$309+ Cheap flights from St. Louis (STL) to Saint Lucia
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — UVF
Mar 5 — Mar 121
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
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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 February 3, 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 February 3, 2026.
This Air Canada deal was found by Cheapflights users on 2/1. 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.
Wed 3/184:05 pm
STL
- UVF
1 stop22h 20m
Air Canada
Wed 3/254:20 pm
UVF
- STL
1 stop24h 09m
Air Canada
Deal found 2/1![Air Canada logo]()
$546
This American Airlines deal was found by Cheapflights users on 1/31. 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 10/176:04 pm
STL
- UVF
2 stops18h 21m
American Airlines
Fri 10/234:20 pm
UVF
- STL
1 stop8h 11m
American Airlines
Deal found 1/31![American Airlines logo]()
$601
This Delta deal was found by Cheapflights users on 2/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:00 am
STL
- UVF
1 stop7h 02m
Delta
Tue 4/213:22 pm
UVF
- STL
1 stop18h 08m
Delta
Deal found 2/1![Delta logo]()
$617
This American Airlines deal was found by Cheapflights users on 2/1. 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 11/76:45 pm
STL
- UVF
1 stop18h 15m
American Airlines
Sat 11/144:04 pm
UVF
- STL
1 stop18h 23m
American Airlines
Deal found 2/1![American Airlines logo]()
$621
This American Airlines deal was found by Cheapflights users on 2/1. 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 5/92:12 pm
STL
- UVF
2 stops22h 23m
American Airlines
Fri 5/153:28 pm
UVF
- STL
1 stop18h 02m
American Airlines
Deal found 2/1![American Airlines logo]()
$636
This Delta deal was found by Cheapflights users on 2/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:00 am
STL
- UVF
1 stop7h 02m
Delta
Mon 4/203:22 pm
UVF
- STL
1 stop18h 08m
Delta
Deal found 2/1![Delta logo]()
$642
This American Airlines deal was found by Cheapflights users on 2/3. 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 10/296:28 pm
STL
- UVF
2 stops18h 07m
American Airlines
Mon 11/24:50 pm
UVF
- STL
2 stops17h 37m
American Airlines
Deal found 2/3![American Airlines logo]()
$651
This American Airlines deal was found by Cheapflights users on 2/2. 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.
Thu 10/812:52 pm
STL
- UVF
1 stop23h 33m
American Airlines
Mon 10/124:20 pm
UVF
- STL
1 stop16h 43m
American Airlines
Deal found 2/2![American Airlines logo]()
$656
This American Airlines deal was found by Cheapflights users on 2/2. 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.
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 2/2![American Airlines logo]()
$661
This American Airlines deal was found by Cheapflights users on 2/2. 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 3/25:14 am
STL
- UVF
1 stop7h 34m
American Airlines
Mon 3/93:58 pm
UVF
- STL
1 stop9h 00m
American Airlines
Deal found 2/2![American Airlines logo]()
$663
This Expedia deal was found by Cheapflights users on 2/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/24:05 pm
STL
- SLU
2 stops21h 30m
Multiple Airlines
Mon 3/97:10 pm
SLU
- STL
2 stops45h 19m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$3,683
This Orbitz deal was found by Cheapflights users on 1/31. 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.
Sat 7/188:55 am
STL
- SLU
2 stops28h 40m
Multiple Airlines
Fri 7/246:00 pm
SLU
- STL
3 stops27h 02m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$3,970
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 February 3, 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 February 3, 2026.
This Delta deal was found by Cheapflights users on 2/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:00 am
STL
- UVF
1 stop7h 02m
Delta
Tue 4/213:22 pm
UVF
- STL
1 stop18h 08m
Delta
Deal found 2/1![Delta logo]()
$617
This American Airlines deal was found by Cheapflights users on 2/2. 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 5/92:12 pm
STL
- UVF
2 stops22h 23m
American Airlines
Fri 5/153:28 pm
UVF
- STL
1 stop18h 02m
American Airlines
Deal found 2/2![American Airlines logo]()
$685
This Delta deal was found by Cheapflights users on 2/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:00 am
STL
- UVF
1 stop7h 02m
Delta
Mon 4/203:22 pm
UVF
- STL
1 stop18h 08m
Delta
Deal found 2/1![Delta logo]()
$642
This American Airlines deal was found by Cheapflights users on 2/3. 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 3/25:14 am
STL
- UVF
1 stop7h 34m
American Airlines
Mon 3/93:18 pm
UVF
- STL
1 stop19h 22m
American Airlines
Deal found 2/3![American Airlines logo]()
$702
This Delta deal was found by Cheapflights users on 2/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/176:00 am
STL
- UVF
1 stop7h 02m
Delta
Tue 4/213:22 pm
UVF
- STL
1 stop18h 08m
Delta
Deal found 2/1![Delta logo]()
$663
This American Airlines deal was found by Cheapflights users on 2/1. 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.
Wed 3/185:15 am
STL
- UVF
1 stop8h 43m
American Airlines
Wed 3/253:58 pm
UVF
- STL
2 stops21h 45m
American Airlines
Deal found 2/1![American Airlines logo]()
$707
This Delta deal was found by Cheapflights users on 2/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/176:00 am
STL
- UVF
1 stop7h 02m
Delta
Mon 4/203:22 pm
UVF
- STL
1 stop18h 08m
Delta
Deal found 2/1![Delta logo]()
$688
This American Airlines deal was found by Cheapflights users on 2/2. 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 4/256:53 pm
STL
- UVF
2 stops17h 42m
American Airlines
Sat 5/22:35 pm
UVF
- STL
2 stops18h 55m
American Airlines
Deal found 2/2![American Airlines logo]()
$710
This Expedia deal was found by Cheapflights users on 2/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/24:05 pm
STL
- SLU
2 stops21h 30m
Multiple Airlines
Mon 3/97:10 pm
SLU
- STL
2 stops45h 19m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$3,683
This Orbitz deal was found by Cheapflights users on 1/31. 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.
Sat 7/188:55 am
STL
- SLU
2 stops28h 40m
Multiple Airlines
Fri 7/246:00 pm
SLU
- STL
3 stops27h 02m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$3,970
This Travelocity deal was found by Cheapflights users on 2/2. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/204:05 pm
STL
- SLU
2 stops19h 05m
Multiple Airlines
Mon 2/237:10 pm
SLU
- STL
2 stops46h 19m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$4,478
Last-minute flights from St. Louis to Saint LuciaDiscover last-minute flight deals from St. Louis to Saint Lucia. Data last updated February 3, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Saint Lucia. Data last updated February 3, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 2/1. 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.
Mon 2/165:14 am
STL
- UVF
1 stop7h 34m
American Airlines
Mon 2/234:58 pm
UVF
- STL
1 stop8h 58m
American Airlines
Deal found 2/1![American Airlines logo]()
$791
This American Airlines deal was found by Cheapflights users on 2/2. 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.
Wed 2/186:20 pm
STL
- UVF
1 stop18h 28m
American Airlines
Mon 2/234:58 pm
UVF
- STL
1 stop8h 58m
American Airlines
Deal found 2/2![American Airlines logo]()
$816
This Travelocity deal was found by Cheapflights users on 2/2. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/204:05 pm
STL
- SLU
3 stops45h 10m
Multiple Airlines
Mon 2/237:10 pm
SLU
- STL
2 stops46h 19m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$4,478
This American Airlines deal was found by Cheapflights users on 2/2. 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 3/25:14 am
STL
- UVF
1 stop7h 34m
American Airlines
Mon 3/93:58 pm
UVF
- STL
1 stop9h 00m
American Airlines
Deal found 2/2![American Airlines logo]()
$663
This Expedia deal was found by Cheapflights users on 2/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/24:05 pm
STL
- SLU
2 stops21h 30m
Multiple Airlines
Mon 3/97:10 pm
SLU
- STL
2 stops45h 19m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$3,683
This American Airlines deal was found by Cheapflights users on 2/1. 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 3/76:36 pm
STL
- UVF
2 stops18h 22m
American Airlines
Thu 3/123:18 pm
UVF
- STL
1 stop18h 17m
American Airlines
Deal found 2/1![American Airlines logo]()
$728
This Delta deal was found by Cheapflights users on 2/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/76:00 am
STL
- UVF
1 stop7h 05m
Delta
Thu 3/123:18 pm
UVF
- STL
1 stop9h 40m
Delta
Deal found 2/2![Delta logo]()
$748
This Air Canada deal was found by Cheapflights users on 2/1. 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.
Sat 3/74:05 pm
STL
- UVF
1 stop21h 20m
Air Canada
Thu 3/124:15 pm
UVF
- STL
1 stop24h 14m
Air Canada
Deal found 2/1![Air Canada logo]()
$806
This Air Canada deal was found by Cheapflights users on 2/1. 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.
Wed 3/184:05 pm
STL
- UVF
1 stop22h 20m
Air Canada
Wed 3/254:20 pm
UVF
- STL
1 stop24h 09m
Air Canada
Deal found 2/1![Air Canada logo]()
$546
This American Airlines deal was found by Cheapflights users on 2/2. 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.
Thu 3/196:50 pm
STL
- UVF
2 stops18h 28m
American Airlines
Thu 3/263:58 pm
UVF
- STL
1 stop19h 34m
American Airlines
Deal found 2/2![American Airlines logo]()
$780
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 February 3, 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 February 3, 2026.
This Delta deal was found by Cheapflights users on 2/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:00 am
STL
- UVF
1 stop7h 13m
Delta
Deal found 2/2![Delta logo]()
$309
This American Airlines deal was found by Cheapflights users on 2/2. 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 7/256:12 pm
STL
- UVF
1 stop18h 58m
American Airlines
Deal found 2/2![American Airlines logo]()
$324
This United Airlines deal was found by Cheapflights users on 2/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/75:00 am
STL
- UVF
1 stop9h 25m
United Airlines
Deal found 2/3![United Airlines logo]()
$334
This American Airlines deal was found by Cheapflights users on 2/3. 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.
Sat 3/76:18 pm
STL
- UVF
2 stops18h 40m
American Airlines
Deal found 2/3![American Airlines logo]()
$354
This American Airlines deal was found by Cheapflights users on 2/2. 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 7/185:18 pm
STL
- UVF
2 stops19h 52m
American Airlines
Deal found 2/2![American Airlines logo]()
$359
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Sat 7/186:00 am
STL
- UVF
1 stop8h 31m
United Airlines
Deal found 2/2![United Airlines logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/75:50 pm
STL
- UVF
3 stops21h 20m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$826
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Tue 7/2110:45 am
STL
- UVF
3 stops49h 55m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$841
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 7/186:45 am
STL
- UVF
3 stops29h 59m
WestJet
Deal found 2/2![WestJet logo]()
$948
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 February 3, 2026.
Round-trip from | $546 (Air Canada) |
|---|---|
One-way from | $309 (Delta) |
Popular in | June |
Cheapest in | July |
Average price | $741 |
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 February 3, 2026.
Use the filters below to find and compare flights from St. Louis to Saint Lucia that are best for you.
Fly from
St. Louis
Fly to
Saint Lucia
Route
Depart
Return
Price
St. LouisCastries
STL - UVF
STLUVF
Lambert-St Louis
Wed 4/15
6:00 am-2:02 pm
1 stop7h 02m
Castries Hewanorra
Tue 4/21
3:22 pm-8:30 am
1 stop18h 08m
$617
St. LouisCastries
STL - UVF
STLUVF
Lambert-St Louis
Wed 4/15
6:00 am-2:02 pm
1 stop7h 02m
Castries Hewanorra
Mon 4/20
3:22 pm-8:30 am
1 stop18h 08m
$642
St. LouisCastries
STL - UVF
STLUVF
Lambert-St Louis
Fri 4/17
6:00 am-2:02 pm
1 stop7h 02m
Castries Hewanorra
Tue 4/21
3:22 pm-8:30 am
1 stop18h 08m
$663
St. LouisCastries
STL - UVF
STLUVF
Lambert-St Louis
Sat 5/9
2:12 pm-1:35 pm
2 stops22h 23m
Castries Hewanorra
Fri 5/15
3:28 pm-8:30 am
1 stop18h 02m
$685
St. LouisCastries
STL - UVF
STLUVF
Lambert-St Louis
Fri 4/17
6:00 am-2:02 pm
1 stop7h 02m
Castries Hewanorra
Mon 4/20
3:22 pm-8:30 am
1 stop18h 08m
$688
St. LouisCastries
STL - UVF
STLUVF
Lambert-St Louis
Mon 3/2
5:14 am-2:48 pm
1 stop7h 34m
Castries Hewanorra
Mon 3/9
3:18 pm-9:40 am
1 stop19h 22m
$702
St. LouisCastries
STL - UVF
STLUVF
Lambert-St Louis
Wed 3/18
5:15 am-2:58 pm
1 stop8h 43m
Castries Hewanorra
Wed 3/25
3:58 pm-12:43 pm
2 stops21h 45m
$707
St. LouisCastries
STL - UVF
STLUVF
Lambert-St Louis
Sat 4/25
6:53 pm-1:35 pm
2 stops17h 42m
Castries Hewanorra
Sat 5/2
2:35 pm-8:30 am
2 stops18h 55m
$710
St. LouisCastries
STL - SLU
STLSLU
Lambert-St Louis
Mon 3/2
4:05 pm-3:35 pm
2 stops21h 30m
Castries George F. L. Charle
Mon 3/9
7:10 pm-3:29 pm
2 stops45h 19m
$3,683
St. LouisCastries
STL - SLU
STLSLU
Lambert-St Louis
Sat 7/18
8:55 am-2:35 pm
2 stops28h 40m
Castries George F. L. Charle
Fri 7/24
6:00 pm-8:02 pm
3 stops27h 02m
$3,970
Showing 1-10 of 21 results
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, October is the cheapest month in which you can book a flight from St. Louis to Saint Lucia (average of $550). Flying from St. Louis to Saint Lucia in June is currently the most expensive (average of $707). 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 February 3, 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
Boarding
8.1
Overall
7.9
Food
7.2
Crew
8.5
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Boarding
8.1
Overall
7.9
Food
7.2
Crew
8.5
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Boarding
8.1
Overall
7.9
Food
7.2
Crew
8.5
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - 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
See prices for flight routes from nearby airports that may be better suited for you.
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 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$532 | Average$807 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$575 | Average$759 | FlexibilityNo cancel fee | On-timeN/A |