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Cheap flights from Puerto Rico to St. Louis from $98

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Puerto Rico to St. Louis departing on 11/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Puerto Rico to St. Louis

Recent round-trip flight deals from Puerto Rico to St. Louis

Delta Logo
5:41 pm - 11:24 pmSJU-STL
6h 43m1 stop
Delta Logo
1:26 pm - 10:00 pmSTL-SJU
7h 34m1 stop
$205Delta
Find Deal
Fri, Sep 26 - Fri, Oct 3
Frontier Logo
3:39 am - 1:02 pmSJU-STL
10h 23m1 stop
Frontier Logo
1:52 pm - 11:59 pmSTL-SJU
9h 07m1 stop
$273Frontier
Find Deal
Thu, Sep 4 - Sun, Sep 7
American Airlines Logo
3:10 pm - 11:49 pmSJU-STL
9h 39m1 stop
American Airlines Logo
6:25 am - 10:10 pmSTL-SJU
14h 45m1 stop
$278American Airlines
Find Deal
Mon, Oct 27 - Thu, Oct 30
Frontier Logo
3:40 am - 5:10 pmSJU-STL
14h 30m1 stop
Frontier Logo
2:12 pm - 11:19 amSTL-SJU
20h 07m1 stop
$305Frontier
Find Deal
Sun, Oct 26 - Thu, Oct 30
Frontier Logo
3:40 am - 5:10 pmSJU-STL
14h 30m1 stop
Frontier Logo
9:06 pm - 12:00 pmSTL-SJU
13h 54m1 stop
$309Frontier
Find Deal
Thu, Oct 9 - Mon, Oct 13
Spirit Airlines Logo
3:19 pm - 10:02 amSJU-STL
19h 43m2 stops
Spirit Airlines Logo
10:57 am - 2:12 pmSTL-SJU
26h 15m2 stops
$326Spirit Airlines
Find Deal
Mon, Oct 27 - Thu, Oct 30
American Airlines Logo
6:10 am - 6:41 pmSJU-STL
13h 31m2 stops
American Airlines Logo
6:00 am - 6:15 pmSTL-SJU
11h 15m2 stops
$340American Airlines
Find Deal
Fri, Sep 26 - Fri, Oct 3
American Airlines Logo
6:25 am - 8:55 pmSJU-STL
16h 30m1 stop
American Airlines Logo
5:00 am - 1:04 pmSTL-SJU
6h 04m1 stop
$360American Airlines
Find Deal
Sun, Nov 23 - Tue, Dec 2
Spirit Airlines Logo
2:49 am - 10:02 amSJU-STL
8h 13m2 stops
Spirit Airlines Logo
10:57 am - 9:52 amSTL-SJU
20h 55m2 stops
$363Spirit Airlines
Find Deal
Wed, Oct 29 - Tue, Nov 4
Southwest Logo
11:10 am - 6:15 pmSJU-STL
8h 05m1 stop
Southwest Logo
12:30 pm - 10:40 pmSTL-SJU
9h 10m1 stop
$485Southwest
Find Deal
Fri, Sep 5 - Sat, Sep 6

American Airlines flights from Puerto Rico to St. Louis

Our best American Airlines deals on Puerto Rico to St. Louis flight tickets
American Airlines
Oct 27
SJU3:10 pmSan Juan Luis Munoz Marin Intl
9h 39m
1 stop
STL11:49 pmLambert-St Louis
Oct 30
STL6:25 amLambert-St Louis
14h 45m
1 stop
SJU10:10 pmSan Juan Luis Munoz Marin Intl
$278
Find similar
American Airlines
Sep 26
SJU6:10 amSan Juan Luis Munoz Marin Intl
13h 31m
2 stops
STL6:41 pmLambert-St Louis
Oct 3
STL6:00 amLambert-St Louis
11h 15m
2 stops
SJU6:15 pmSan Juan Luis Munoz Marin Intl
$340
Find similar
American Airlines
Nov 23
SJU6:25 amSan Juan Luis Munoz Marin Intl
16h 30m
1 stop
STL8:55 pmLambert-St Louis
Dec 2
STL5:00 amLambert-St Louis
6h 04m
1 stop
SJU1:04 pmSan Juan Luis Munoz Marin Intl
$360
Find similar

Spirit Airlines flights from Puerto Rico to St. Louis

Our best Spirit Airlines deals on Puerto Rico to St. Louis flight tickets
Spirit Airlines
Oct 27
SJU3:19 pmSan Juan Luis Munoz Marin Intl
19h 43m
2 stops
STL10:02 amLambert-St Louis
Oct 30
STL10:57 amLambert-St Louis
26h 15m
2 stops
SJU2:12 pmSan Juan Luis Munoz Marin Intl
$326
Find similar
Spirit Airlines
Oct 29
SJU2:49 amSan Juan Luis Munoz Marin Intl
8h 13m
2 stops
STL10:02 amLambert-St Louis
Nov 4
STL10:57 amLambert-St Louis
20h 55m
2 stops
SJU9:52 amSan Juan Luis Munoz Marin Intl
$363
Find similar
Spirit Airlines
Aug 24
SJU4:12 pmSan Juan Luis Munoz Marin Intl
22h 20m
1 stop
STL1:32 pmLambert-St Louis
Aug 28
STL2:30 pmLambert-St Louis
9h 26m
2 stops
SJU12:56 amSan Juan Luis Munoz Marin Intl
$378
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Puerto Rico to St. Louis 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 August 20, 2025.
Use the filters below to find and compare flights from Puerto Rico to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 9/26

5:41 pm-11:24 pm

1 stop6h 43m

Lambert-St Louis

Fri 10/3

1:26 pm-10:00 pm

1 stop7h 34m

$205

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 9/4

3:39 am-1:02 pm

1 stop10h 23m

Lambert-St Louis

Sun 9/7

1:52 pm-11:59 pm

1 stop9h 07m

$273

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Mon 10/27

3:10 pm-11:49 pm

1 stop9h 39m

Lambert-St Louis

Thu 10/30

6:25 am-10:10 pm

1 stop14h 45m

$278

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Sun 10/26

3:40 am-5:10 pm

1 stop14h 30m

Lambert-St Louis

Thu 10/30

2:12 pm-11:19 am

1 stop20h 07m

$305

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 10/9

3:40 am-5:10 pm

1 stop14h 30m

Lambert-St Louis

Mon 10/13

9:06 pm-12:00 pm

1 stop13h 54m

$309

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Mon 10/27

3:19 pm-10:02 am

2 stops19h 43m

Lambert-St Louis

Thu 10/30

10:57 am-2:12 pm

2 stops26h 15m

$326

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 9/26

6:10 am-6:41 pm

2 stops13h 31m

Lambert-St Louis

Fri 10/3

6:00 am-6:15 pm

2 stops11h 15m

$340

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Sun 11/23

6:25 am-8:55 pm

1 stop16h 30m

Lambert-St Louis

Tue 12/2

5:00 am-1:04 pm

1 stop6h 04m

$360

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Wed 10/29

2:49 am-10:02 am

2 stops8h 13m

Lambert-St Louis

Tue 11/4

10:57 am-9:52 am

2 stops20h 55m

$363

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 9/5

11:10 am-6:15 pm

1 stop8h 05m

Lambert-St Louis

Sat 9/6

12:30 pm-10:40 pm

1 stop9h 10m

$485

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 St. Louis from

How to get the cheapest flight ticket from Puerto Rico to St. Louis

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 St. Louis?

In general, January is the cheapest month to fly from Puerto Rico to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $286. The month of April is another great option to travel to St. Louis, with average flight prices from Puerto Rico averaging around $326.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $349. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $695. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Puerto Rico in the evening is the least expensive time of day to depart. momondo users have found prices as low as $282 when looking at flights departing in the evening. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $695 per ticket.

What is the cheapest Puerto Rico to Lambert-St Louis flight route?

Fly from San Juan Luis Munoz Marin Intl to Lambert-St Louis for the best Puerto Rico - Lambert-St Louis flight prices

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

You are more likely to see cheaper flights to St. Louis from Puerto Rico when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $397 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Puerto Rico for as low as $273 on momondo.

What cabin class options are available on Puerto Rico to Lambert-St Louis flights?

There are 1 cabin classes available to choose from on Puerto Rico to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Puerto Rico to St. Louis flight deals and tips

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

Fastest flight time

5h 10m

Direct flights

Sun

Airports in St. Louis

1 airport
The fastest flight from Puerto Rico to St. Louis takes 5h 10m
Direct flights go from Puerto Rico to St. Louis on Sunday. There are no airlines offering direct flights.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
Search flight deals

  • When did momondo last update prices for flights from Puerto Rico to Lambert-St Louis Airport?

    Prices for flights from Puerto Rico to Lambert-St Louis Airport refresh daily.

  • How many operators does momondo search for flights from Puerto Rico to Lambert-St Louis Airport?

  • How old do you have to be to fly from Puerto Rico to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Puerto Rico to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis 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 Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Puerto Rico to St. Louis?

Best airlines flying from Puerto Rico to St. Louis

Compare and see reviews for airlines that fly from Puerto Rico to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $163Free CancellationRating
5.8
3,207 reviews
Search Frontier flights
DeltaPriceFrom $244Free CancellationRating
7.9
7,982 reviews
Search Delta flights
American AirlinesPriceFrom $254Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $279Free CancellationRating
8.0
4,246 reviews
Search Southwest flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
Maryland Heights
Florissant
O'Fallon
Fenton
Collinsville
Wentzville
Alton
St. Peters
Festus
Farmington
Glencoe
Clayton
Edwardsville
Eureka
Litchfield
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Puerto Rico to St. Louis?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Puerto Rico to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. All flights to St. Louis from Puerto Rico on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Puerto Rico to St. Louis?

Once all potential Puerto Rico to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Puerto Rico to St. Louis right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Puerto Rico to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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