$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 12/13. Fares are subject to change and may not be available on all flights or dates of travel.
STL — UVF
Dec 2 — Dec 91
Round-trip
1 adult, Economy
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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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Best
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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 November 2, 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 November 2, 2026.
This Trip.com deal was found by Cheapflights users on 10/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/134:05 pm -
1 stop22h 35m
Sun 12/205:35 pm -
1 stop23h 51m
Deal found 10/29![Air Canada logo]()
$642
This Delta deal was found by Cheapflights users on 11/1. 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 12/166:00 am -
1 stop7h 04m
Wed 12/234:56 pm -
1 stop8h 59m
Deal found 11/1![Delta logo]()
$731
This American Airlines deal was found by Cheapflights users on 11/1. 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 12/175:00 am -
1 stop8h 08m
Thu 12/241:58 pm -
1 stop10h 37m
Deal found 11/1![American Airlines logo]()
$767
This American Airlines deal was found by Cheapflights users on 11/1. 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 12/165:00 am -
1 stop8h 41m
Wed 12/234:15 pm -
2 stops19h 12m
Deal found 11/1![American Airlines logo]()
$774
This American Airlines deal was found by Cheapflights users on 10/29. 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 12/135:38 pm -
2 stops17h 54m
Sun 12/204:15 pm -
1 stop9h 44m
Deal found 10/29![American Airlines logo]()
$776
This Delta deal was found by Cheapflights users on 10/30. 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 12/216:00 am -
1 stop7h 36m
Tue 12/294:56 pm -
1 stop8h 59m
Deal found 10/30![Delta logo]()
$893
This Delta deal was found by Cheapflights users on 11/1. 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.
Mon 11/236:00 am -
1 stop7h 05m
Fri 12/44:26 pm -
1 stop9h 39m
Deal found 11/1![Delta logo]()
$895
This American Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:15 pm -
1 stop17h 14m
Fri 12/44:41 pm -
2 stops19h 25m
Deal found 10/28![American Airlines logo]()
$905
This Delta deal was found by Cheapflights users on 10/30. 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 12/216:00 am -
1 stop7h 36m
Mon 12/284:56 pm -
1 stop8h 59m
Deal found 10/30![Delta logo]()
$929
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 November 2, 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 November 2, 2026.
This Trip.com deal was found by Cheapflights users on 10/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/134:05 pm -
1 stop22h 35m
Sun 12/205:35 pm -
1 stop23h 51m
Deal found 10/29![Air Canada logo]()
$642
This Delta deal was found by Cheapflights users on 10/28. 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 1/66:00 am -
1 stop7h 11m
Wed 1/134:31 pm -
1 stop8h 55m
Deal found 10/28![Delta logo]()
$731
This American Airlines deal was found by Cheapflights users on 11/1. 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 1/75:00 am -
1 stop8h 38m
Tue 1/123:46 pm -
1 stop8h 56m
Deal found 11/1![American Airlines logo]()
$767
This Delta deal was found by Cheapflights users on 10/28. 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 3/317:05 pm -
1 stop17h 55m
Wed 4/73:20 pm -
1 stop9h 19m
Deal found 10/28![Delta logo]()
$731
This Delta deal was found by Cheapflights users on 10/28. 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 3/316:00 am -
1 stop7h 00m
Tue 4/63:20 pm -
1 stop9h 19m
Deal found 10/28![Delta logo]()
$731
This Delta deal was found by Cheapflights users on 11/1. 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 12/166:00 am -
1 stop7h 04m
Wed 12/234:56 pm -
1 stop8h 59m
Deal found 11/1![Delta logo]()
$731
This Delta deal was found by Cheapflights users on 10/28. 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 4/17:05 pm -
1 stop17h 55m
Wed 4/73:20 pm -
1 stop9h 19m
Deal found 10/28![Delta logo]()
$767
This Delta deal was found by Cheapflights users on 11/1. 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 1/296:00 am -
1 stop7h 06m
Fri 2/54:35 pm -
1 stop8h 51m
Deal found 11/1![Delta logo]()
$767
This Delta deal was found by Cheapflights users on 11/1. 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.
Sun 1/316:00 am -
1 stop7h 06m
Sun 2/74:35 pm -
1 stop8h 51m
Deal found 11/1![Delta logo]()
$767
This Delta deal was found by Cheapflights users on 10/28. 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 3/317:05 pm -
1 stop17h 55m
Mon 4/53:20 pm -
1 stop17h 52m
Deal found 10/28![Delta logo]()
$767
This Delta deal was found by Cheapflights users on 10/28. 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 4/26:00 am -
1 stop7h 00m
Wed 4/73:20 pm -
1 stop9h 19m
Deal found 10/28![Delta logo]()
$767
Last-minute flights from St. Louis to Saint LuciaDiscover last-minute flight deals from St. Louis to Saint Lucia. Data last updated November 2, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Saint Lucia. Data last updated November 2, 2026 and is based on user searches.
This Air Canada deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/294:05 pm -
1 stop22h 35m
Mon 11/25:35 pm -
1 stop23h 51m
Deal found 10/28![Air Canada logo]()
$1,149
This American Airlines deal was found by Cheapflights users on 10/28. 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 11/45:00 am -
1 stop8h 41m
Wed 11/114:07 pm -
1 stop18h 00m
Deal found 10/28![American Airlines logo]()
$976
This Delta deal was found by Cheapflights users on 11/1. 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.
Tue 11/176:00 am -
1 stop7h 05m
Tue 11/244:25 pm -
1 stop9h 31m
Deal found 11/1![Delta logo]()
$971
This American Airlines deal was found by Cheapflights users on 10/29. 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 11/175:29 pm -
2 stops19h 35m
Tue 11/242:38 pm -
1 stop9h 12m
Deal found 10/29![American Airlines logo]()
$975
This Delta deal was found by Cheapflights users on 11/1. 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.
Mon 11/236:00 am -
1 stop7h 05m
Fri 12/44:26 pm -
1 stop9h 39m
Deal found 11/1![Delta logo]()
$895
This American Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:15 pm -
1 stop17h 14m
Fri 12/44:41 pm -
2 stops19h 25m
Deal found 10/28![American Airlines logo]()
$905
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 November 2, 2026.
Round-trip from | $642 (Trip.com) |
|---|
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 November 2, 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 12/13
4:05 pm-4:40 pm
1 stop22h 35m
Castries Hewanorra
Sun 12/20
5:35 pm-3:26 pm
1 stop23h 51m
$642
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Wed 1/6
6:00 am-3:11 pm
1 stop7h 11m
Castries Hewanorra
Wed 1/13
4:31 pm-11:26 pm
1 stop8h 55m
$731
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Wed 3/31
7:05 pm-2:00 pm
1 stop17h 55m
Castries Hewanorra
Wed 4/7
3:20 pm-11:39 pm
1 stop9h 19m
$731
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Wed 3/31
6:00 am-2:00 pm
1 stop7h 00m
Castries Hewanorra
Tue 4/6
3:20 pm-11:39 pm
1 stop9h 19m
$731
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Wed 12/16
6:00 am-3:04 pm
1 stop7h 04m
Castries Hewanorra
Wed 12/23
4:56 pm-11:55 pm
1 stop8h 59m
$731
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Thu 1/7
5:00 am-3:38 pm
1 stop8h 38m
Castries Hewanorra
Tue 1/12
3:46 pm-10:42 pm
1 stop8h 56m
$767
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Thu 4/1
7:05 pm-2:00 pm
1 stop17h 55m
Castries Hewanorra
Wed 4/7
3:20 pm-11:39 pm
1 stop9h 19m
$767
Quickest round-trip
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Fri 1/29
6:00 am-3:06 pm
1 stop7h 06m
Castries Hewanorra
Fri 2/5
4:35 pm-11:26 pm
1 stop8h 51m
$767
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Sun 1/31
6:00 am-3:06 pm
1 stop7h 06m
Castries Hewanorra
Sun 2/7
4:35 pm-11:26 pm
1 stop8h 51m
$767
St. LouisCastries
STL Lambert-St Louis - UVF Castries Hewanorra
STLUVF
Lambert-St Louis
Wed 3/31
7:05 pm-2:00 pm
1 stop17h 55m
Castries Hewanorra
Mon 4/5
3:20 pm-8:12 am
1 stop17h 52m
$767
Showing 1-10 of 11 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
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 November 2, 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.
Comfort
7.8
Boarding
8.1
Food
7.2
Entertainment
7.8
Crew
8.5
Overall
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Comfort
7.8
Boarding
8.1
Food
7.2
Entertainment
7.8
Crew
8.5
Overall
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Comfort
7.8
Boarding
8.1
Food
7.2
Entertainment
7.8
Crew
8.5
Overall
7.8
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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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 November 2, 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 November 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$630 | Average$965 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$713 | Average$838 | FlexibilityNo cancel fee | On-time71% |