$505 Find Cheap Flights from St. Louis to Saint Lucia

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Saint Lucia departing on 3/29. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Flight Deals

Book Cheap St. Louis to Saint Lucia Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Saint Lucia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Saint Lucia

Sun, Mar 29 - Fri, Apr 3
Air Canada Logo
4:05 pm - 3:30 pmSTL-UVF
22h 25m1 stop
Air Canada Logo
4:20 pm - 3:24 pmUVF-STL
24h 04m1 stop
$505Air Canada
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Tue, Jan 20 - Tue, Jan 27
American Airlines Logo
3:40 pm - 3:03 pmSTL-UVF
21h 23m2 stops
American Airlines Logo
5:02 pm - 9:08 amUVF-STL
18h 06m1 stop
$580American Airlines
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Tue, Jan 20 - Tue, Jan 27
American Airlines Logo
3:54 pm - 3:03 pmSTL-UVF
21h 09m1 stop
American Airlines Logo
4:06 pm - 11:12 pmUVF-STL
9h 06m1 stop
$584American Airlines
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Fri, Jan 23 - Tue, Jan 27
American Airlines Logo
6:02 pm - 2:10 pmSTL-UVF
18h 08m1 stop
American Airlines Logo
4:06 pm - 11:12 pmUVF-STL
9h 06m1 stop
$600American Airlines
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Mon, Feb 16 - Mon, Feb 23
American Airlines Logo
6:59 pm - 2:50 pmSTL-UVF
17h 51m2 stops
American Airlines Logo
5:02 pm - 11:00 amUVF-STL
19h 58m2 stops
$605American Airlines
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Sat, Feb 7 - Sat, Feb 14
American Airlines Logo
10:17 am - 3:03 pmSTL-UVF
26h 46m1 stop
American Airlines Logo
4:24 pm - 8:28 amUVF-STL
18h 04m1 stop
$609American Airlines
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Mon, Feb 16 - Mon, Feb 23
American Airlines Logo
5:05 am - 2:50 pmSTL-UVF
7h 45m1 stop
American Airlines Logo
5:02 pm - 10:27 amUVF-STL
19h 25m1 stop
$612American Airlines
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Tue, Nov 25 - Tue, Dec 2
Delta Logo
6:00 am - 3:39 pmSTL-UVF
7h 39m1 stop
Delta Logo
4:56 pm - 8:24 amUVF-STL
17h 28m1 stop
$695Delta
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Sat, Jan 24 - Sat, Jan 31
Delta Logo
6:00 am - 3:05 pmSTL-UVF
7h 05m1 stop
Delta Logo
4:25 pm - 11:40 pmUVF-STL
9h 15m1 stop
$891Delta
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Thu, Dec 18 - Thu, Dec 25
Delta Logo
6:00 am - 3:36 pmSTL-UVF
7h 36m1 stop
Delta Logo
4:50 pm - 11:38 pmUVF-STL
8h 48m1 stop
$937Delta
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Booking Insights

KAYAK's insights & trends for St. Louis to Saint Lucia flights

Get data-powered insights and trends into flights from St. Louis to Saint Lucia to help you find the cheapest flights, the best time to fly and much more.

Which airlines fly non-stop between St. Louis and Saint Lucia?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from St. Louis to Saint Lucia.

There are 2 airlines that fly nonstop from St. Louis to Saint Lucia. They are American Airlines and Delta. The cheapest airline for this route is American Airlines, with the best round-trip deal found costing $565 and arriving in Castries (UVF). On average, American Airlines offers the best prices for nonstop flights between St. Louis and Saint Lucia.

Which airlines provide the cheapest flights from St. Louis to Saint Lucia?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from St. Louis to Saint Lucia were found on Air Canada ($505) and American Airlines ($580).

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Good to know

Low seasonSeptember
Cheapest flight$505
Best time to beat the crowds with an average 19% drop in price.
Most popular time to fly and prices are also 9% lower on average.
Flight from St. Louis to Castries

FAQs - booking Saint Lucia flights

  • How does KAYAK find such low prices on flights from St. Louis to Saint Lucia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Saint Lucia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Saint Lucia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from St. Louis to Saint Lucia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Saint Lucia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from St. Louis to Saint Lucia with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Saint Lucia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from St. Louis to Saint Lucia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Saint Lucia?

    The cheapest time of day to fly to Saint Lucia is generally in the morning, when round-trip flights cost $749 on average. The most expensive time of day to fly to Saint Lucia is generally in the morning, which is peak travel time and where the average cost of a ticket is $749.

Reviews of the top airlines flying from St. Louis to Saint Lucia

 
Need help choosing which airline to fly with from St. Louis to Saint Lucia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8001 reviews
7.9Entertainment
7.3Food
8.2Boarding
8.5Crew
7.9Comfort
Airline reviews

I truly love flying with Delta. They have always treated me with the upmost respect

10.0 ExcellentMAYRA, Nov 2025JFK - MIA
Read more Delta reviews

I truly love flying with Delta. They have always treated me with the upmost respect

Our flight attendant in FIRST CLASS was one of the worst I’ve ever had. She was not at all pleasant, nor particularly good at her service.

Everything went well and was good. Nothing exceptional, but no complaints either. Cheap seats are pretty comfortable.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The aircraft interior is old and tired on this aircraft. The entertainment system never worked despite the crews attempt to reset the system.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Old plane and old configuration/seats but still comfortable for a morning flight

The flight was smooth, the pilot kept us informed about delays and we arrived more of less on time

Flight delay was communicated before leaving for airport which caused it to be a non-event. Great flight and crew!

Did not get any refreshments. Crew was very nice but limited. Small seats

Wish some foods provided rather than just biscuit/cookie for flight more than 2 hours

Wish a flight with more than 2 hours with some snack rather than just cookie/biscuit.

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

Flight was delayed leaving Dallas. Arrived about 2 hours later than scheduled.

Flight delayed and missed connection. Rescheduled flight cancelled after 6 hrs wait. Rerouted thru ORD, flight cancelled, overnight stay in ORD. Still in the air on new flight!

We are too tired and frustrated to comment politely at this point

Everything you need to know for your flight from St. Louis to Saint Lucia

Information on your arrival and departure airports

St. Louis (STL)

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