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Cheap flights from St. Louis to Castries from $464

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 8/10. 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
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
$464Air Canada
Mon, Aug 10 - Tue, Aug 18
Air Canada Logo
8:55 am - 2:20 pm
STL
-
UVF
28h 25m
1 stop
Air Canada Logo
3:15 pm - 2:02 pm
UVF
-
STL
23h 47m
1 stop
$470Air Canada
Mon, Aug 10 - Tue, Aug 18
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
$588Air 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
$592Air 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 - 6:42 pm
UVF
-
STL
52h 27m
2 stops
$605Air Canada
Mon, Aug 10 - Tue, Aug 18
Air Canada Logo
2:15 pm - 2:10 pm
STL
-
UVF
22h 55m
1 stop
Air Canada Logo
3:05 pm - 12:06 pm
UVF
-
STL
22h 01m
1 stop
$636Air Canada
Thu, Jun 4 - Tue, Jun 9
Air Canada Logo
2:15 pm - 2:10 pm
STL
-
UVF
22h 55m
1 stop
Air Canada Logo
3:05 pm - 8:25 pm
UVF
-
STL
30h 20m
2 stops
$640Air Canada
Thu, Jun 4 - Tue, Jun 9
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
$662Air 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
$666Air 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 - 6:42 pm
UVF
-
STL
28h 27m
2 stops
$699Air Canada
Mon, Aug 10 - Tue, Aug 18

American Airlines flights from St. Louis to Castries

Our best American Airlines deals on St. Louis to Castries flight tickets
American Airlines
Jul 13
STL6:13 pmLambert-St Louis
17h 02m
2 stops
UVF12:15 pmCastries Hewanorra
Jul 16
UVF2:50 pmCastries Hewanorra
18h 56m
2 stops
STL8:46 amLambert-St Louis
$745
American Airlines
Jul 11
STL5:10 amLambert-St Louis
8h 22m
1 stop
UVF2:32 pmCastries Hewanorra
Jul 17
UVF3:20 pmCastries Hewanorra
22h 30m
2 stops
STL12:50 pmLambert-St Louis
$750
American Airlines
Jun 23
STL5:40 pmLambert-St Louis
19h 06m
2 stops
UVF1:46 pmCastries Hewanorra
Jun 30
UVF3:16 pmCastries Hewanorra
9h 28m
1 stop
STL11:44 pmLambert-St Louis
$753

United Airlines flights from St. Louis to Castries

Our best United Airlines deals on St. Louis to Castries flight tickets
United Airlines
Jul 4
STL6:00 amLambert-St Louis
8h 31m
1 stop
UVF3:31 pmCastries Hewanorra
Jul 11
UVF12:55 pmCastries Hewanorra
9h 31m
1 stop
STL9:26 pmLambert-St Louis
$759
United Airlines
May 28
STL1:13 pmLambert-St Louis
45h 57m
2 stops
UVF12:10 pmCastries Hewanorra
May 30
UVF4:22 pmCastries Hewanorra
24h 24m
2 stops
STL3:46 pmLambert-St Louis
$1,248
United Airlines
May 28
STL4:48 pmLambert-St Louis
42h 22m
1 stop
UVF12:10 pmCastries Hewanorra
May 30
UVF4:22 pmCastries Hewanorra
23h 01m
2 stops
STL2:23 pmLambert-St Louis
$1,351

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 May 24, 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

12:10 pm-2:20 pm

2 stops25h 10m

Castries Hewanorra

Tue 8/18

3:15 pm-2:02 pm

1 stop23h 47m

$464

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 8/10

8:55 am-2:20 pm

1 stop28h 25m

Castries Hewanorra

Tue 8/18

3:15 pm-2:02 pm

1 stop23h 47m

$470

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

$588

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

$592

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-6:42 pm

2 stops52h 27m

$605
Quickest round-trip

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Thu 6/4

2:15 pm-2:10 pm

1 stop22h 55m

Castries Hewanorra

Tue 6/9

3:05 pm-12:06 pm

1 stop22h 01m

$636

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Thu 6/4

2:15 pm-2:10 pm

1 stop22h 55m

Castries Hewanorra

Tue 6/9

3:05 pm-8:25 pm

2 stops30h 20m

$640

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

$662

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

$666

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-6:42 pm

2 stops28h 27m

$699

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

What is the cheapest month to fly to Castries?

The month of August is, on average, the cheapest month to fly to Castries from St. Louis, with most prices found around $652. 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

7h 08m

Direct flights

None
The fastest flight from St. Louis to Castries takes 7h 08m
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 7h 08m.

  • 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
11,631 reviews
Search American Airlines flights
DeltaPriceFrom $600Free CancellationRating
7.9
8,436 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.

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Find better results for your trip to Saint Lucia

Airports servicing Saint Lucia

Castries George F. L. Charle Airport