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Cheap flights from St. Louis to Saint Lucia from $604

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 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 Saint Lucia

Cheap round-trip flights

Enter your travel dates to find the best prices.
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
$604Air 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
$606Air 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
$608Air 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
$610Air 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
$614Air 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
$618Air 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
$621Air 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
$623Air Canada
Mon, Aug 10 - Tue, Aug 18
Multiple Airlines Logo
2:15 pm - 7:00 pm
STL
-
SLU
27h 45m
2 stops
Multiple Airlines Logo
3:45 pm - 12:06 pm
SLU
-
STL
45h 21m
2 stops
$1,028Multiple Airlines
Fri, Jun 5 - Fri, Jun 12
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
$1,085Multiple Airlines
Fri, Sep 18 - Fri, Sep 25

American Airlines flights from St. Louis to Saint Lucia

Our best American Airlines deals on St. Louis to Saint Lucia flight tickets
American Airlines
Sep 15
STL5:33 amLambert-St Louis
7h 17m
1 stop
UVF1:50 pmCastries Hewanorra
Sep 22
UVF4:00 pmCastries Hewanorra
8h 12m
1 stop
STL11:12 pmLambert-St Louis
$710
American Airlines
Sep 15
STL6:31 pmLambert-St Louis
18h 19m
2 stops
UVF1:50 pmCastries Hewanorra
Sep 22
UVF4:00 pmCastries Hewanorra
18h 27m
2 stops
STL9:27 amLambert-St Louis
$715
American Airlines
Sep 16
STL5:33 amLambert-St Louis
7h 17m
1 stop
UVF1:50 pmCastries Hewanorra
Sep 23
UVF4:00 pmCastries Hewanorra
17h 02m
2 stops
STL8:02 amLambert-St Louis
$720

Air Canada flights from St. Louis to Saint Lucia

Our best Air Canada deals on St. Louis to Saint Lucia flight tickets
Air Canada
Aug 10
STL2:40 pmLambert-St Louis
22h 40m
1 stop
UVF2:20 pmCastries Hewanorra
Aug 18
UVF3:15 pmCastries Hewanorra
23h 47m
1 stop
STL2:02 pmLambert-St Louis
$604
Air Canada
Aug 10
STL2:40 pmLambert-St Louis
22h 40m
1 stop
UVF2:20 pmCastries Hewanorra
Aug 18
UVF3:15 pmCastries Hewanorra
23h 47m
1 stop
STL2:02 pmLambert-St Louis
$606
Air Canada
Aug 10
STL12:10 pmLambert-St Louis
25h 10m
2 stops
UVF2:20 pmCastries Hewanorra
Aug 18
UVF3:15 pmCastries Hewanorra
23h 47m
1 stop
STL2:02 pmLambert-St Louis
$608

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 May 7, 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
Quickest round-trip

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

$604

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

$606

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

$608

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

$610

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

$614

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

$618

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

$621

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

$623

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Fri 6/5

2:15 pm-7:00 pm

2 stops27h 45m

Castries George F. L. Charle

Fri 6/12

3:45 pm-12:06 pm

2 stops45h 21m

$1,028

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Fri 9/18

8:55 am-7:00 pm

2 stops33h 05m

Castries George F. L. Charle

Fri 9/25

12:35 pm-2:00 pm

2 stops26h 25m

$1,085

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 December is, on average, the cheapest month to fly to Saint Lucia from St. Louis, with most prices found around $565. If you aren’t able to travel to Saint Lucia during the month of December, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $565.

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 09m

Direct flights

None
The fastest flight from St. Louis to Saint Lucia takes 7h 09m
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
11,669 reviews
Search American Airlines flights
DeltaPriceFrom $600Free CancellationRating
7.9
8,459 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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Popular flights according to clicks in the last 7 days on momondo
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