Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Saint Lucia from $423

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 Saint Lucia departing on 5/28. 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
1 adult, Economy, 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 Saint Lucia

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
7:05 am - 2:05 pm
STL
-
UVF
30h 00m
1 stop
Air Canada Logo
3:05 pm - 12:06 pm
UVF
-
STL
22h 01m
1 stop
$423Air Canada
Thu, May 28 - Fri, Jun 5
Air Canada Logo
1:05 pm - 2:05 pm
STL
-
UVF
24h 00m
2 stops
Air Canada Logo
3:05 pm - 12:06 pm
UVF
-
STL
22h 01m
1 stop
$427Air Canada
Thu, May 28 - Fri, Jun 5
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
$556Air 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
$559Air Canada
Sun, Aug 16 - Fri, Aug 21
Air Canada Logo
2:40 pm - 2:20 pm
STL
-
UVF
22h 40m
1 stop
Air Canada Logo
3:05 pm - 2:02 pm
UVF
-
STL
23h 57m
1 stop
$572Air Canada
Mon, Jul 20 - Fri, Jul 24
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
$576Air Canada
Sun, Aug 16 - Fri, Aug 21
American Airlines Logo
5:27 am - 2:15 pm
STL
-
UVF
7h 48m
1 stop
American Airlines Logo
3:09 pm - 11:59 pm
UVF
-
STL
9h 50m
1 stop
$690American Airlines
Sun, Aug 9 - Thu, Aug 13
American Airlines Logo
5:52 pm - 2:09 pm
STL
-
UVF
19h 17m
2 stops
American Airlines Logo
3:15 pm - 8:04 am
UVF
-
STL
17h 49m
1 stop
$695American Airlines
Sun, Aug 9 - Thu, Aug 13
American Airlines Logo
4:32 pm - 2:15 pm
STL
-
UVF
20h 43m
1 stop
American Airlines Logo
3:09 pm - 11:59 pm
UVF
-
STL
9h 50m
1 stop
$700American Airlines
Sun, Aug 16 - Fri, Aug 21
Multiple Airlines Logo
7:05 am - 1:10 pm
STL
-
SLU
29h 05m
2 stops
Multiple Airlines Logo
6:00 pm - 12:06 pm
SLU
-
STL
43h 06m
2 stops
$1,471Multiple Airlines
Fri, May 8 - Fri, May 15

Air Canada flights from St. Louis to Saint Lucia

Our best Air Canada deals on St. Louis to Saint Lucia flight tickets
Air Canada
May 28
STL7:05 amLambert-St Louis
30h 00m
1 stop
UVF2:05 pmCastries Hewanorra
Jun 5
UVF3:05 pmCastries Hewanorra
22h 01m
1 stop
STL12:06 pmLambert-St Louis
$423
Air Canada
May 28
STL1:05 pmLambert-St Louis
24h 00m
2 stops
UVF2:05 pmCastries Hewanorra
Jun 5
UVF3:05 pmCastries Hewanorra
22h 01m
1 stop
STL12:06 pmLambert-St Louis
$427
Air Canada
Aug 16
STL12:10 pmLambert-St Louis
49h 10m
2 stops
UVF2:20 pmCastries Hewanorra
Aug 21
UVF3:15 pmCastries Hewanorra
23h 47m
1 stop
STL2:02 pmLambert-St Louis
$556

American Airlines flights from St. Louis to Saint Lucia

Our best American Airlines deals on St. Louis to Saint Lucia flight tickets
American Airlines
Aug 9
STL5:27 amLambert-St Louis
7h 48m
1 stop
UVF2:15 pmCastries Hewanorra
Aug 13
UVF3:09 pmCastries Hewanorra
9h 50m
1 stop
STL11:59 pmLambert-St Louis
$690
American Airlines
Aug 9
STL5:52 pmLambert-St Louis
19h 17m
2 stops
UVF2:09 pmCastries Hewanorra
Aug 13
UVF3:15 pmCastries Hewanorra
17h 49m
1 stop
STL8:04 amLambert-St Louis
$695
American Airlines
Aug 16
STL4:32 pmLambert-St Louis
20h 43m
1 stop
UVF2:15 pmCastries Hewanorra
Aug 21
UVF3:09 pmCastries Hewanorra
9h 50m
1 stop
STL11:59 pmLambert-St Louis
$700

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 March 24, 2026.
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

Cheapest round-trip

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Thu 5/28

7:05 am-2:05 pm

1 stop30h 00m

Castries Hewanorra

Fri 6/5

3:05 pm-12:06 pm

1 stop22h 01m

$423

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Thu 5/28

1:05 pm-2:05 pm

2 stops24h 00m

Castries Hewanorra

Fri 6/5

3:05 pm-12:06 pm

1 stop22h 01m

$427

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

$556

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

$559

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 7/20

2:40 pm-2:20 pm

1 stop22h 40m

Castries Hewanorra

Fri 7/24

3:05 pm-2:02 pm

1 stop23h 57m

$572

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

$576
Quickest round-trip

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sun 8/9

5:27 am-2:15 pm

1 stop7h 48m

Castries Hewanorra

Thu 8/13

3:09 pm-11:59 pm

1 stop9h 50m

$690

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sun 8/9

5:52 pm-2:09 pm

2 stops19h 17m

Castries Hewanorra

Thu 8/13

3:15 pm-8:04 am

1 stop17h 49m

$695

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

3:09 pm-11:59 pm

1 stop9h 50m

$700

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Fri 5/8

7:05 am-1:10 pm

2 stops29h 05m

Castries George F. L. Charle

Fri 5/15

6:00 pm-12:06 pm

2 stops43h 06m

$1,471

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

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 airline that flies from Lambert-St Louis to Saint Lucia?

American Airlines is the most popular carrier operating from Lambert-St Louis to Saint Lucia

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

Fastest flight time

7h 02m

Direct flights

None
The fastest flight from St. Louis to Saint Lucia takes 7h 02m
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 $575Free CancellationRating
7.1
11,492 reviews
Search American Airlines flights
DeltaPriceFrom $575Free CancellationRating
7.9
8,320 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.

An easier way to manage your Saint Lucia 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
Thu 4/23
Thu 4/30
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Saint Lucia

Popular cities in Saint Lucia

Popular flights according to clicks in the last 7 days on momondo
Flights to Castriesfrom $477