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Cheap flights from St. Louis to Simpson Bay from $251

This is the cheapest one-way 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 5/18. 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

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Find the cheapest flights from St. Louis to Simpson Bay

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:21 pm - 3:06 pm
STL
-
SXM
16h 45m2 stops
Frontier Logo
3:09 pm - 9:11 am
SXM
-
STL
20h 02m2 stops
$392Frontier
Fri, Jan 9 - Sat, Jan 17
Multiple Airlines Logo
10:42 am - 2:15 pm
STL
-
SXM
25h 33m2 stops
Multiple Airlines Logo
3:20 pm - 10:56 am
SXM
-
STL
21h 36m1 stop
$400Multiple Airlines
Thu, Dec 25 - Wed, Dec 31
Multiple Airlines Logo
10:42 am - 2:15 pm
STL
-
SXM
25h 33m2 stops
Multiple Airlines Logo
3:20 pm - 10:56 am
SXM
-
STL
21h 36m1 stop
$428Multiple Airlines
Thu, Dec 25 - Mon, Dec 29
Multiple Airlines Logo
10:48 am - 2:15 pm
STL
-
SXM
25h 27m2 stops
Multiple Airlines Logo
3:20 pm - 10:56 am
SXM
-
STL
21h 36m1 stop
$440Multiple Airlines
Tue, Dec 23 - Wed, Dec 31
Delta Logo
6:00 am - 2:55 pm
STL
-
SXM
6h 55m1 stop
Delta Logo
1:55 pm - 8:37 pm
SXM
-
STL
8h 42m1 stop
$465Delta
Sun, Jan 18 - Fri, Jan 23
Multiple Airlines Logo
10:48 am - 2:15 pm
STL
-
SXM
25h 27m2 stops
Multiple Airlines Logo
3:20 pm - 10:56 am
SXM
-
STL
21h 36m1 stop
$468Multiple Airlines
Tue, Dec 23 - Mon, Dec 29
Delta Logo
6:00 am - 2:55 pm
STL
-
SXM
6h 55m1 stop
Delta Logo
4:20 pm - 4:37 pm
SXM
-
STL
26h 17m2 stops
$470Delta
Sun, Jan 18 - Fri, Jan 23
Spirit Airlines Logo
11:51 am - 2:15 pm
STL
-
SXM
24h 24m1 stop
Spirit Airlines Logo
3:20 pm - 10:56 am
SXM
-
STL
21h 36m1 stop
$473Spirit Airlines
Thu, Dec 25 - Wed, Dec 31
Multiple Airlines Logo
10:57 am - 2:15 pm
STL
-
SXM
25h 18m2 stops
Multiple Airlines Logo
3:20 pm - 10:56 am
SXM
-
STL
21h 36m1 stop
$475Multiple Airlines
Sun, Dec 28 - Wed, Dec 31
Air Canada Logo
4:05 pm - 4:00 pm
STL
-
SXM
21h 55m1 stop
Air Canada Logo
5:00 pm - 3:29 pm
SXM
-
STL
24h 29m1 stop
$483Air Canada
Mon, Jan 19 - Tue, Jan 27

Spirit Airlines flights from St. Louis to Simpson Bay

Our best Spirit Airlines deals on St. Louis to Simpson Bay flight tickets
Spirit Airlines
Dec 25
STL11:51 amLambert-St Louis
24h 24m
1 stop
SXM2:15 pmSimpson Bay Princess Juliana
Dec 31
SXM3:20 pmSimpson Bay Princess Juliana
21h 36m
1 stop
STL10:56 amLambert-St Louis
$473
Find similar
Spirit Airlines
Dec 23
STL11:51 amLambert-St Louis
24h 24m
1 stop
SXM2:15 pmSimpson Bay Princess Juliana
Dec 31
SXM3:20 pmSimpson Bay Princess Juliana
21h 36m
1 stop
STL10:56 amLambert-St Louis
$487
Find similar
Spirit Airlines
Dec 25
STL11:51 amLambert-St Louis
24h 24m
1 stop
SXM2:15 pmSimpson Bay Princess Juliana
Dec 29
SXM3:20 pmSimpson Bay Princess Juliana
21h 36m
1 stop
STL10:56 amLambert-St Louis
$501
Find similar

Air Canada flights from St. Louis to Simpson Bay

Our best Air Canada deals on St. Louis to Simpson Bay flight tickets
Air Canada
Jan 19
STL4:05 pmLambert-St Louis
21h 55m
1 stop
SXM4:00 pmSimpson Bay Princess Juliana
Jan 27
SXM5:00 pmSimpson Bay Princess Juliana
24h 29m
1 stop
STL3:29 pmLambert-St Louis
$483
Find similar
Air Canada
Mar 25
STL4:05 pmLambert-St Louis
20h 35m
2 stops
SXM1:40 pmSimpson Bay Princess Juliana
Apr 3
SXM4:00 pmSimpson Bay Princess Juliana
24h 24m
1 stop
STL3:24 pmLambert-St Louis
$486
Find similar
Air Canada
Jan 19
STL4:05 pmLambert-St Louis
21h 55m
1 stop
SXM4:00 pmSimpson Bay Princess Juliana
Jan 26
SXM5:00 pmSimpson Bay Princess Juliana
24h 29m
1 stop
STL3:29 pmLambert-St Louis
$488
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 December 11, 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

Fri 1/9

8:21 pm-3:06 pm

2 stops16h 45m

Simpson Bay Princess Juliana

Sat 1/17

3:09 pm-9:11 am

2 stops20h 02m

$392

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Thu 12/25

10:42 am-2:15 pm

2 stops25h 33m

Simpson Bay Princess Juliana

Wed 12/31

3:20 pm-10:56 am

1 stop21h 36m

$400

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Thu 12/25

10:42 am-2:15 pm

2 stops25h 33m

Simpson Bay Princess Juliana

Mon 12/29

3:20 pm-10:56 am

1 stop21h 36m

$428

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Tue 12/23

10:48 am-2:15 pm

2 stops25h 27m

Simpson Bay Princess Juliana

Wed 12/31

3:20 pm-10:56 am

1 stop21h 36m

$440

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 1/18

6:00 am-2:55 pm

1 stop6h 55m

Simpson Bay Princess Juliana

Fri 1/23

1:55 pm-8:37 pm

1 stop8h 42m

$465

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Tue 12/23

10:48 am-2:15 pm

2 stops25h 27m

Simpson Bay Princess Juliana

Mon 12/29

3:20 pm-10:56 am

1 stop21h 36m

$468

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 1/18

6:00 am-2:55 pm

1 stop6h 55m

Simpson Bay Princess Juliana

Fri 1/23

4:20 pm-4:37 pm

2 stops26h 17m

$470

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Thu 12/25

11:51 am-2:15 pm

1 stop24h 24m

Simpson Bay Princess Juliana

Wed 12/31

3:20 pm-10:56 am

1 stop21h 36m

$473

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Sun 12/28

10:57 am-2:15 pm

2 stops25h 18m

Simpson Bay Princess Juliana

Wed 12/31

3:20 pm-10:56 am

1 stop21h 36m

$475

St. LouisSimpson Bay

STL - SXM

STLSXM

Lambert-St Louis

Mon 1/19

4:05 pm-4:00 pm

1 stop21h 55m

Simpson Bay Princess Juliana

Tue 1/27

5:00 pm-3:29 pm

1 stop24h 29m

$483

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 $711 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 $573 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

Fastest flight time

6h 16m

Direct flights

None
The fastest flight from St. Louis to Simpson Bay takes 6h 16m
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 16m 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
8,007 reviews
Search Delta flights
American AirlinesPriceFrom $560Free CancellationRating
7.2
11,050 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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