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Cheap flights from St. Louis to Castries from $162

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 4/21. 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
4:05 pm - 3:10 pm
STL
-
UVF
22h 05m
1 stop
Air Canada Logo
4:15 pm - 12:06 pm
UVF
-
STL
20h 51m
1 stop
$498Air Canada
Sat, Apr 25 - Thu, Apr 30
Air Canada Logo
4:05 pm - 3:20 pm
STL
-
UVF
22h 15m
1 stop
Air Canada Logo
4:20 pm - 3:24 pm
UVF
-
STL
24h 04m
1 stop
$500Air Canada
Tue, Apr 21 - Wed, Apr 29
Air Canada Logo
4:05 pm - 3:10 pm
STL
-
UVF
22h 05m
1 stop
Air Canada Logo
4:20 pm - 8:05 pm
UVF
-
STL
52h 45m
2 stops
$502Air Canada
Sat, Apr 25 - Wed, Apr 29
Air Canada Logo
4:05 pm - 3:20 pm
STL
-
UVF
22h 15m
1 stop
Air Canada Logo
4:20 pm - 8:05 pm
UVF
-
STL
52h 45m
2 stops
$504Air Canada
Tue, Apr 21 - Wed, Apr 29
Air Canada Logo
4:05 pm - 3:10 pm
STL
-
UVF
22h 05m
1 stop
Air Canada Logo
4:15 pm - 3:24 pm
UVF
-
STL
24h 09m
1 stop
$612Air Canada
Sun, Apr 12 - Fri, Apr 17
Delta Logo
6:00 am - 2:02 pm
STL
-
UVF
7h 02m
1 stop
Delta Logo
3:22 pm - 8:30 am
UVF
-
STL
18h 08m
1 stop
$621Delta
Fri, Apr 24 - Wed, Apr 29
American Airlines Logo
8:03 pm - 2:23 pm
STL
-
UVF
17h 20m
2 stops
American Airlines Logo
3:28 pm - 8:30 am
UVF
-
STL
18h 02m
1 stop
$625American Airlines
Sun, Apr 12 - Fri, Apr 17
American Airlines Logo
3:43 pm - 1:35 pm
STL
-
UVF
20h 52m
2 stops
American Airlines Logo
2:35 pm - 10:24 pm
UVF
-
STL
8h 49m
1 stop
$626American Airlines
Fri, Apr 24 - Thu, Apr 30
American Airlines Logo
6:11 pm - 2:23 pm
STL
-
UVF
19h 12m
2 stops
American Airlines Logo
3:28 pm - 8:30 am
UVF
-
STL
18h 02m
1 stop
$636American Airlines
Sat, May 9 - Fri, May 15
American Airlines Logo
6:11 pm - 2:23 pm
STL
-
UVF
19h 12m
2 stops
American Airlines Logo
3:28 pm - 8:30 am
UVF
-
STL
18h 02m
1 stop
$655American Airlines
Sat, May 9 - Fri, May 15

Air Canada flights from St. Louis to Castries

Our best Air Canada deals on St. Louis to Castries flight tickets
Air Canada
Apr 25
STL4:05 pmLambert-St Louis
22h 05m
1 stop
UVF3:10 pmCastries Hewanorra
Apr 30
UVF4:15 pmCastries Hewanorra
20h 51m
1 stop
STL12:06 pmLambert-St Louis
$498
Air Canada
Apr 21
STL4:05 pmLambert-St Louis
22h 15m
1 stop
UVF3:20 pmCastries Hewanorra
Apr 29
UVF4:20 pmCastries Hewanorra
24h 04m
1 stop
STL3:24 pmLambert-St Louis
$500
Air Canada
Apr 25
STL4:05 pmLambert-St Louis
22h 05m
1 stop
UVF3:10 pmCastries Hewanorra
Apr 29
UVF4:20 pmCastries Hewanorra
52h 45m
2 stops
STL8:05 pmLambert-St Louis
$502

Delta flights from St. Louis to Castries

Our best Delta deals on St. Louis to Castries flight tickets
Delta
Apr 24
STL6:00 amLambert-St Louis
7h 02m
1 stop
UVF2:02 pmCastries Hewanorra
Apr 29
UVF3:22 pmCastries Hewanorra
18h 08m
1 stop
STL8:30 amLambert-St Louis
$621
Delta
Apr 23
STL6:00 amLambert-St Louis
7h 02m
1 stop
UVF2:02 pmCastries Hewanorra
Apr 29
UVF3:22 pmCastries Hewanorra
9h 12m
1 stop
STL11:34 pmLambert-St Louis
$681
Delta
Mar 6
STL6:00 amLambert-St Louis
7h 05m
1 stop
UVF3:05 pmCastries Hewanorra
Mar 13
UVF3:18 pmCastries Hewanorra
9h 40m
1 stop
STL11:58 pmLambert-St Louis
$703

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 February 7, 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

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sat 4/25

4:05 pm-3:10 pm

1 stop22h 05m

Castries Hewanorra

Thu 4/30

4:15 pm-12:06 pm

1 stop20h 51m

$498

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Tue 4/21

4:05 pm-3:20 pm

1 stop22h 15m

Castries Hewanorra

Wed 4/29

4:20 pm-3:24 pm

1 stop24h 04m

$500

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sat 4/25

4:05 pm-3:10 pm

1 stop22h 05m

Castries Hewanorra

Wed 4/29

4:20 pm-8:05 pm

2 stops52h 45m

$502

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Tue 4/21

4:05 pm-3:20 pm

1 stop22h 15m

Castries Hewanorra

Wed 4/29

4:20 pm-8:05 pm

2 stops52h 45m

$504

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sun 4/12

4:05 pm-3:10 pm

1 stop22h 05m

Castries Hewanorra

Fri 4/17

4:15 pm-3:24 pm

1 stop24h 09m

$612

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Fri 4/24

6:00 am-2:02 pm

1 stop7h 02m

Castries Hewanorra

Wed 4/29

3:22 pm-8:30 am

1 stop18h 08m

$621

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sun 4/12

8:03 pm-2:23 pm

2 stops17h 20m

Castries Hewanorra

Fri 4/17

3:28 pm-8:30 am

1 stop18h 02m

$625

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Fri 4/24

3:43 pm-1:35 pm

2 stops20h 52m

Castries Hewanorra

Thu 4/30

2:35 pm-10:24 pm

1 stop8h 49m

$626

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sat 5/9

6:11 pm-2:23 pm

2 stops19h 12m

Castries Hewanorra

Fri 5/15

3:28 pm-8:30 am

1 stop18h 02m

$636

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sat 5/9

6:11 pm-2:23 pm

2 stops19h 12m

Castries Hewanorra

Fri 5/15

3:28 pm-8:30 am

1 stop18h 02m

$655

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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 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 $575. 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

  • 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
7.2
11,247 reviews
Search American Airlines flights
DeltaPriceFrom $575Free CancellationRating
7.9
8,162 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.

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Find better results for your trip to Saint Lucia

Airports servicing Saint Lucia

Castries George F. L. Charle Airport