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St. Louis

$90+ Cheap flights from Puerto Rico to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — STL
ene. 7 — ene. 141
mié. 1/7
mié. 1/14
1 adult, Economy
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Cheap flight deals from Puerto Rico to St. Louis

Cheapest flights from Puerto Rico to St. Louis
Explore the most affordable flight options available from Puerto Rico to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 8, 2025.

This Frontier deal was found by Cheapflights users on 12/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/2410:33 amSJU - STL
1 stop14h 00mFrontier
lun. 12/2910:40 amSTL - SJU
1 stop7h 47mFrontier
Deal found 12/6$275
This Frontier deal was found by Cheapflights users on 12/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/611:05 amSJU - STL
1 stop13h 28mFrontier
mar. 12/93:30 pmSTL - SJU
1 stop9h 20mFrontier
Deal found 12/6$302
This Frontier deal was found by Cheapflights users on 12/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/115:09 pmSJU - STL
1 stop7h 24mFrontier
lun. 12/153:30 pmSTL - SJU
1 stop9h 20mFrontier
Deal found 12/7$314
This Priceline deal was found by Cheapflights users on 12/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/93:55 amSJU - STL
1 stop20h 38mFrontier
vie. 12/129:54 amSTL - SJU
1 stop22h 01mFrontier
Deal found 12/6$316
This Frontier deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/205:09 pmSJU - STL
1 stop7h 24mFrontier
lun. 12/2910:40 amSTL - SJU
1 stop7h 47mFrontier
Deal found 12/8$326
This Kiwi.com deal was found by Cheapflights users on 12/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/247:30 amSJU - STL
1 stop28h 10mMultiple Airlines
lun. 12/2910:40 amSTL - SJU
2 stops23h 49mMultiple Airlines
Deal found 12/6$363
This American Airlines deal was found by Cheapflights users on 12/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/208:25 amSJU - STL
2 stops10h 21mAmerican Airlines
lun. 12/295:30 amSTL - SJU
1 stop16h 29mAmerican Airlines
Deal found 12/6$530

Find flight deals from Puerto Rico to St. Louis

Keep the following information in mind while searching for Puerto Rico to St. Louis flight deals. Data was last updated diciembre 8, 2025.

Round-trip from

$210
(Mytrip)

One-way from

$90
(Priceline)

Popular in

July

Cheapest in

January

Average price

$434
From Puerto Rico to Lambert-St Louis
Search Deals
One-way flight from Puerto Rico to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($57 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated diciembre 8, 2025.
Use the filters below to find and compare flights from Puerto Rico to St. Louis that are best for you.

Fly from

Puerto Rico

Fly to

St. Louis

Route

Depart

Return

Price

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

jue. 1/15

6:00 am-10:34 pm

1 stop18h 34m

Lambert-St Louis

lun. 1/19

12:47 pm-2:30 am

1 stop11h 43m

$210

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

vie. 2/13

6:00 am-1:20 pm

1 stop9h 20m

Lambert-St Louis

lun. 2/16

2:45 pm-1:05 am

1 stop8h 20m

$225

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

jue. 1/15

6:27 pm-11:39 pm

1 stop7h 12m

Lambert-St Louis

lun. 1/19

3:45 pm-11:45 pm

1 stop6h 00m

$225

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

jue. 3/26

5:00 am-12:28 pm

1 stop8h 28m

Lambert-St Louis

lun. 3/30

5:00 am-10:34 pm

1 stop16h 34m

$225

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

lun. 2/2

4:36 pm-11:33 pm

1 stop8h 57m

Lambert-St Louis

vie. 2/6

8:22 pm-10:39 am

1 stop12h 17m

$225

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

jue. 1/15

7:00 am-2:35 pm

2 stops9h 35m

Lambert-St Louis

lun. 1/19

12:30 pm-12:40 am

1 stop10h 10m

$269

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

jue. 4/16

6:15 am-12:54 pm

1 stop7h 39m

Lambert-St Louis

dom. 4/19

9:00 am-8:06 pm

1 stop10h 06m

$298

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

mié. 1/28

4:36 pm-11:33 pm

1 stop8h 57m

$90

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

lun. 1/12

9:23 pm-10:34 pm

1 stop27h 11m

$96

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

mar. 3/31

2:30 pm-11:42 pm

1 stop10h 12m

$113

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/6

Showing 1-10 of 16 results
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Best time to book a flight from Puerto Rico to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Puerto Rico with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Puerto Rico to St. Louis

What is the cheapest month to book a flight from Puerto Rico to St. Louis?

Currently, June is the cheapest month in which you can book a flight from Puerto Rico to St. Louis (average of $125). Flying from Puerto Rico to St. Louis in August is currently the most expensive (average of $253). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PR to STL?

Find hourly flight availability from Puerto Rico to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 8, 2025.

It’s optimal to fly from Puerto Rico to St. Louis at noon. By choosing this option you can save up to 52% on the cost of your flight, compared to a flight in the afternoon.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated diciembre 8, 2025.
See what other customers who have flown with Southwest, Delta, and American Airlines from Puerto Rico to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,252 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,252 reviews
Southwest
8.0
Very good
4,252 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,010 reviews
Southwest
8.0
Very good
4,252 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,044 reviews
Southwest
8.0
Very good
4,252 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.8
Fair
3,087 reviews
Southwest
8.0
Very good
4,252 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Puerto Rico to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from Puerto Rico?

    Most people fly into Lambert-St Louis (STL) if they book a flight to St. Louis from Puerto Rico. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How long is the flight from Puerto Rico to St. Louis?

    Departing from Puerto Rico to St. Louis will take you 7h 12m. There are 2024 mi between Puerto Rico and St. Louis. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Puerto Rico to St. Louis one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $83. Users have also found prices from $104 and $108 on Delta and Southwest, respectively.

  • Can I find deals for flights from Puerto Rico to St. Louis that include hotel bookings?

    Yes. In addition to deals on Puerto Rico to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Puerto Rico to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Puerto Rico to St. Louis.

  • Can I find deals for business class flights from Puerto Rico to St. Louis?

    Yes. Cheapflights offers flight deals from Puerto Rico to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Puerto Rico to St. Louis?

    Currently, June is the cheapest month in which you can book a flight from Puerto Rico to St. Louis (average of $125). Flying from Puerto Rico to St. Louis in August is currently the most expensive (average of $253). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Swansea
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Puerto Rico to St. Louis

Discover the top 4 airlines that operate flights from Puerto Rico to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated diciembre 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$128Average$261FlexibilityNo cancel feeOn-time62%
DeltaCheapest$205Average$375FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$254Average$417FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$342Average$610FlexibilityNo cancel feeOn-time63%

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