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Cheap flights from St. Louis to Saint Lucia from $519

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 10/21. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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
12:10 pm - 2:15 pm
STL
-
UVF
49h 05m
2 stops
Air Canada Logo
4:40 pm - 3:26 pm
UVF
-
STL
23h 46m
1 stop
$519Air Canada
Wed, Oct 21 - Sun, Oct 25
Air Canada Logo
2:40 pm - 2:20 pm
STL
-
UVF
22h 40m
1 stop
Air Canada Logo
3:15 pm - 2:04 pm
UVF
-
STL
23h 49m
1 stop
$535Air Canada
Mon, Aug 24 - Fri, Aug 28
Air Canada Logo
12:10 pm - 2:20 pm
STL
-
UVF
25h 10m
2 stops
Air Canada Logo
3:15 pm - 2:04 pm
UVF
-
STL
23h 49m
1 stop
$538Air Canada
Mon, Aug 24 - Fri, Aug 28
Air Canada Logo
2:40 pm - 2:20 pm
STL
-
UVF
22h 40m
1 stop
Air Canada Logo
3:15 pm - 2:04 pm
UVF
-
STL
23h 49m
1 stop
$550Air Canada
Mon, Aug 24 - Fri, Aug 28
Air Canada Logo
4:05 pm - 4:40 pm
STL
-
UVF
22h 35m
1 stop
Air Canada Logo
5:40 pm - 3:26 pm
UVF
-
STL
23h 46m
1 stop
$558Air Canada
Sun, Nov 15 - Fri, Nov 20
Air Canada Logo
4:05 pm - 3:40 pm
STL
-
UVF
22h 35m
1 stop
Air Canada Logo
5:40 pm - 3:26 pm
UVF
-
STL
23h 46m
1 stop
$560Air Canada
Thu, Oct 29 - Fri, Nov 6
Air Canada Logo
4:05 pm - 4:40 pm
STL
-
UVF
22h 35m
1 stop
Air Canada Logo
5:40 pm - 3:26 pm
UVF
-
STL
23h 46m
1 stop
$590Air Canada
Wed, Nov 18 - Sun, Nov 22
Air Canada Logo
12:10 pm - 2:20 pm
STL
-
UVF
25h 10m
2 stops
Air Canada Logo
3:15 pm - 2:04 pm
UVF
-
STL
23h 49m
1 stop
$593Air Canada
Mon, Aug 24 - Fri, Aug 28
Multiple Airlines Logo
8:55 am - 7:00 pm
STL
-
SLU
33h 05m
2 stops
Multiple Airlines Logo
12:35 pm - 2:00 pm
SLU
-
STL
26h 25m
2 stops
$922Multiple Airlines
Fri, Sep 11 - Sat, Sep 19
Multiple Airlines Logo
8:55 am - 7:00 pm
STL
-
SLU
33h 05m
2 stops
Multiple Airlines Logo
3:45 pm - 3:26 pm
SLU
-
STL
48h 41m
2 stops
$937Multiple Airlines
Sun, Oct 18 - Sat, Oct 24

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Air Canada flights from St. Louis to Saint Lucia

Our best Air Canada deals on St. Louis to Saint Lucia flight tickets
Air Canada
Oct 21
STL12:10 pmLambert-St Louis
49h 05m
2 stops
UVF2:15 pmCastries Hewanorra
Oct 25
UVF4:40 pmCastries Hewanorra
23h 46m
1 stop
STL3:26 pmLambert-St Louis
$519
Air Canada
Aug 24
STL2:40 pmLambert-St Louis
22h 40m
1 stop
UVF2:20 pmCastries Hewanorra
Aug 28
UVF3:15 pmCastries Hewanorra
23h 49m
1 stop
STL2:04 pmLambert-St Louis
$535
Air Canada
Aug 24
STL12:10 pmLambert-St Louis
25h 10m
2 stops
UVF2:20 pmCastries Hewanorra
Aug 28
UVF3:15 pmCastries Hewanorra
23h 49m
1 stop
STL2:04 pmLambert-St Louis
$538

Delta flights from St. Louis to Saint Lucia

Our best Delta deals on St. Louis to Saint Lucia flight tickets
Delta
Nov 23
STL6:00 amLambert-St Louis
7h 10m
1 stop
UVF3:10 pmCastries Hewanorra
Dec 4
UVF4:25 pmCastries Hewanorra
9h 14m
1 stop
STL11:39 pmLambert-St Louis
$730
Delta
Nov 23
STL6:00 amLambert-St Louis
7h 10m
1 stop
UVF3:10 pmCastries Hewanorra
Dec 4
UVF4:25 pmCastries Hewanorra
9h 14m
1 stop
STL11:39 pmLambert-St Louis
$760
Delta
Oct 30
STL6:00 amLambert-St Louis
7h 26m
1 stop
UVF2:26 pmCastries Hewanorra
Nov 6
UVF4:41 pmCastries Hewanorra
9h 07m
1 stop
STL11:48 pmLambert-St Louis
$765

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 July 21, 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

Wed 10/21

12:10 pm-2:15 pm

2 stops49h 05m

Castries Hewanorra

Sun 10/25

4:40 pm-3:26 pm

1 stop23h 46m

$519

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 8/24

2:40 pm-2:20 pm

1 stop22h 40m

Castries Hewanorra

Fri 8/28

3:15 pm-2:04 pm

1 stop23h 49m

$535

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 8/24

12:10 pm-2:20 pm

2 stops25h 10m

Castries Hewanorra

Fri 8/28

3:15 pm-2:04 pm

1 stop23h 49m

$538

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 8/24

2:40 pm-2:20 pm

1 stop22h 40m

Castries Hewanorra

Fri 8/28

3:15 pm-2:04 pm

1 stop23h 49m

$550
Quickest round-trip

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Sun 11/15

4:05 pm-4:40 pm

1 stop22h 35m

Castries Hewanorra

Fri 11/20

5:40 pm-3:26 pm

1 stop23h 46m

$558

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Thu 10/29

4:05 pm-3:40 pm

1 stop22h 35m

Castries Hewanorra

Fri 11/6

5:40 pm-3:26 pm

1 stop23h 46m

$560

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Wed 11/18

4:05 pm-4:40 pm

1 stop22h 35m

Castries Hewanorra

Sun 11/22

5:40 pm-3:26 pm

1 stop23h 46m

$590

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 8/24

12:10 pm-2:20 pm

2 stops25h 10m

Castries Hewanorra

Fri 8/28

3:15 pm-2:04 pm

1 stop23h 49m

$593

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Fri 9/11

8:55 am-7:00 pm

2 stops33h 05m

Castries George F. L. Charle

Sat 9/19

12:35 pm-2:00 pm

2 stops26h 25m

$922

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Sun 10/18

8:55 am-7:00 pm

2 stops33h 05m

Castries George F. L. Charle

Sat 10/24

3:45 pm-3:26 pm

2 stops48h 41m

$937

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 month to fly to Saint Lucia?

The month of July is, on average, the cheapest month to fly to Saint Lucia from St. Louis, with most prices found around $573. If you aren’t able to travel to Saint Lucia during the month of July, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $600.

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 10m

Direct flights

None
The fastest flight from St. Louis to Saint Lucia takes 7h 10m
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

Frequently asked questions about flying from St. Louis to Saint Lucia

  • 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
11,832 reviews
Search American Airlines flights
DeltaPriceFrom $600Free CancellationRating
7.8
8,473 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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