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Simpson Bay

$221+ Cheap flights from St. Louis (STL) to Simpson Bay (SXM)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SXM
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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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 September 11, 2025.

Round-trip from

$370
(Vliegwinkel)

One-way from

$221
(ubfly)

Popular in

December

Cheapest in

August

Average price

$674
From Lambert-St Louis to Simpson Bay Princess Juliana
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One-way flight from Lambert-St Louis to Simpson Bay Princess Juliana
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Highest demand for flights based on searches. 9% potential increase in price ($75 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 11, 2025.

This Vliegwinkel deal was found by Cheapflights users on 9/9. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/304:05 pmSTL - SXM
1 stop21h 55mAir Canada
Sat 11/85:00 pmSXM - STL
1 stop24h 29mAir Canada
Deal found 9/9$370
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3010:57 amSTL - SXM
1 stop26h 03mMultiple Airlines
Sat 11/84:28 pmSXM - STL
2 stops19h 44mMultiple Airlines
Deal found 9/9$423
This Delta deal was found by Cheapflights users on 9/9. 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.
Sun 10/56:01 amSTL - SXM
1 stop6h 49mDelta
Mon 10/133:14 pmSXM - STL
1 stop9h 27mDelta
Deal found 9/9$517
This American Airlines deal was found by Cheapflights users on 9/9. 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.
Sun 10/55:28 amSTL - SXM
1 stop6h 51mAmerican Airlines
Wed 10/152:40 pmSXM - STL
2 stops20h 44mAmerican Airlines
Deal found 9/9$522
This American Airlines deal was found by Cheapflights users on 9/9. 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.
Thu 10/305:53 pmSTL - SXM
2 stops20h 22mAmerican Airlines
Sat 11/85:24 pmSXM - STL
2 stops19h 15mAmerican Airlines
Deal found 9/9$524
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/267:54 pmSTL - SXM
2 stops18h 21mAmerican Airlines
Sun 11/23:20 pmSXM - STL
1 stop9h 32mAmerican Airlines
Deal found 9/11$527
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/86:03 pmSTL - SXM
2 stops20h 19mAmerican Airlines
Wed 11/195:24 pmSXM - STL
2 stops17h 03mAmerican Airlines
Deal found 9/10$555
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1812:47 pmSTL - SXM
2 stops23h 32mAmerican Airlines
Mon 9/222:20 pmSXM - STL
1 stop10h 39mAmerican Airlines
Deal found 9/10$562
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/510:57 amSTL - SXM
1 stop26h 03mMultiple Airlines
Tue 10/1411:40 amSXM - STL
2 stops47h 22mMultiple Airlines
Deal found 9/9$617

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 September 11, 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

Tue 1/6

4:05 pm-4:00 pm

1 stop21h 55m

Simpson Bay Princess Juliana

Tue 1/13

3:40 pm-3:29 pm

2 stops25h 49m

$495

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 10/26

6:00 am-1:49 pm

1 stop6h 49m

Simpson Bay Princess Juliana

Sun 11/2

4:14 pm-9:38 pm

1 stop7h 24m

$517

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 10/5

6:01 am-1:50 pm

1 stop6h 49m

Simpson Bay Princess Juliana

Mon 10/13

3:14 pm-11:41 pm

1 stop9h 27m

$517

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 10/26

7:54 pm-3:15 pm

2 stops18h 21m

Simpson Bay Princess Juliana

Sun 11/2

5:24 pm-9:35 am

2 stops18h 11m

$527

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sat 11/8

6:03 pm-4:22 pm

2 stops20h 19m

Simpson Bay Princess Juliana

Wed 11/19

5:24 pm-8:27 am

2 stops17h 03m

$555

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Tue 1/6

5:54 pm-3:20 pm

2 stops19h 26m

Simpson Bay Princess Juliana

Tue 1/13

3:20 pm-8:14 am

2 stops18h 54m

$588

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Tue 1/13

5:54 pm-3:20 pm

2 stops19h 26m

Simpson Bay Princess Juliana

Fri 1/23

4:15 pm-8:14 am

2 stops17h 59m

$588

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Wed 9/17

7:55 pm-2:00 pm

3 stops41h 05m

$346

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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 August 29, 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 $652). 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 September 11, 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.

How much does it cost to fly round-trip from St. Louis to Simpson Bay?

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 September 11, 2025.
Read reviews from past customers who have flown Delta and American Airlines from St. Louis to Simpson Bay. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

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
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

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
7,960 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

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.

  • How long is the flight from St. Louis to Simpson Bay?

    There are many flights that can get you from St. Louis to Simpson Bay in 6h 49m. Fly via Air Canada, Delta, or American Airlines to get the fastest option. The distance from St. Louis to Simpson Bay is about 2172 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from St. Louis to Simpson Bay round-trip?

    Flying on Delta is currently your cheapest option to Simpson Bay, with prices starting at $497. Another option worth looking into is American Airlines, starting at $540 round trip. Delta is 30% 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 $652). 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

Traveling to a place near Simpson Bay?

Book flights to Simpson Bay if you plan to visit one of these locations
Philipsburg

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$497Average$702FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$540Average$708FlexibilityNo cancel feeOn-time71%

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