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Cheap flights from St. Louis to Saint Lucia from $286

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 Saint Lucia departing on 11/10. 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 Saint Lucia

Cheap round-trip flights

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
7:01 pm - 2:25 pmSTL-UVF
17h 24m1 stop
American Airlines Logo
3:35 pm - 9:54 amUVF-STL
20h 19m2 stops
$605American Airlines
Find Deal
Thu, Feb 5 - Tue, Feb 10
American Airlines Logo
5:24 am - 2:15 pmSTL-UVF
6h 51m1 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
7:01 pm - 2:35 pmSTL-UVF
17h 34m2 stops
American Airlines Logo
5:00 pm - 11:10 amUVF-STL
20h 10m2 stops
$617American Airlines
Find Deal
Mon, Feb 16 - Mon, Feb 23
American Airlines Logo
6:45 pm - 3:00 pmSTL-UVF
18h 15m1 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
4:45 pm - 1:05 pmSTL-UVF
19h 20m2 stops
American Airlines Logo
4:52 pm - 12:37 pmUVF-STL
21h 45m2 stops
$626American Airlines
Find Deal
Wed, Oct 29 - Wed, Nov 5
Delta Logo
6:01 am - 2:13 pmSTL-UVF
7h 12m1 stop
Delta Logo
3:38 pm - 11:24 pmUVF-STL
8h 46m1 stop
$1,006Delta
Find Deal
Sat, Sep 27 - Thu, Oct 2
United Airlines Logo
5:27 pm - 4:25 pmSTL-UVF
20h 58m1 stop
United Airlines Logo
1:52 pm - 9:43 pmUVF-STL
9h 51m1 stop
$1,272United Airlines
Find Deal
Fri, Dec 12 - Sat, Dec 20
WestJet Logo
6:06 pm - 2:50 pmSTL-UVF
42h 44m2 stops
WestJet Logo
3:40 pm - 11:39 pmUVF-STL
33h 59m2 stops
$3,799WestJet
Find Deal
Sun, Dec 14 - Sun, Dec 21
WestJet Logo
6:06 pm - 2:50 pmSTL-UVF
42h 44m2 stops
WestJet Logo
3:40 pm - 4:18 pmUVF-STL
26h 38m2 stops
$3,947WestJet
Find Deal
Tue, Dec 16 - Tue, Dec 23

Delta flights from St. Louis to Saint Lucia

Our best Delta deals on St. Louis to Saint Lucia 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
Sep 27
STL6:01 amLambert-St Louis
7h 12m
1 stop
UVF2:13 pmCastries Hewanorra
Oct 2
UVF3:38 pmCastries Hewanorra
8h 46m
1 stop
STL11:24 pmLambert-St Louis
$1,006
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

American Airlines flights from St. Louis to Saint Lucia

Our best American Airlines deals on St. Louis to Saint Lucia flight tickets
American Airlines
Feb 5
STL7:01 pmLambert-St Louis
17h 24m
1 stop
UVF2:25 pmCastries Hewanorra
Feb 10
UVF3:35 pmCastries Hewanorra
20h 19m
2 stops
STL9:54 amLambert-St Louis
$605
Find similar
American Airlines
Feb 16
STL5:24 amLambert-St Louis
6h 51m
1 stop
UVF2:15 pmCastries Hewanorra
Feb 23
UVF5:00 pmCastries Hewanorra
17h 06m
1 stop
STL8:06 amLambert-St Louis
$612
Find similar
American Airlines
Feb 16
STL7:01 pmLambert-St Louis
17h 34m
2 stops
UVF2:35 pmCastries Hewanorra
Feb 23
UVF5:00 pmCastries Hewanorra
20h 10m
2 stops
STL11:10 amLambert-St Louis
$617
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Saint Lucia 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 16, 2025.
Use the filters below to find and compare flights from St. Louis to Saint Lucia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

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

Thu 2/5

7:01 pm-2:25 pm

1 stop17h 24m

Castries Hewanorra

Tue 2/10

3:35 pm-9:54 am

2 stops20h 19m

$605

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 2/16

5:24 am-2:15 pm

1 stop6h 51m

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

7:01 pm-2:35 pm

2 stops17h 34m

Castries Hewanorra

Mon 2/23

5:00 pm-11:10 am

2 stops20h 10m

$617

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Tue 11/25

6:45 pm-3:00 pm

1 stop18h 15m

Castries Hewanorra

Tue 12/2

4:05 pm-11:07 pm

1 stop9h 02m

$625

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Wed 10/29

4:45 pm-1:05 pm

2 stops19h 20m

Castries Hewanorra

Wed 11/5

4:52 pm-12:37 pm

2 stops21h 45m

$626

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sat 9/27

6:01 am-2:13 pm

1 stop7h 12m

Castries Hewanorra

Thu 10/2

3:38 pm-11:24 pm

1 stop8h 46m

$1,006

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Fri 12/12

5:27 pm-4:25 pm

1 stop20h 58m

Castries Hewanorra

Sat 12/20

1:52 pm-9:43 pm

1 stop9h 51m

$1,272

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sun 12/14

6:06 pm-2:50 pm

2 stops42h 44m

Castries Hewanorra

Sun 12/21

3:40 pm-11:39 pm

2 stops33h 59m

$3,799

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Tue 12/16

6:06 pm-2:50 pm

2 stops42h 44m

Castries Hewanorra

Tue 12/23

3:40 pm-4:18 pm

2 stops26h 38m

$3,947

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 Saint Lucia from

How to get the cheapest flight ticket from St. Louis to Saint Lucia

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 day to depart on your flight to Saint Lucia?

Our data shows that Wednesday is the least expensive day to fly to Saint Lucia. Tickets to fly out on this day can be as low as $591. On the other hand, Thursday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $862.

Cheap St. Louis to Saint Lucia flight deals and tips

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

Direct flights

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

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

    Prices for flights from Lambert-St Louis Airport to Saint Lucia were last updated today.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Saint Lucia.

  • What documentation or ID do you need to fly to Saint Lucia?

    The necessary travel and health documents for your Saint Lucia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to Saint Lucia

Compare and see reviews for airlines that fly from St. Louis to Saint Lucia with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $533Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $565Free CancellationRating
7.9
7,957 reviews
Search Delta flights

Why use momondo?

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

Finding the right flight to Saint Lucia from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Saint Lucia quick and easy, saving you time and money.

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

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

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

momondo provides multiple filters to help you find the best flight to Saint Lucia from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to Saint Lucia from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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