What are the cheapest airlines flying from St. Louis to Castries round-trip?

Our cheapest airline available from St. Louis to Castries is Air Canada. Our recent data shows that you can find tickets from as low as $528 on this airline. Additional options worth looking into are American Airlines and Delta, starting at $565 and $575 round-trip. These flights start at 28% lower than the current average price 3 months from now.

What is the cheapest day to fly from St. Louis to Castries?

Travelers seeking maximum savings on their St. Louis to Castries flight should consider departing on Tuesday mornings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest day to fly round-trip from St. Louis to Castries?

Departing on a Monday is a good option for securing a great price. You can expect to save up to 32% when planning your travel around this day of the week.

What is the cheapest month to fly from St. Louis to Castries?

August can be a great time to fly to Castries from St. Louis with a flight ticket averaging about $807. Cheapflights users have found deals in the month of August for as cheap as $514. The most expensive prices can be found in the month of April.

What is the cheapest time of day to fly from STL to UVF?

One of the essential ways to save on airfare from St. Louis to Castries is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 14% on airfare.

Can I find deals for flights from St. Louis to Castries that include hotel bookings?

Yes. In addition to deals on St. Louis to Castries flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Castries?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Castries.

Can I find deals for business class flights from St. Louis to Castries?

Yes. Cheapflights offers flight deals from St. Louis to Castries by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$528+ Flights from St. Louis to Castries

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from St. Louis to Castries with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from St. Louis to Castries

Round-trip from	$528 (Air Canada)
Popular in	December
Cheapest in	February
Average price	$911

From Lambert-St Louis to Castries Hewanorra

Search Deals

Highest demand for flights based on searches. 4% potential increase in price ($34 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in June 2025

Search Deals

Find flight deals from St. Louis to Castries

Cheapest flights from St. Louis to Castries
Explore the most affordable flight options available from St. Louis to Castries. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 5, 2025.

Mon 9/151:30 pmSTL - UVF

2 stops23h 45mAir Canada

Tue 9/233:10 pmUVF - STL

1 stop25h 08mAir Canada

Deal found 6/4

$528

Wed 10/295:34 amSTL - UVF

1 stop7h 16mAmerican Airlines

Tue 11/45:15 pmUVF - STL

1 stop17h 00mAmerican Airlines

Deal found 6/2

$565

Wed 9/176:00 amSTL - UVF

1 stop7h 23mDelta

Thu 9/253:38 pmUVF - STL

1 stop9h 01mDelta

Deal found 6/4

$575

Thu 6/196:36 pmSTL - UVF

3 stops18h 39mMultiple Airlines

Sun 6/222:35 pmUVF - STL

2 stops30h 23mMultiple Airlines

Deal found 6/4

$698

Best flights from St. Louis to Castries
Discover carefully curated flight deals from St. Louis to Castries that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 5, 2025.

Mon 9/151:30 pmSTL - UVF

2 stops23h 45mAir Canada

Tue 9/233:10 pmUVF - STL

1 stop25h 08mAir Canada

Deal found 6/4

$528

Wed 10/295:34 amSTL - UVF

1 stop7h 16mAmerican Airlines

Tue 11/45:15 pmUVF - STL

1 stop17h 00mAmerican Airlines

Deal found 6/2

$565

Wed 9/176:00 amSTL - UVF

1 stop7h 23mDelta

Thu 9/253:38 pmUVF - STL

1 stop9h 01mDelta

Deal found 6/4

$575

Thu 6/196:36 pmSTL - UVF

3 stops18h 39mMultiple Airlines

Sun 6/222:35 pmUVF - STL

2 stops30h 23mMultiple Airlines

Deal found 6/4

$698

Last-minute flights from St. Louis to Castries
Discover last-minute flight deals from St. Louis to Castries. Data last updated June 5, 2025 and is based on user searches.

Thu 6/196:36 pmSTL - UVF

3 stops18h 39mMultiple Airlines

Sun 6/222:35 pmUVF - STL

2 stops30h 23mMultiple Airlines

Deal found 6/4

$698

Fri 7/45:25 amSTL - UVF

1 stop7h 20mAmerican Airlines

Fri 7/113:20 pmUVF - STL

2 stops22h 23mAmerican Airlines

Deal found 6/4

$750

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Castries that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Mon 9/15

1:30 pm-2:15 pm

2 stops23h 45m

Castries Hewanorra

Tue 9/23

3:10 pm-3:18 pm

1 stop25h 08m

$528

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Wed 10/29

5:34 am-1:50 pm

1 stop7h 16m

Castries Hewanorra

Tue 11/4

5:15 pm-8:15 am

1 stop17h 00m

$565

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Wed 9/17

6:00 am-2:23 pm

1 stop7h 23m

Castries Hewanorra

Thu 9/25

3:38 pm-11:39 pm

1 stop9h 01m

$575

St. LouisCastries

STL - UVF

STLUVF

Lambert-St Louis

Thu 6/19

6:36 pm-2:15 pm

3 stops18h 39m

Castries Hewanorra

Sun 6/22

2:35 pm-7:58 pm

2 stops30h 23m

$698

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/4

Best time to book a flight from St. Louis to Castries

Have a flexible travel schedule? Discover the best time to fly to Castries from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Castries

What is the cheapest month to book a flight from St. Louis to Castries?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Castries (average of $556). Flying from St. Louis to Castries in December is currently the most expensive (average of $730). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Castries

Delta

8.0

Very good

7,956 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,956 reviews

Delta

8.0

Very good

7,956 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,956 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Air Canada

7.1

Good

9,502 reviews

Delta

8.0

Very good

7,956 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from St. Louis to Castries round-trip?
Our cheapest airline available from St. Louis to Castries is Air Canada. Our recent data shows that you can find tickets from as low as $528 on this airline. Additional options worth looking into are American Airlines and Delta, starting at $565 and $575 round-trip. These flights start at 28% lower than the current average price 3 months from now.
Can I find deals for flights from St. Louis to Castries that include hotel bookings?
Yes. In addition to deals on St. Louis to Castries flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Castries?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Castries.
Can I find deals for business class flights from St. Louis to Castries?
Yes. Cheapflights offers flight deals from St. Louis to Castries by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Castries?
Currently, January is the cheapest month in which you can book a flight from St. Louis to Castries (average of $556). Flying from St. Louis to Castries in December is currently the most expensive (average of $730). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for St. Louis to Castries

Kansas City to Castries flights

Top 2 airlines flying from St. Louis to Castries

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$444	Average$646	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$548	Average$747	FlexibilityNo cancel fee	On-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$528+ Cheap flights from St. Louis (STL) to Castries (UVF)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Castries with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to Castries

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Castries

Cheapest flights from St. Louis to CastriesExplore the most affordable flight options available from St. Louis to Castries. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 5, 2025.

Explore the most affordable flight options available from St. Louis to Castries. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 5, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Castries that are best for you.

Best time to book a flight from St. Louis to Castries

Have a flexible travel schedule? Discover the best time to fly to Castries from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Castries

What is the cheapest month to book a flight from St. Louis to Castries?

Reviews of airlines servicing Castries

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Castries. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from St. Louis to Castries round-trip?

Can I find deals for flights from St. Louis to Castries that include hotel bookings?

How can I find direct flights from St. Louis to Castries?

Can I find deals for business class flights from St. Louis to Castries?

What is the cheapest month to book a flight from St. Louis to Castries?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Castries

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from St. Louis to Castries

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from St. Louis to Castries
Explore the most affordable flight options available from St. Louis to Castries. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 5, 2025.