HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Simpson Bay

$492+ Cheap flights from St. Louis (STL) to Simpson Bay (SXM)

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 7/25. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SXM
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Simpson Bay 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 Simpson Bay

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Simpson Bay (SXM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 12, 2025.

Round-trip from

$492
(Mytrip)

Popular in

December

Cheapest in

August

Average price

$748
From Lambert-St Louis to Simpson Bay Princess Juliana
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($138 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($41 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 Simpson Bay

Cheapest flights from St. Louis to Simpson Bay
Explore the most affordable flight options available from St. Louis to Simpson Bay. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Mytrip deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/2510:47 amSTL - SXM
2 stops26h 13mSpirit Airlines
Fri 8/13:05 pmSXM - STL
1 stop24h 34mSpirit Airlines
Deal found 6/10$492
This Booking.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/97:37 pmSTL - SXM
1 stop17h 47mMultiple Airlines
Fri 11/145:15 pmSXM - STL
1 stop24h 11mMultiple Airlines
Deal found 6/11$496
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/206:00 amSTL - SXM
1 stop6h 56mDelta
Sun 8/243:21 pmSXM - STL
1 stop8h 53mDelta
Deal found 6/11$517
This American Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/195:28 amSTL - SXM
1 stop6h 51mAmerican Airlines
Tue 9/232:45 pmSXM - STL
2 stops22h 11mAmerican Airlines
Deal found 6/12$522

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Simpson Bay 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, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
Use the filters below to find and compare flights from St. Louis to Simpson Bay that are best for you.

Fly from

St. Louis

Fly to

Simpson Bay

Route

Depart

Return

Price

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Fri 7/25

10:47 am-2:00 pm

2 stops26h 13m

Simpson Bay Princess Juliana

Fri 8/1

3:05 pm-2:39 pm

1 stop24h 34m

$492

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 11/9

7:37 pm-3:24 pm

1 stop17h 47m

Simpson Bay Princess Juliana

Fri 11/14

5:15 pm-3:26 pm

1 stop24h 11m

$496

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Wed 8/20

6:00 am-1:56 pm

1 stop6h 56m

Simpson Bay Princess Juliana

Sun 8/24

3:21 pm-11:14 pm

1 stop8h 53m

$517

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Fri 9/19

5:28 am-1:19 pm

1 stop6h 51m

Simpson Bay Princess Juliana

Tue 9/23

2:45 pm-11:56 am

2 stops22h 11m

$522

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Best time to book a flight from St. Louis to Simpson Bay

Have a flexible travel schedule? Discover the best time to fly to Simpson Bay 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 Simpson Bay

How far ahead should I book a flight from St. Louis to Simpson Bay?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Simpson Bay. Price data was last updated on June 9, 2025.

The best time to book flights from St. Louis to Simpson Bay is 31 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, September is the cheapest month in which you can book a flight from St. Louis to Simpson Bay (average of $459). Flying from St. Louis to Simpson Bay in March is currently the most expensive (average of $657). 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.

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

Find hourly flight availability from St. Louis to Simpson Bay. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

It’s typically best to fly out from St. Louis to Simpson Bay in the afternoon. Doing so could potentially save you 13% on the flight price compared to flying at noon, which is usually more expensive.

Reviews of airlines servicing Simpson Bay

Get insights into the airlines that provide service to Simpson Bay. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Simpson Bay. Reviews last updated June 12, 2025.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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!
Spirit Airlines
6.3
Okay
8,052 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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

Find useful and relevant information for your journey from St. Louis to Simpson Bay. 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 Simpson Bay round-trip?

    Flying on Spirit Airlines is currently your cheapest option to Simpson Bay, with prices starting at $492. Additional round-trip tickets that might be worth considering are offered by Delta and American Airlines, with the lowest prices starting at $517 and $527, respectively. Spirit Airlines is 32% cheaper than the average price of flights available within the next 90 days to this destination.

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

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

  • How can I find direct flights from St. Louis to Simpson Bay?

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

  • Can I find deals for business class flights from St. Louis to Simpson Bay?

    Yes. Cheapflights offers flight deals from St. Louis to Simpson Bay 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 Simpson Bay?

    Currently, September is the cheapest month in which you can book a flight from St. Louis to Simpson Bay (average of $459). Flying from St. Louis to Simpson Bay in March is currently the most expensive (average of $657). 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

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

Alternative routes for St. Louis to Simpson Bay

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Simpson Bay flights

Top 2 airlines flying from St. Louis to Simpson Bay

Discover the top 2 airlines that operate flights from St. Louis to Simpson Bay. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$474Average$720FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$513Average$679FlexibilityNo cancel feeOn-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.