Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Puerto Rico to St. Louis from $99

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 4/29. 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 Puerto Rico to St. Louis

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

Enter your travel dates to find the best prices.
Delta Logo
5:34 pm - 11:36 pm
SJU
-
STL
7h 02m
1 stop
Delta Logo
9:59 am - 8:24 pm
STL
-
SJU
9h 25m
1 stop
$216Delta
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
3:21 am - 11:19 pm
SJU
-
STL
20h 58m
1 stop
Frontier Logo
4:59 pm - 2:01 am
STL
-
SJU
8h 02m
1 stop
$223Frontier
Thu, Apr 30 - Sun, May 3
Delta Logo
5:34 pm - 11:36 pm
SJU
-
STL
7h 02m
1 stop
Delta Logo
7:25 am - 4:23 pm
STL
-
SJU
7h 58m
1 stop
$256Delta
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
10:28 am - 11:25 pm
SJU
-
STL
13h 57m
1 stop
Frontier Logo
4:59 pm - 7:56 am
STL
-
SJU
13h 57m
1 stop
$259Frontier
Tue, Apr 7 - Sat, Apr 11
American Airlines Logo
7:00 pm - 10:16 am
SJU
-
STL
16h 16m
1 stop
American Airlines Logo
6:11 pm - 4:32 am
STL
-
SJU
9h 21m
1 stop
$269American Airlines
Mon, Apr 20 - Sat, Apr 25
Frontier Logo
6:30 am - 11:19 pm
SJU
-
STL
17h 49m
1 stop
Frontier Logo
4:59 pm - 2:01 am
STL
-
SJU
8h 02m
1 stop
$290Frontier
Mon, Apr 20 - Sat, Apr 25
American Airlines Logo
1:31 pm - 11:46 pm
SJU
-
STL
11h 15m
2 stops
American Airlines Logo
6:29 am - 10:05 pm
STL
-
SJU
14h 36m
1 stop
$296American Airlines
Thu, Apr 16 - Sun, Apr 19
American Airlines Logo
7:05 pm - 10:58 am
SJU
-
STL
16h 53m
1 stop
American Airlines Logo
6:06 am - 3:59 pm
STL
-
SJU
8h 53m
2 stops
$302American Airlines
Thu, Aug 13 - Tue, Aug 25
Frontier Logo
3:08 am - 7:02 am
SJU
-
STL
28h 54m
1 stop
Frontier Logo
4:51 pm - 1:58 am
STL
-
SJU
8h 07m
1 stop
$327Frontier
Wed, Mar 25 - Mon, Mar 30
Frontier Logo
3:08 am - 6:50 am
SJU
-
STL
28h 42m
2 stops
Frontier Logo
2:17 pm - 12:49 am
STL
-
SJU
33h 32m
2 stops
$328Frontier
Mon, May 18 - Tue, Jun 2

Delta flights from Puerto Rico to St. Louis

Our best Delta deals on Puerto Rico to St. Louis flight tickets
Delta
Apr 16
SJU5:34 pmSan Juan Luis Munoz Marin Intl
7h 02m
1 stop
STL11:36 pmLambert-St Louis
Apr 19
STL9:59 amLambert-St Louis
9h 25m
1 stop
SJU8:24 pmSan Juan Luis Munoz Marin Intl
$216
Delta
Apr 16
SJU5:34 pmSan Juan Luis Munoz Marin Intl
7h 02m
1 stop
STL11:36 pmLambert-St Louis
Apr 19
STL7:25 amLambert-St Louis
7h 58m
1 stop
SJU4:23 pmSan Juan Luis Munoz Marin Intl
$256

Frontier flights from Puerto Rico to St. Louis

Our best Frontier deals on Puerto Rico to St. Louis flight tickets
Frontier
Apr 30
SJU3:21 amSan Juan Luis Munoz Marin Intl
20h 58m
1 stop
STL11:19 pmLambert-St Louis
May 3
STL4:59 pmLambert-St Louis
8h 02m
1 stop
SJU2:01 amSan Juan Luis Munoz Marin Intl
$223
Frontier
Apr 7
SJU10:28 amSan Juan Luis Munoz Marin Intl
13h 57m
1 stop
STL11:25 pmLambert-St Louis
Apr 11
STL4:59 pmLambert-St Louis
13h 57m
1 stop
SJU7:56 amSan Juan Luis Munoz Marin Intl
$259
Frontier
Apr 20
SJU6:30 amSan Juan Luis Munoz Marin Intl
17h 49m
1 stop
STL11:19 pmLambert-St Louis
Apr 25
STL4:59 pmLambert-St Louis
8h 02m
1 stop
SJU2:01 amSan Juan Luis Munoz Marin Intl
$290

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 March 2, 2026.
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

Thu 4/16

5:34 pm-11:36 pm

1 stop7h 02m

Lambert-St Louis

Sun 4/19

9:59 am-8:24 pm

1 stop9h 25m

$216

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 4/30

3:21 am-11:19 pm

1 stop20h 58m

Lambert-St Louis

Sun 5/3

4:59 pm-2:01 am

1 stop8h 02m

$223

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 4/16

5:34 pm-11:36 pm

1 stop7h 02m

Lambert-St Louis

Sun 4/19

7:25 am-4:23 pm

1 stop7h 58m

$256

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Tue 4/7

10:28 am-11:25 pm

1 stop13h 57m

Lambert-St Louis

Sat 4/11

4:59 pm-7:56 am

1 stop13h 57m

$259

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Mon 4/20

7:00 pm-10:16 am

1 stop16h 16m

Lambert-St Louis

Sat 4/25

6:11 pm-4:32 am

1 stop9h 21m

$269

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Mon 4/20

6:30 am-11:19 pm

1 stop17h 49m

Lambert-St Louis

Sat 4/25

4:59 pm-2:01 am

1 stop8h 02m

$290

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 4/16

1:31 pm-11:46 pm

2 stops11h 15m

Lambert-St Louis

Sun 4/19

6:29 am-10:05 pm

1 stop14h 36m

$296

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 8/13

7:05 pm-10:58 am

1 stop16h 53m

Lambert-St Louis

Tue 8/25

6:06 am-3:59 pm

2 stops8h 53m

$302

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Wed 3/25

3:08 am-7:02 am

1 stop28h 54m

Lambert-St Louis

Mon 3/30

4:51 pm-1:58 am

1 stop8h 07m

$327

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Mon 5/18

3:08 am-6:50 am

2 stops28h 42m

Lambert-St Louis

Tue 6/2

2:17 pm-12:49 am

2 stops33h 32m

$328

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $248. The month of September is another great option to travel to St. Louis, with average flight prices from Puerto Rico averaging around $298.

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 $399 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 $269 on momondo.

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

There is only 1 cabin class 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.

Can stopping save me money on Puerto Rico to St. Louis flights?

No. A direct flight is the cheapest option for a flight between Puerto Rico to St. Louis.

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

6h 56m

Direct flights

Sun

Airports in St. Louis

1 airport
The fastest flight from Puerto Rico to St. Louis takes 6h 56m
Direct flights go from Puerto Rico to St. Louis on Sunday. There are no airlines offering direct flights.
There is 1 airport in St. Louis. From Puerto Rico there are direct flights to 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 $84Free CancellationRating
5.7
3,040 reviews
Search Frontier flights
DeltaPriceFrom $170Free CancellationRating
7.9
8,237 reviews
Search Delta flights
American AirlinesPriceFrom $225Free CancellationRating
7.1
11,369 reviews
Search American Airlines flights
SouthwestPriceFrom $342Free CancellationRating
8.0
4,306 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
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
St. Peters
Wentzville
Collinsville
Alton
Fenton
Farmington
Edwardsville
Festus
Clayton
Eureka
Litchfield
Glencoe
Grafton

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.

An easier way to manage your St. Louis 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
Wed 4/1
Wed 4/8
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States