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?

As of June 2026, there are 2 operators available to choose from 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.

$372 Cheap Flights from St. Louis to Saint Lucia in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Saint Lucia

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:40 pm - 2:20 pm

STL

UVF

22h 40m

1 stop

3:15 pm - 2:04 pm

UVF

STL

23h 49m

1 stop

$552Air Canada

Mon, Aug 24 - Fri, Aug 28

12:10 pm - 2:20 pm

STL

UVF

25h 10m

2 stops

3:15 pm - 2:04 pm

UVF

STL

23h 49m

1 stop

$555Air Canada

Mon, Aug 24 - Fri, Aug 28

12:10 pm - 2:20 pm

STL

UVF

25h 10m

2 stops

3:15 pm - 6:42 pm

UVF

STL

28h 27m

2 stops

$568Air Canada

Mon, Aug 24 - Fri, Aug 28

2:40 pm - 2:15 pm

STL

UVF

22h 35m

1 stop

4:25 pm - 3:30 pm

UVF

STL

24h 05m

1 stop

$579Air Canada

Thu, Oct 22 - Mon, Oct 26

12:10 pm - 2:20 pm

STL

UVF

25h 10m

2 stops

3:15 pm - 2:02 pm

UVF

STL

23h 47m

1 stop

$581Air Canada

Mon, Aug 10 - Tue, Aug 18

12:10 pm - 2:15 pm

STL

UVF

25h 05m

2 stops

4:25 pm - 3:30 pm

UVF

STL

24h 05m

1 stop

$582Air Canada

Thu, Oct 22 - Mon, Oct 26

8:55 am - 2:20 pm

STL

UVF

28h 25m

1 stop

3:15 pm - 2:02 pm

UVF

STL

23h 47m

1 stop

$588Air Canada

Mon, Aug 10 - Tue, Aug 18

4:15 pm - 4:25 pm

STL

UVF

22h 10m

1 stop

5:25 pm - 3:30 pm

UVF

STL

24h 05m

1 stop

$602Air Canada

Thu, Nov 5 - Thu, Nov 12

8:55 am - 7:00 pm

STL

SLU

33h 05m

2 stops

3:45 pm - 2:02 pm

SLU

STL

47h 17m

2 stops

$1,265Multiple Airlines

Sun, Jul 12 - Thu, Jul 16

8:55 am - 8:10 am

STL

SLU

22h 15m

2 stops

12:35 pm - 2:04 pm

SLU

STL

26h 29m

2 stops

$1,341Multiple Airlines

Mon, Aug 24 - Fri, Aug 28

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Delta flights from St. Louis to Saint Lucia

Our best Delta deals on St. Louis to Saint Lucia flight tickets

Delta

Aug 19

STL6:00 amLambert-St Louis

7h 14m

1 stop

UVF2:14 pmCastries Hewanorra

Aug 26

UVF3:34 pmCastries Hewanorra

8h 47m

1 stop

STL11:21 pmLambert-St Louis

$710

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

$752

Delta

Oct 2

STL6:00 amLambert-St Louis

7h 12m

1 stop

UVF2:12 pmCastries Hewanorra

Oct 12

UVF3:41 pmCastries Hewanorra

8h 58m

1 stop

STL11:39 pmLambert-St Louis

$810

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 19

STL5:00 amLambert-St Louis

7h 49m

1 stop

UVF1:49 pmCastries Hewanorra

Aug 26

UVF2:49 pmCastries Hewanorra

23h 13m

2 stops

STL1:02 pmLambert-St Louis

$720

American Airlines

Nov 14

STL2:08 pmLambert-St Louis

21h 13m

2 stops

UVF1:21 pmCastries Hewanorra

Nov 20

UVF4:50 pmCastries Hewanorra

19h 25m

2 stops

STL10:15 amLambert-St Louis

$744

American Airlines

Oct 30

STL5:30 amLambert-St Louis

6h 55m

1 stop

UVF1:25 pmCastries Hewanorra

Nov 6

UVF4:04 pmCastries Hewanorra

10h 01m

1 stop

STL12:05 amLambert-St Louis

$745

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

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

$552

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

$555

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-6:42 pm

2 stops28h 27m

$568

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Thu 10/22

2:40 pm-2:15 pm

1 stop22h 35m

Castries Hewanorra

Mon 10/26

4:25 pm-3:30 pm

1 stop24h 05m

$579

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

$581

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Thu 10/22

12:10 pm-2:15 pm

2 stops25h 05m

Castries Hewanorra

Mon 10/26

4:25 pm-3:30 pm

1 stop24h 05m

$582

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

$588

Quickest round-trip

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Thu 11/5

4:15 pm-4:25 pm

1 stop22h 10m

Castries Hewanorra

Thu 11/12

5:25 pm-3:30 pm

1 stop24h 05m

$602

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Sun 7/12

8:55 am-7:00 pm

2 stops33h 05m

Castries George F. L. Charle

Thu 7/16

3:45 pm-2:02 pm

2 stops47h 17m

$1,265

St. LouisCastries

STL - SLU

STLSLU

Lambert-St Louis

Mon 8/24

8:55 am-8:10 am

2 stops22h 15m

Castries George F. L. Charle

Fri 8/28

12:35 pm-2:04 pm

2 stops26h 29m

$1,341

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first

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 August is, on average, the cheapest month to fly to Saint Lucia from St. Louis, with most prices found around $505. If you aren’t able to travel to Saint Lucia during the month of August, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $573.

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?
As of June 2026, there are 2 operators available to choose from 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 Airlines	PriceFrom $575	Free Cancellation	Rating 7.1 11,756 reviews		Search American Airlines flights
Delta	PriceFrom $600	Free Cancellation	Rating 7.8 8,440 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.

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Flights to Castriesfrom $541

Cheap flights from St. Louis to Saint Lucia from $372

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 9/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Delta flights from St. Louis to Saint Lucia

Our best Delta deals on St. Louis to Saint Lucia flight tickets

American Airlines flights from St. Louis to Saint Lucia

Our best American Airlines deals on St. Louis to Saint Lucia flight tickets

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

What is the cheapest month to fly 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

Direct flights

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

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

Why use momondo?

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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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

St. Louis flight routes

According to popular flight searches on momondo this year

Saint Lucia flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Saint Lucia

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Saint Lucia

List of cabin classes available on flights landing in Saint Lucia. Availability may vary depending on flight origin and airline.

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According to popular flight searches on momondo this year