2 stops24h 41m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$1,015
This American Airlines deal was found by Cheapflights users on 5/5. 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 9/145:46 pm
STL
- UVF
2 stops19h 04m
American Airlines
Mon 9/214:00 pm
UVF
- STL
1 stop22h 22m
American Airlines
Deal found 5/5![American Airlines logo]()
$764
This American Airlines deal was found by Cheapflights users on 5/1. 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.
Thu 10/89:38 am
STL
- UVF
1 stop26h 47m
American Airlines
Sun 10/114:20 pm
UVF
- STL
1 stop16h 43m
American Airlines
Deal found 5/1![American Airlines logo]()
$815
This American Airlines deal was found by Cheapflights users on 5/2. 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.
Mon 9/75:00 am
STL
- UVF
1 stop8h 04m
American Airlines
Sat 9/124:00 pm
UVF
- STL
1 stop22h 22m
American Airlines
Deal found 5/2![American Airlines logo]()
$865
This Gotogate deal was found by Cheapflights users on 5/3. 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.
Fri 9/188:55 am
STL
- SLU
2 stops33h 05m
Multiple Airlines
Fri 9/2512:35 pm
SLU
- STL
2 stops26h 25m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$1,085
This Gotogate deal was found by Cheapflights users on 5/5. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:55 am
STL
- SLU
2 stops33h 05m
Multiple Airlines
Sun 8/2312:35 pm
SLU
- STL
2 stops32h 32m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$1,100
This American Airlines deal was found by Cheapflights users on 5/2. 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 10/26:31 pm
STL
- UVF
2 stops18h 19m
American Airlines
Mon 10/124:00 pm
UVF
- STL
2 stops18h 27m
American Airlines
Deal found 5/2![American Airlines logo]()
$968
This Gotogate deal was found by Cheapflights users on 5/5. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/238:55 am
STL
- SLU
2 stops33h 05m
Multiple Airlines
Mon 10/269:10 am
SLU
- STL
2 stops31h 20m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$1,215
This Mytrip deal was found by Cheapflights users on 5/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/48:55 am
STL
- SLU
3 stops26h 10m
Multiple Airlines
Sat 7/1112:35 pm
SLU
- STL
2 stops26h 27m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$1,469
This Mytrip deal was found by Cheapflights users on 5/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/32:40 pm
STL
- SLU
2 stops21h 30m
Multiple Airlines
Wed 7/810:15 am
SLU
- STL
3 stops33h 27m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$1,637
This Travelocity deal was found by Cheapflights users on 5/5. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/28:40 am
STL
- SLU
2 stops33h 20m
Multiple Airlines
Tue 6/97:10 pm
SLU
- STL
2 stops41h 56m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$2,486
Last-minute flights from St. Louis to Saint LuciaDiscover last-minute flight deals from St. Louis to Saint Lucia. Data last updated May 6, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Saint Lucia. Data last updated May 6, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 5/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/216:00 am
STL
- UVF
1 stop7h 05m
Delta
Sat 5/303:25 pm
UVF
- STL
1 stop9h 34m
Delta
Deal found 5/5![Delta logo]()
$984
This United Airlines deal was found by Cheapflights users on 5/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/216:00 am
STL
- UVF
2 stops53h 10m
United Airlines
Sat 5/304:22 pm
UVF
- STL
2 stops24h 24m
United Airlines
Deal found 5/2![United Airlines logo]()
$988
This American Airlines deal was found by Cheapflights users on 5/5. 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.
Tue 6/25:00 pm
STL
- UVF
2 stops20h 16m
American Airlines
Tue 6/93:16 pm
UVF
- STL
2 stops19h 56m
American Airlines
Deal found 5/5![American Airlines logo]()
$876
This Delta deal was found by Cheapflights users on 5/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:00 am
STL
- UVF
1 stop7h 05m
Delta
Tue 6/93:33 pm
UVF
- STL
1 stop9h 23m
Delta
Deal found 5/5![Delta logo]()
$989
This Travelocity deal was found by Cheapflights users on 5/5. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/28:40 am
STL
- SLU
2 stops33h 20m
Multiple Airlines
Tue 6/97:10 pm
SLU
- STL
2 stops41h 56m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$2,486
This Gotogate deal was found by Cheapflights users on 5/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/52:15 pm
STL
- SLU
2 stops27h 45m
Multiple Airlines
Sun 6/712:35 pm
SLU
- STL
2 stops24h 41m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$1,015
This Air Canada deal was found by Cheapflights users on 5/2. 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 6/82:15 pm
STL
- UVF
1 stop22h 55m
Air Canada
Fri 6/123:05 pm
UVF
- STL
1 stop22h 01m
Air Canada
Deal found 5/2![Air Canada logo]()
$508
This American Airlines deal was found by Cheapflights users on 5/3. 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.
Thu 6/185:14 am
STL
- UVF
1 stop8h 02m
American Airlines
Thu 6/253:16 pm
UVF
- STL
1 stop18h 16m
American Airlines
Deal found 5/3![American Airlines logo]()
$928
This American Airlines deal was found by Cheapflights users on 5/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/205:16 am
STL
- UVF
1 stop7h 30m
American Airlines
Sat 6/272:06 pm
UVF
- STL
1 stop10h 53m
American Airlines
Deal found 5/6![American Airlines logo]()
$789
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 May 6, 2026.
Round-trip from | $508 (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 May 6, 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
Mon 8/10
12:10 pm-2:20 pm
2 stops25h 10m
Castries Hewanorra
Tue 8/18
3:15 pm-2:02 pm
1 stop23h 47m
$608
St. LouisCastries
STL - UVF
STLUVF
Lambert-St Louis
Sat 7/4
2:35 pm-1:50 pm
2 stops22h 15m
Castries Hewanorra
Sat 7/11
1:10 pm-12:15 am
2 stops12h 05m
$750
St. LouisCastries
STL - UVF
STLUVF
Lambert-St Louis
Mon 9/14
5:46 pm-1:50 pm
2 stops19h 04m
Castries Hewanorra
Mon 9/21
4:00 pm-1:22 pm
1 stop22h 22m
$764
St. LouisCastries
STL - UVF
STLUVF
Lambert-St Louis
Thu 10/8
9:38 am-1:25 pm
1 stop26h 47m
Castries Hewanorra
Sun 10/11
4:20 pm-8:03 am
1 stop16h 43m
$815
Quickest round-trip
St. LouisCastries
STL - UVF
STLUVF
Lambert-St Louis
Mon 9/7
5:00 am-2:04 pm
1 stop8h 04m
Castries Hewanorra
Sat 9/12
4:00 pm-1:22 pm
1 stop22h 22m
$865
St. LouisCastries
STL - UVF
STLUVF
Lambert-St Louis
Fri 10/2
6:31 pm-1:50 pm
2 stops18h 19m
Castries Hewanorra
Mon 10/12
4:00 pm-9:27 am
2 stops18h 27m
$968
St. LouisCastries
STL - SLU
STLSLU
Lambert-St Louis
Fri 6/5
2:15 pm-7:00 pm
2 stops27h 45m
Castries George F. L. Charle
Sun 6/7
12:35 pm-12:16 pm
2 stops24h 41m
$1,015
St. LouisCastries
STL - SLU
STLSLU
Lambert-St Louis
Fri 9/18
8:55 am-7:00 pm
2 stops33h 05m
Castries George F. L. Charle
Fri 9/25
12:35 pm-2:00 pm
2 stops26h 25m
$1,085
St. LouisCastries
STL - SLU
STLSLU
Lambert-St Louis
Tue 8/18
8:55 am-7:00 pm
2 stops33h 05m
Castries George F. L. Charle
Sun 8/23
12:35 pm-8:07 pm
2 stops32h 32m
$1,100
St. LouisCastries
STL - SLU
STLSLU
Lambert-St Louis
Fri 10/23
8:55 am-7:00 pm
2 stops33h 05m
Castries George F. L. Charle
Mon 10/26
9:10 am-3:30 pm
2 stops31h 20m
$1,215
Showing 1-10 of 13 resultsSorted 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 $565). Flying from St. Louis to Saint Lucia in June is currently the most expensive (average of $745). 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 May 6, 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.
Entertainment
7.8
Overall
7.9
Boarding
8.1
Food
7.2
Comfort
7.9
Crew
8.5
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Entertainment
7.8
Overall
7.9
Boarding
8.1
Food
7.2
Comfort
7.9
Crew
8.5
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Entertainment
7.8
Overall
7.9
Boarding
8.1
Food
7.2
Comfort
7.9
Crew
8.5
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
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
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.
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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 May 6, 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 May 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$575 | Average$745 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$600 | Average$780 | FlexibilityNo cancel fee | On-timeN/A |