Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Castries from $592

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Castries departing on 2/22. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to Castries

Cheap round-trip flights

American Airlines Logo
4:58 pm - 2:15 pmSTL-UVF
19h 17m2 stops
American Airlines Logo
3:35 pm - 9:56 amUVF-STL
20h 21m2 stops
$592American Airlines
Find Deal
Sun, Feb 22 - Fri, Feb 27
Delta Logo
6:00 am - 3:04 pmSTL-UVF
7h 04m1 stop
Delta Logo
4:24 pm - 11:40 pmUVF-STL
9h 16m1 stop
$600Delta
Find Deal
Thu, Feb 5 - Tue, Feb 10
American Airlines Logo
4:59 pm - 2:35 pmSTL-UVF
19h 36m1 stop
American Airlines Logo
3:35 pm - 9:56 amUVF-STL
20h 21m2 stops
$603American Airlines
Find Deal
Sun, Feb 22 - Fri, Feb 27
American Airlines Logo
5:20 am - 3:50 pmSTL-UVF
8h 30m1 stop
American Airlines Logo
4:50 pm - 12:07 pmUVF-STL
21h 17m2 stops
$605American Airlines
Find Deal
Mon, Jan 26 - Sat, Jan 31
American Airlines Logo
7:01 pm - 2:15 pmSTL-UVF
17h 14m1 stop
American Airlines Logo
5:00 pm - 8:06 amUVF-STL
17h 06m1 stop
$612American Airlines
Find Deal
Mon, Feb 16 - Mon, Feb 23
American Airlines Logo
4:44 pm - 2:35 pmSTL-UVF
19h 51m2 stops
American Airlines Logo
5:00 pm - 8:06 amUVF-STL
17h 06m1 stop
$617American Airlines
Find Deal
Mon, Feb 16 - Mon, Feb 23
American Airlines Logo
5:15 am - 3:52 pmSTL-UVF
8h 37m1 stop
American Airlines Logo
4:05 pm - 11:07 pmUVF-STL
9h 02m1 stop
$625American Airlines
Find Deal
Tue, Nov 25 - Tue, Dec 2
American Airlines Logo
5:15 am - 3:52 pmSTL-UVF
8h 37m1 stop
American Airlines Logo
4:52 pm - 9:23 amUVF-STL
18h 31m2 stops
$630American Airlines
Find Deal
Tue, Nov 25 - Tue, Dec 2
Multiple Airlines Logo
1:30 pm - 2:15 pmSTL-UVF
23h 45m2 stops
Multiple Airlines Logo
3:10 pm - 6:10 pmUVF-STL
28h 00m3 stops
$1,411Multiple Airlines
Find Deal
Mon, Oct 13 - Fri, Oct 17
Delta Logo
6:00 am - 3:26 pmSTL-UVF
7h 26m1 stop
Delta Logo
4:59 pm - 8:16 amUVF-STL
17h 17m1 stop
$1,520Delta
Find Deal
Thu, Nov 6 - Tue, Nov 11

American Airlines flights from St. Louis to Castries

Our best American Airlines deals on St. Louis to Castries flight tickets
American Airlines
Feb 22
STL4:58 pmLambert-St Louis
19h 17m
2 stops
UVF2:15 pmCastries Hewanorra
Feb 27
UVF3:35 pmCastries Hewanorra
20h 21m
2 stops
STL9:56 amLambert-St Louis
$592
Find similar
American Airlines
Feb 22
STL4:59 pmLambert-St Louis
19h 36m
1 stop
UVF2:35 pmCastries Hewanorra
Feb 27
UVF3:35 pmCastries Hewanorra
20h 21m
2 stops
STL9:56 amLambert-St Louis
$603
Find similar
American Airlines
Jan 26
STL5:20 amLambert-St Louis
8h 30m
1 stop
UVF3:50 pmCastries Hewanorra
Jan 31
UVF4:50 pmCastries Hewanorra
21h 17m
2 stops
STL12:07 pmLambert-St Louis
$605
Find similar

Delta flights from St. Louis to Castries

Our best Delta deals on St. Louis to Castries flight tickets
Delta
Feb 5
STL6:00 amLambert-St Louis
7h 04m
1 stop
UVF3:04 pmCastries Hewanorra
Feb 10
UVF4:24 pmCastries Hewanorra
9h 16m
1 stop
STL11:40 pmLambert-St Louis
$600
Find similar
Delta
Nov 6
STL6:00 amLambert-St Louis
7h 26m
1 stop
UVF3:26 pmCastries Hewanorra
Nov 11
UVF4:59 pmCastries Hewanorra
17h 17m
1 stop
STL8:16 amLambert-St Louis
$1,520
Find similar

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 September 19, 2025.
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

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sun 2/22

4:58 pm-2:15 pm

2 stops19h 17m

Castries Hewanorra

Fri 2/27

3:35 pm-9:56 am

2 stops20h 21m

$592

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Thu 2/5

6:00 am-3:04 pm

1 stop7h 04m

Castries Hewanorra

Tue 2/10

4:24 pm-11:40 pm

1 stop9h 16m

$600

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sun 2/22

4:59 pm-2:35 pm

1 stop19h 36m

Castries Hewanorra

Fri 2/27

3:35 pm-9:56 am

2 stops20h 21m

$603

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 1/26

5:20 am-3:50 pm

1 stop8h 30m

Castries Hewanorra

Sat 1/31

4:50 pm-12:07 pm

2 stops21h 17m

$605

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 2/16

7:01 pm-2:15 pm

1 stop17h 14m

Castries Hewanorra

Mon 2/23

5:00 pm-8:06 am

1 stop17h 06m

$612

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 2/16

4:44 pm-2:35 pm

2 stops19h 51m

Castries Hewanorra

Mon 2/23

5:00 pm-8:06 am

1 stop17h 06m

$617

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Tue 11/25

5:15 am-3:52 pm

1 stop8h 37m

Castries Hewanorra

Tue 12/2

4:05 pm-11:07 pm

1 stop9h 02m

$625

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Tue 11/25

5:15 am-3:52 pm

1 stop8h 37m

Castries Hewanorra

Tue 12/2

4:52 pm-9:23 am

2 stops18h 31m

$630

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 10/13

1:30 pm-2:15 pm

2 stops23h 45m

Castries Hewanorra

Fri 10/17

3:10 pm-6:10 pm

3 stops28h 00m

$1,411

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Thu 11/6

6:00 am-3:26 pm

1 stop7h 26m

Castries Hewanorra

Tue 11/11

4:59 pm-8:16 am

1 stop17h 17m

$1,520

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 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 $600.

What is the cheapest day to depart on your flight to Castries?

The cheapest day to depart from St. Louis to Castries is on a Tuesday when prices can be found for as low as $614. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $816. These prices are subject to change though, so be sure to set up a Price Alert for flights to Castries.

What is the cheapest time of day to depart on your flight to Castries?

According to our data, the cheapest time of day to fly to Castries is in the afternoon. momondo users have found flights departing from St. Louis to Castries in the afternoon for as low as $658. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Castries are more costly in the morning, with an average ticket price of $761. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

Direct flights

None
There are no direct flights from St. Louis to Castries. There are no popular flight routes from St. Louis to Castries.
Search flight deals

  • 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 7h 02m.

  • 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 $565Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $565Free CancellationRating
7.9
7,964 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.

How can momondo help me find flights from St. Louis to Castries?

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.

I’m not ready to book a flight from St. Louis to Castries right now. Can momondo alert me if prices change?

Yes. momondo can track prices for St. Louis to Castries flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Castries trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sun 10/19
Sun 10/26
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Saint Lucia

Airports servicing Saint Lucia

Castries George F. L. Charle Airport