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

Flying on American Airlines is currently your cheapest option to Simpson Bay, with prices starting at $564. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at $598 and $749, respectively. American Airlines is 19% cheaper than the average price of flights available within the next 90 days to this destination.

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

Travelers seeking maximum savings on their St. Louis to Simpson Bay flight should consider departing on Monday afternoons when fares are most often at their lowest. Saturday afternoons 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 Simpson Bay?

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 30% on your flight compared to booking on days when demand is much higher.

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

Travelers have found it’s best to book a flight 32 days in advance to save up to 123% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 32 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from St. Louis to Simpson Bay 1-2 weeks in advance for as low as $797, or $943 for flights within the next 24 hours.

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

August can be a great time to fly to Simpson Bay from St. Louis with a flight ticket averaging about $704. Cheapflights users have found deals in the month of August for as cheap as $440. The most expensive prices can be found in the month of December.

Most accurate provider : When it comes to deals on St. Louis-Simpson Bay flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Simpson Bay flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Simpson Bay flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-Simpson Bay flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Simpson Bay flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

$539+ Flights from St. Louis to Simpson Bay

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1. Tell us where you want to go

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Cheap flight deals from St. Louis to Simpson Bay

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$539 (Kiwi.com)
Popular in	December
Cheapest in	August
Average price	$811

Provider with most accurate pricing for Lambert-St Louis-Simpson Bay Princess Juliana flight deals.

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Provider most trusted by Cheapflights users for Lambert-St Louis-Simpson Bay Princess Juliana flights.

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From Lambert-St Louis to Simpson Bay Princess Juliana

Search Deals

Highest demand for flights based on searches. 14% potential increase in price ($118 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease ($40 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 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 March 28, 2025.

Sun 5/1110:10 amSTL - SXM

1 stop26h 50mMultiple Airlines

Sun 5/1812:18 pmSXM - STL

2 stops36h 48mMultiple Airlines

Deal found 3/27

$539

Sun 5/117:30 pmSTL - SXM

2 stops16h 45mAmerican Airlines

Sun 5/184:40 pmSXM - STL

2 stops21h 12mAmerican Airlines

Deal found 3/27

$564

Wed 8/206:00 amSTL - SXM

1 stop6h 48mDelta

Sun 8/243:10 pmSXM - STL

1 stop9h 29mDelta

Deal found 3/27

$598

Mon 4/284:44 pmSTL - SXM

1 stop18h 45mUnited Airlines

Fri 5/21:35 pmSXM - STL

1 stop11h 11mUnited Airlines

Deal found 3/27

$749

Best flights from St. Louis to Simpson Bay
Discover carefully curated flight deals from St. Louis to Simpson Bay that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 28, 2025.

Sun 5/1110:10 amSTL - SXM

1 stop26h 50mMultiple Airlines

Sun 5/1812:18 pmSXM - STL

2 stops36h 48mMultiple Airlines

Deal found 3/27

$539

Sun 5/117:30 pmSTL - SXM

2 stops16h 45mAmerican Airlines

Sun 5/184:40 pmSXM - STL

2 stops21h 12mAmerican Airlines

Deal found 3/27

$564

Wed 8/206:00 amSTL - SXM

1 stop6h 48mDelta

Sun 8/243:10 pmSXM - STL

1 stop9h 29mDelta

Deal found 3/27

$598

Mon 4/284:44 pmSTL - SXM

1 stop18h 45mUnited Airlines

Fri 5/21:35 pmSXM - STL

1 stop11h 11mUnited Airlines

Deal found 3/27

$749

Last-minute flights from St. Louis to Simpson Bay
Discover last-minute flight deals from St. Louis to Simpson Bay. Data last updated March 28, 2025 and is based on user searches.

Mon 3/315:24 pmSTL - SXM

2 stops37h 48mMultiple Airlines

Wed 4/23:05 pmSXM - STL

1 stop27h 47mMultiple Airlines

Deal found 3/27

$876

Mon 3/316:00 amSTL - SXM

1 stop7h 01mDelta

Wed 4/21:40 pmSXM - STL

1 stop10h 51mDelta

Deal found 3/27

$993

Fri 4/185:35 amSTL - SXM

1 stop7h 39mAmerican Airlines

Tue 4/224:25 pmSXM - STL

2 stops21h 28mAmerican Airlines

Deal found 3/27

$757

Mon 4/284:44 pmSTL - SXM

1 stop18h 45mUnited Airlines

Fri 5/21:35 pmSXM - STL

1 stop11h 11mUnited Airlines

Deal found 3/27

$749

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 5/11

10:10 am-2:00 pm

1 stop26h 50m

Simpson Bay Princess Juliana

Sun 5/18

12:18 pm-12:06 am

2 stops36h 48m

$539

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 5/11

7:30 pm-1:15 pm

2 stops16h 45m

Simpson Bay Princess Juliana

Sun 5/18

4:40 pm-12:52 pm

2 stops21h 12m

$564

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Wed 8/20

6:00 am-1:48 pm

1 stop6h 48m

Simpson Bay Princess Juliana

Sun 8/24

3:10 pm-11:39 pm

1 stop9h 29m

$598

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Mon 4/28

4:44 pm-12:29 pm

1 stop18h 45m

Simpson Bay Princess Juliana

Fri 5/2

1:35 pm-11:46 pm

1 stop11h 11m

$749

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Compare providers for flights from St. Louis to Simpson Bay

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Simpson Bay in March.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-Simpson Bay flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Simpson Bay flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Simpson Bay flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-Simpson Bay flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Simpson Bay flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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?

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 July is currently the most expensive (average of $679). 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?

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

Delta

8.0

Very good

7,897 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

7,897 reviews

Delta

8.0

Very good

7,897 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

8,603 reviews

Delta

8.0

Very good

7,897 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,897 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines flying from St. Louis to Simpson Bay round-trip?
Flying on American Airlines is currently your cheapest option to Simpson Bay, with prices starting at $564. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at $598 and $749, respectively. American Airlines is 19% 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 July is currently the most expensive (average of $679). 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

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Top 2 airlines flying from St. Louis to Simpson Bay

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$469	Average$675	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$474	Average$712	FlexibilityNo cancel fee	On-timeN/A

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$539+ 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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.

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

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Simpson Bay

Cheapest flights from St. Louis to Simpson BayExplore 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 March 28, 2025.

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 March 28, 2025.

Cheapflights Fare Finder

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

Compare providers for flights from St. Louis to Simpson Bay

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Simpson Bay in March.

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.

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 March 21, 2025.

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

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 March 28, 2025.

Reviews of airlines servicing Simpson Bay

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?

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

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

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

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

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.

Top 2 airlines flying from St. Louis to Simpson Bay

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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 March 28, 2025.