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Cheap flights from St. Louis to Simpson Bay from $440

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 9/19. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Simpson Bay

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
5:00 pm - 1:22 pm
STL
-
SXM
19h 22m
2 stops
American Airlines Logo
2:22 pm - 8:46 am
SXM
-
STL
19h 24m
2 stops
$440American Airlines
Sat, Sep 19 - Wed, Sep 23
American Airlines Logo
5:10 pm - 1:22 pm
STL
-
SXM
19h 12m
1 stop
American Airlines Logo
2:22 pm - 9:49 pm
SXM
-
STL
8h 27m
1 stop
$445American Airlines
Sat, Sep 19 - Wed, Sep 23
American Airlines Logo
5:16 am - 3:42 pm
STL
-
SXM
9h 26m
1 stop
American Airlines Logo
2:51 pm - 11:57 pm
SXM
-
STL
10h 06m
1 stop
$595American Airlines
Sun, Jun 28 - Thu, Jul 2
American Airlines Logo
8:14 pm - 3:42 pm
STL
-
SXM
18h 28m
2 stops
American Airlines Logo
2:51 pm - 8:46 am
SXM
-
STL
18h 55m
2 stops
$600American Airlines
Sun, Jun 28 - Thu, Jul 2
American Airlines Logo
5:18 am - 1:19 pm
STL
-
SXM
7h 01m
1 stop
American Airlines Logo
2:51 pm - 8:33 am
SXM
-
STL
18h 42m
1 stop
$605American Airlines
Tue, Jul 21 - Tue, Jul 28
Southwest Logo
8:00 am - 3:30 pm
STL
-
SXM
6h 30m
1 stop
Southwest Logo
2:25 pm - 12:10 am
SXM
-
STL
10h 45m
1 stop
$615Southwest
Sun, Jul 5 - Thu, Jul 9
Southwest Logo
8:00 am - 3:30 pm
STL
-
SXM
6h 30m
1 stop
Southwest Logo
2:25 pm - 12:45 am
SXM
-
STL
11h 20m
2 stops
$620Southwest
Sun, Jul 5 - Thu, Jul 9
American Airlines Logo
5:13 pm - 1:22 pm
STL
-
SXM
19h 09m
2 stops
American Airlines Logo
2:22 pm - 11:46 pm
SXM
-
STL
10h 24m
1 stop
$625American Airlines
Thu, Sep 10 - Thu, Sep 17
American Airlines Logo
5:00 am - 3:39 pm
STL
-
SXM
9h 39m
1 stop
American Airlines Logo
4:39 pm - 10:52 am
SXM
-
STL
19h 13m
2 stops
$630American Airlines
Wed, Aug 5 - Mon, Aug 10
American Airlines Logo
6:19 pm - 1:19 pm
STL
-
SXM
18h 00m
1 stop
American Airlines Logo
2:46 pm - 11:32 pm
SXM
-
STL
9h 46m
1 stop
$635American Airlines
Sat, Jul 25 - Sat, Aug 1

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American Airlines flights from St. Louis to Simpson Bay

Our best American Airlines deals on St. Louis to Simpson Bay flight tickets
American Airlines
Sep 19
STL5:00 pmLambert-St Louis
19h 22m
2 stops
SXM1:22 pmSimpson Bay Princess Juliana
Sep 23
SXM2:22 pmSimpson Bay Princess Juliana
19h 24m
2 stops
STL8:46 amLambert-St Louis
$440
American Airlines
Sep 19
STL5:10 pmLambert-St Louis
19h 12m
1 stop
SXM1:22 pmSimpson Bay Princess Juliana
Sep 23
SXM2:22 pmSimpson Bay Princess Juliana
8h 27m
1 stop
STL9:49 pmLambert-St Louis
$445
American Airlines
Jun 28
STL5:16 amLambert-St Louis
9h 26m
1 stop
SXM3:42 pmSimpson Bay Princess Juliana
Jul 2
SXM2:51 pmSimpson Bay Princess Juliana
10h 06m
1 stop
STL11:57 pmLambert-St Louis
$595

Southwest flights from St. Louis to Simpson Bay

Our best Southwest deals on St. Louis to Simpson Bay flight tickets
Southwest
Jul 5
STL8:00 amLambert-St Louis
6h 30m
1 stop
SXM3:30 pmSimpson Bay Princess Juliana
Jul 9
SXM2:25 pmSimpson Bay Princess Juliana
10h 45m
1 stop
STL12:10 amLambert-St Louis
$615
Southwest
Jul 5
STL8:00 amLambert-St Louis
6h 30m
1 stop
SXM3:30 pmSimpson Bay Princess Juliana
Jul 9
SXM2:25 pmSimpson Bay Princess Juliana
11h 20m
2 stops
STL12:45 amLambert-St Louis
$620
Southwest
Jul 5
STL8:00 pmLambert-St Louis
16h 25m
2 stops
SXM1:25 pmSimpson Bay Princess Juliana
Jul 9
SXM2:25 pmSimpson Bay Princess Juliana
11h 20m
2 stops
STL12:45 amLambert-St Louis
$643

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 June 15, 2026.
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

Cheapest round-trip

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sat 9/19

5:00 pm-1:22 pm

2 stops19h 22m

Simpson Bay Princess Juliana

Wed 9/23

2:22 pm-8:46 am

2 stops19h 24m

$440

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sat 9/19

5:10 pm-1:22 pm

1 stop19h 12m

Simpson Bay Princess Juliana

Wed 9/23

2:22 pm-9:49 pm

1 stop8h 27m

$445

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 6/28

5:16 am-3:42 pm

1 stop9h 26m

Simpson Bay Princess Juliana

Thu 7/2

2:51 pm-11:57 pm

1 stop10h 06m

$595

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 6/28

8:14 pm-3:42 pm

2 stops18h 28m

Simpson Bay Princess Juliana

Thu 7/2

2:51 pm-8:46 am

2 stops18h 55m

$600

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Tue 7/21

5:18 am-1:19 pm

1 stop7h 01m

Simpson Bay Princess Juliana

Tue 7/28

2:51 pm-8:33 am

1 stop18h 42m

$605
Quickest round-trip

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 7/5

8:00 am-3:30 pm

1 stop6h 30m

Simpson Bay Princess Juliana

Thu 7/9

2:25 pm-12:10 am

1 stop10h 45m

$615

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 7/5

8:00 am-3:30 pm

1 stop6h 30m

Simpson Bay Princess Juliana

Thu 7/9

2:25 pm-12:45 am

2 stops11h 20m

$620

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Thu 9/10

5:13 pm-1:22 pm

2 stops19h 09m

Simpson Bay Princess Juliana

Thu 9/17

2:22 pm-11:46 pm

1 stop10h 24m

$625

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Wed 8/5

5:00 am-3:39 pm

1 stop9h 39m

Simpson Bay Princess Juliana

Mon 8/10

4:39 pm-10:52 am

2 stops19h 13m

$630

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sat 7/25

6:19 pm-1:19 pm

1 stop18h 00m

Simpson Bay Princess Juliana

Sat 8/1

2:46 pm-11:32 pm

1 stop9h 46m

$635

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 typical price of a round-trip flight between St. Louis and Simpson Bay?

What is the cheapest month to fly to Simpson Bay?

In general, September 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 $517. If you aren’t able to travel to Simpson Bay during the month of September, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $585.

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

Fastest flight time

6h 45m

Direct flights

None
The fastest flight from St. Louis to Simpson Bay takes 6h 45m
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

Frequently asked questions about flying from St. Louis to Simpson Bay

  • 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 45m 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 $473Free CancellationRating
7.9
8,396 reviews
Search Delta flights
American AirlinesPriceFrom $553Free CancellationRating
7.1
11,660 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.

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