Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Simpson Bay from $450

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Simpson Bay departing on 1/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to Simpson Bay

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:42 am - 3:10 pmSTL-SXM
26h 28m2 stops
Multiple Airlines Logo
4:28 pm - 11:01 amSXM-STL
20h 33m1 stop
$450Multiple Airlines
Find Deal
Sun, Jan 18 - Sat, Jan 31
Multiple Airlines Logo
4:05 pm - 4:00 pmSTL-SXM
21h 55m1 stop
Multiple Airlines Logo
4:28 pm - 1:53 pmSXM-STL
23h 25m1 stop
$451Multiple Airlines
Find Deal
Sun, Jan 18 - Fri, Jan 23
Multiple Airlines Logo
10:42 am - 3:10 pmSTL-SXM
26h 28m2 stops
Multiple Airlines Logo
4:28 pm - 1:53 pmSXM-STL
23h 25m1 stop
$461Multiple Airlines
Find Deal
Sun, Jan 18 - Fri, Jan 23
Multiple Airlines Logo
4:05 pm - 4:00 pmSTL-SXM
21h 55m1 stop
Multiple Airlines Logo
4:28 pm - 11:01 amSXM-STL
20h 33m1 stop
$481Multiple Airlines
Find Deal
Sun, Jan 4 - Sat, Jan 10
Air Canada Logo
4:05 pm - 4:00 pmSTL-SXM
21h 55m1 stop
Air Canada Logo
3:40 pm - 3:29 pmSXM-STL
25h 49m2 stops
$521Air Canada
Find Deal
Thu, Dec 11 - Thu, Dec 18
Air Canada Logo
4:05 pm - 2:40 pmSTL-SXM
44h 35m2 stops
Air Canada Logo
5:00 pm - 3:29 pmSXM-STL
24h 29m1 stop
$540Air Canada
Find Deal
Tue, Jan 13 - Fri, Jan 23
American Airlines Logo
7:05 pm - 12:50 pmSTL-SXM
16h 45m1 stop
American Airlines Logo
2:25 pm - 9:35 pmSXM-STL
8h 10m1 stop
$583American Airlines
Find Deal
Sun, Apr 5 - Fri, Apr 10
American Airlines Logo
5:56 pm - 4:33 pmSTL-SXM
20h 37m2 stops
American Airlines Logo
3:10 pm - 9:22 amSXM-STL
19h 12m2 stops
$588American Airlines
Find Deal
Tue, Mar 3 - Fri, Mar 13
Delta Logo
6:00 am - 2:56 pmSTL-SXM
6h 56m1 stop
Delta Logo
1:45 pm - 11:40 pmSXM-STL
11h 55m1 stop
$635Delta
Find Deal
Sun, Feb 22 - Wed, Mar 4
Delta Logo
6:00 am - 2:56 pmSTL-SXM
6h 56m1 stop
Delta Logo
5:16 pm - 11:40 pmSXM-STL
8h 24m1 stop
$660Delta
Find Deal
Sun, Feb 22 - Sat, Mar 7

Air Canada flights from St. Louis to Simpson Bay

Our best Air Canada deals on St. Louis to Simpson Bay flight tickets
Air Canada
Dec 11
STL4:05 pmLambert-St Louis
21h 55m
1 stop
SXM4:00 pmSimpson Bay Princess Juliana
Dec 18
SXM3:40 pmSimpson Bay Princess Juliana
25h 49m
2 stops
STL3:29 pmLambert-St Louis
$521
Find similar
Air Canada
Jan 13
STL4:05 pmLambert-St Louis
44h 35m
2 stops
SXM2:40 pmSimpson Bay Princess Juliana
Jan 23
SXM5:00 pmSimpson Bay Princess Juliana
24h 29m
1 stop
STL3:29 pmLambert-St Louis
$540
Find similar
Air Canada
Mar 3
STL4:05 pmLambert-St Louis
21h 55m
1 stop
SXM4:00 pmSimpson Bay Princess Juliana
Mar 13
SXM4:00 pmSimpson Bay Princess Juliana
24h 29m
1 stop
STL3:29 pmLambert-St Louis
$554
Find similar

American Airlines flights from St. Louis to Simpson Bay

Our best American Airlines deals on St. Louis to Simpson Bay flight tickets
American Airlines
Apr 5
STL7:05 pmLambert-St Louis
16h 45m
1 stop
SXM12:50 pmSimpson Bay Princess Juliana
Apr 10
SXM2:25 pmSimpson Bay Princess Juliana
8h 10m
1 stop
STL9:35 pmLambert-St Louis
$583
Find similar
American Airlines
Mar 3
STL5:56 pmLambert-St Louis
20h 37m
2 stops
SXM4:33 pmSimpson Bay Princess Juliana
Mar 13
SXM3:10 pmSimpson Bay Princess Juliana
19h 12m
2 stops
STL9:22 amLambert-St Louis
$588
Find similar
American Airlines
Jan 21
STL6:02 pmLambert-St Louis
16h 56m
1 stop
SXM12:58 pmSimpson Bay Princess Juliana
Jan 28
SXM5:33 pmSimpson Bay Princess Juliana
8h 26m
1 stop
STL11:59 pmLambert-St Louis
$608
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated October 28, 2025.
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 1/18

10:42 am-3:10 pm

2 stops26h 28m

Simpson Bay Princess Juliana

Sat 1/31

4:28 pm-11:01 am

1 stop20h 33m

$450

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 1/18

4:05 pm-4:00 pm

1 stop21h 55m

Simpson Bay Princess Juliana

Fri 1/23

4:28 pm-1:53 pm

1 stop23h 25m

$451

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 1/18

10:42 am-3:10 pm

2 stops26h 28m

Simpson Bay Princess Juliana

Fri 1/23

4:28 pm-1:53 pm

1 stop23h 25m

$461

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 1/4

4:05 pm-4:00 pm

1 stop21h 55m

Simpson Bay Princess Juliana

Sat 1/10

4:28 pm-11:01 am

1 stop20h 33m

$481

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Thu 12/11

4:05 pm-4:00 pm

1 stop21h 55m

Simpson Bay Princess Juliana

Thu 12/18

3:40 pm-3:29 pm

2 stops25h 49m

$521

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Tue 1/13

4:05 pm-2:40 pm

2 stops44h 35m

Simpson Bay Princess Juliana

Fri 1/23

5:00 pm-3:29 pm

1 stop24h 29m

$540

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 4/5

7:05 pm-12:50 pm

1 stop16h 45m

Simpson Bay Princess Juliana

Fri 4/10

2:25 pm-9:35 pm

1 stop8h 10m

$583

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Tue 3/3

5:56 pm-4:33 pm

2 stops20h 37m

Simpson Bay Princess Juliana

Fri 3/13

3:10 pm-9:22 am

2 stops19h 12m

$588

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 2/22

6:00 am-2:56 pm

1 stop6h 56m

Simpson Bay Princess Juliana

Wed 3/4

1:45 pm-11:40 pm

1 stop11h 55m

$635

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 2/22

6:00 am-2:56 pm

1 stop6h 56m

Simpson Bay Princess Juliana

Sat 3/7

5:16 pm-11:40 pm

1 stop8h 24m

$660

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Simpson Bay from

How to get the cheapest flight ticket from St. Louis to Simpson Bay

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 Simpson Bay?

In general, August is the cheapest month to fly from St. Louis to Simpson Bay. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $563. If you aren’t able to travel to Simpson Bay during the month of August, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $585.

What is the cheapest day to depart on your flight to Simpson Bay?

Our data shows that Wednesday is the least expensive day to fly to Simpson Bay. Tickets to fly out on this day can be as low as $592. Flights from St. Louis to Simpson Bay on a Saturday will generally be more expensive and average around $774. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Simpson Bay?

According to our data, the cheapest time of day to fly to Simpson Bay is in the evening. momondo users have found flights departing from St. Louis to Simpson Bay in the evening for as low as $638. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Simpson Bay is in the afternoon when prices are around $726.

How far in advance should I book a flight to Simpson Bay?

You are more likely to see cheaper flights to Simpson Bay from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Simpson Bay for around $715 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Simpson Bay from St. Louis for as low as $603 on momondo.

When to book flights from St. Louis to Simpson Bay

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Simpson Bay according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Simpson Bay (STL to SXM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Simpson Bay

Direct flights

None
There are no direct flights from St. Louis to Simpson Bay. There are no popular flight routes from St. Louis to Simpson Bay.
Search flight deals

  • How far is Lambert-St Louis to Simpson Bay Princess Juliana by plane?

    The distance between Lambert-St Louis and Simpson Bay Princess Juliana is about 2159.4 mi. 6h 48m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Simpson Bay Princess Juliana Airport?

    Prices for flights from Lambert-St Louis Airport to Simpson Bay Princess Juliana Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Simpson Bay Princess Juliana Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Simpson Bay Princess Juliana Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Simpson Bay Princess Juliana Airport.

  • What documentation or ID do you need to fly to Simpson Bay Princess Juliana Airport?

    The travel and health documents you'll need for your trip to Simpson Bay Princess Juliana Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Simpson Bay Princess Juliana Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Simpson Bay?

Best airlines flying from St. Louis to Simpson Bay

Compare and see reviews for airlines that fly from St. Louis to Simpson Bay with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $497Free CancellationRating
7.9
7,994 reviews
Search Delta flights
American AirlinesPriceFrom $560Free CancellationRating
7.2
11,032 reviews
Search American Airlines flights

Traveling to a place near Simpson Bay?

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

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Simpson Bay?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Simpson Bay for you.

Can I find flights from St. Louis to Simpson Bay with flexible booking policies on momondo?

Flights from St. Louis to Simpson Bay with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Simpson Bay?

momondo provides multiple filters to help you find the best flight to Simpson Bay 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 Simpson Bay right now. Can momondo alert me if prices change?

Yes. momondo can track prices for St. Louis to Simpson Bay flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Simpson Bay 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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 11/27
Thu 12/4
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to St. Maarten

Fly your favorite airline to Simpson Bay

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Delta
American Airlines
United Airlines
Turkish Airlines
Lufthansa
Frontier
British Airways
Qatar Airways
Spirit Airlines
Ryanair
Alaska Airlines
Emirates