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Cheap flights from St. Louis to Castries from $429

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Castries departing on 5/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from St. Louis to Castries

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
2:40 pm - 2:20 pm
STL
-
UVF
22h 40m
1 stop
Air Canada Logo
3:15 pm - 2:02 pm
UVF
-
STL
23h 47m
1 stop
$526Air Canada
Mon, Aug 10 - Tue, Aug 18
Air Canada Logo
12:10 pm - 2:20 pm
STL
-
UVF
25h 10m
2 stops
Air Canada Logo
3:15 pm - 2:02 pm
UVF
-
STL
23h 47m
1 stop
$529Air Canada
Mon, Aug 10 - Tue, Aug 18
Air Canada Logo
12:10 pm - 2:20 pm
STL
-
UVF
49h 10m
2 stops
Air Canada Logo
3:15 pm - 2:02 pm
UVF
-
STL
23h 47m
1 stop
$539Air Canada
Sun, Aug 16 - Fri, Aug 21
Air Canada Logo
12:10 pm - 2:20 pm
STL
-
UVF
49h 10m
2 stops
Air Canada Logo
3:15 pm - 8:07 pm
UVF
-
STL
29h 52m
1 stop
$540Air Canada
Sun, Aug 16 - Fri, Aug 21
Air Canada Logo
12:10 pm - 2:20 pm
STL
-
UVF
49h 10m
2 stops
Air Canada Logo
3:15 pm - 6:42 pm
UVF
-
STL
28h 27m
2 stops
$543Air Canada
Sun, Aug 16 - Fri, Aug 21
American Airlines Logo
4:32 pm - 2:15 pm
STL
-
UVF
20h 43m
1 stop
American Airlines Logo
3:15 pm - 11:55 pm
UVF
-
STL
9h 40m
1 stop
$700American Airlines
Sun, Aug 16 - Fri, Aug 21
Delta Logo
6:00 am - 2:12 pm
STL
-
UVF
7h 12m
1 stop
Delta Logo
3:33 pm - 11:40 pm
UVF
-
STL
9h 07m
1 stop
$725Delta
Tue, Jul 7 - Sat, Jul 11
American Airlines Logo
5:52 pm - 2:09 pm
STL
-
UVF
19h 17m
2 stops
American Airlines Logo
3:15 pm - 8:44 am
UVF
-
STL
18h 29m
2 stops
$730American Airlines
Thu, Aug 6 - Thu, Aug 13
Air Canada Logo
6:30 am - 3:25 pm
STL
-
UVF
31h 55m
2 stops
Air Canada Logo
4:20 pm - 8:25 pm
UVF
-
STL
53h 05m
2 stops
$745Air Canada
Wed, Apr 22 - Wed, Apr 29
American Airlines Logo
1:29 pm - 1:09 pm
STL
-
UVF
22h 40m
1 stop
American Airlines Logo
1:05 pm - 10:58 pm
UVF
-
STL
10h 53m
1 stop
$746American Airlines
Fri, May 15 - Fri, May 22

Delta flights from St. Louis to Castries

Our best Delta deals on St. Louis to Castries flight tickets
Delta
Jul 7
STL6:00 amLambert-St Louis
7h 12m
1 stop
UVF2:12 pmCastries Hewanorra
Jul 11
UVF3:33 pmCastries Hewanorra
9h 07m
1 stop
STL11:40 pmLambert-St Louis
$725
Delta
May 9
STL6:00 amLambert-St Louis
7h 09m
1 stop
UVF2:09 pmCastries Hewanorra
May 15
UVF3:25 pmCastries Hewanorra
9h 34m
1 stop
STL11:59 pmLambert-St Louis
$793
Delta
May 9
STL6:00 amLambert-St Louis
7h 09m
1 stop
UVF2:09 pmCastries Hewanorra
May 15
UVF3:25 pmCastries Hewanorra
9h 34m
1 stop
STL11:59 pmLambert-St Louis
$888

American Airlines flights from St. Louis to Castries

Our best American Airlines deals on St. Louis to Castries flight tickets
American Airlines
Aug 16
STL4:32 pmLambert-St Louis
20h 43m
1 stop
UVF2:15 pmCastries Hewanorra
Aug 21
UVF3:15 pmCastries Hewanorra
9h 40m
1 stop
STL11:55 pmLambert-St Louis
$700
American Airlines
Aug 6
STL5:52 pmLambert-St Louis
19h 17m
2 stops
UVF2:09 pmCastries Hewanorra
Aug 13
UVF3:15 pmCastries Hewanorra
18h 29m
2 stops
STL8:44 amLambert-St Louis
$730
American Airlines
May 15
STL1:29 pmLambert-St Louis
22h 40m
1 stop
UVF1:09 pmCastries Hewanorra
May 22
UVF1:05 pmCastries Hewanorra
10h 53m
1 stop
STL10:58 pmLambert-St Louis
$746

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Castries 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, momondo users made 832,500 searches. Data last updated April 2, 2026.
Use the filters below to find and compare flights from St. Louis to Castries that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 8/10

2:40 pm-2:20 pm

1 stop22h 40m

Castries Hewanorra

Tue 8/18

3:15 pm-2:02 pm

1 stop23h 47m

$526

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

$529

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sun 8/16

12:10 pm-2:20 pm

2 stops49h 10m

Castries Hewanorra

Fri 8/21

3:15 pm-2:02 pm

1 stop23h 47m

$539

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sun 8/16

12:10 pm-2:20 pm

2 stops49h 10m

Castries Hewanorra

Fri 8/21

3:15 pm-8:07 pm

1 stop29h 52m

$540

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sun 8/16

12:10 pm-2:20 pm

2 stops49h 10m

Castries Hewanorra

Fri 8/21

3:15 pm-6:42 pm

2 stops28h 27m

$543

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sun 8/16

4:32 pm-2:15 pm

1 stop20h 43m

Castries Hewanorra

Fri 8/21

3:15 pm-11:55 pm

1 stop9h 40m

$700
Quickest round-trip

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Tue 7/7

6:00 am-2:12 pm

1 stop7h 12m

Castries Hewanorra

Sat 7/11

3:33 pm-11:40 pm

1 stop9h 07m

$725

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Thu 8/6

5:52 pm-2:09 pm

2 stops19h 17m

Castries Hewanorra

Thu 8/13

3:15 pm-8:44 am

2 stops18h 29m

$730

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Wed 4/22

6:30 am-3:25 pm

2 stops31h 55m

Castries Hewanorra

Wed 4/29

4:20 pm-8:25 pm

2 stops53h 05m

$745

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Fri 5/15

1:29 pm-1:09 pm

1 stop22h 40m

Castries Hewanorra

Fri 5/22

1:05 pm-10:58 pm

1 stop10h 53m

$746

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Castries from

How to get the cheapest flight ticket from St. Louis to Castries

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between St. Louis and Castries?

What is the cheapest month to fly to Castries?

The month of October is, on average, the cheapest month to fly to Castries from St. Louis, with most prices found around $581. The month of January is another great option to travel to Castries, with average flight prices from St. Louis averaging around $655.

When to book flights from St. Louis to Castries

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Castries according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Castries (STL to UVF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Castries

Fastest flight time

6h 58m

Direct flights

None
The fastest flight from St. Louis to Castries takes 6h 58m
There are no direct flights from St. Louis to Castries. There are no popular flight routes from St. Louis to Castries.
Search flight deals

Frequently asked questions about flying from St. Louis to Castries

  • How far is Lambert-St Louis to Castries Hewanorra by plane?

    The distance between Lambert-St Louis and Castries Hewanorra is about 2460.5 mi. A reasonable flight in good conditions will take 6h 58m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Castries Hewanorra Airport?

    Prices for flights from Lambert-St Louis Airport to Castries Hewanorra Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Castries Hewanorra Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Castries Hewanorra Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Castries Hewanorra Airport.

  • What documentation or ID do you need to fly to Castries Hewanorra Airport?

    The required travel and health documents for your Castries Hewanorra Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Castries Hewanorra Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from St. Louis to Castries?

Best airlines flying from St. Louis to Castries

Compare and see reviews for airlines that fly from St. Louis to Castries with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $575Free CancellationRating
7.1
11,552 reviews
Search American Airlines flights
DeltaPriceFrom $575Free CancellationRating
7.9
8,374 reviews
Search Delta flights

Traveling to a place near Castries?

Book flights to Castries if you plan to visit one of these locations
Vieux Fort

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Castries?

It is quick and easy to find St. Louis to Castries flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Castries that suits you.

Can I find flights from St. Louis to Castries with flexible booking policies on momondo?

All flight searches from St. Louis to Castries on momondo can be filtered to show those which offer flexible booking policies.

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Once all potential St. Louis to Castries flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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Find better results for your trip to Saint Lucia

Airports servicing Saint Lucia

Castries George F. L. Charle Airport