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$98+ 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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — STL
Aug 18 — Aug 251
Mon 8/18
Mon 8/25
1 adult, Economy
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Cheap 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 August 13, 2025.

Round-trip from

$205
(Delta)

One-way from

$98
(Southwest)

Popular in

June

Cheapest in

January

Average price

$342
From Puerto Rico to Lambert-St Louis
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One-way flight from Puerto Rico to Lambert-St Louis
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Highest demand for flights based on searches. 18% potential increase in price ($88 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 August 13, 2025.

This Delta deal was found by Cheapflights users on 8/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/265:41 pmSJU - STL
1 stop6h 43mDelta
Fri 10/31:26 pmSTL - SJU
1 stop7h 34mDelta
Deal found 8/11$205
This United Airlines deal was found by Cheapflights users on 8/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/122:05 amSJU - STL
1 stop10h 47mUnited Airlines
Sat 11/1510:00 amSTL - SJU
2 stops10h 22mUnited Airlines
Deal found 8/11$247
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Thu 11/206:25 amSJU - STL
1 stop16h 30mAmerican Airlines
Sun 11/236:45 pmSTL - SJU
1 stop16h 19mAmerican Airlines
Deal found 8/13$255
This Priceline deal was found by Cheapflights users on 8/11. 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.
Wed 11/123:59 amSJU - STL
1 stop11h 28mFrontier
Sat 11/152:22 pmSTL - SJU
1 stop7h 32mFrontier
Deal found 8/11$267
This Priceline deal was found by Cheapflights users on 8/13. 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.
Thu 9/44:42 pmSJU - STL
1 stop21h 20mFrontier
Sun 9/71:52 pmSTL - SJU
1 stop9h 07mFrontier
Deal found 8/13$277
This Delta deal was found by Cheapflights users on 8/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/512:50 pmSJU - STL
1 stop10h 12mDelta
Sun 9/76:00 amSTL - SJU
1 stop6h 30mDelta
Deal found 8/12$278
This Priceline deal was found by Cheapflights users on 8/12. 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.
Thu 9/43:39 amSJU - STL
1 stop10h 23mFrontier
Sun 9/71:52 pmSTL - SJU
1 stop11h 42mFrontier
Deal found 8/12$285
This FlightHub deal was found by Cheapflights users on 8/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/202:11 amSJU - STL
2 stops12h 21mSpirit Airlines
Sun 8/2410:37 amSTL - SJU
1 stop10h 11mSpirit Airlines
Deal found 8/12$300
This Kiwi.com deal was found by Cheapflights users on 8/11. 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.
Wed 8/274:05 pmSJU - STL
2 stops22h 27mSpirit Airlines
Sun 8/3110:37 amSTL - SJU
1 stop10h 11mSpirit Airlines
Deal found 8/11$301
This FlightHub deal was found by Cheapflights users on 8/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/163:08 pmSJU - STL
1 stop23h 26mFrontier
Mon 8/185:40 pmSTL - SJU
1 stop24h 28mFrontier
Deal found 8/12$316
This Priceline deal was found by Cheapflights users on 8/11. 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.
Wed 8/278:13 pmSJU - STL
1 stop17h 54mMultiple Airlines
Sun 8/3110:37 amSTL - SJU
1 stop10h 11mMultiple Airlines
Deal found 8/11$334

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 August 13, 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

Mon 9/29

5:41 pm-11:24 pm

1 stop6h 43m

Lambert-St Louis

Sat 10/4

6:01 am-4:31 pm

1 stop9h 30m

$205

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Fri 9/26

7:05 pm-9:16 am

2 stops15h 11m

Lambert-St Louis

Fri 10/3

5:18 am-2:15 pm

1 stop7h 57m

$205

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 11/13

8:10 am-3:46 pm

1 stop9h 36m

Lambert-St Louis

Sat 11/15

10:00 am-10:22 pm

2 stops10h 22m

$205

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 10/16

7:10 am-11:58 pm

1 stop17h 48m

Lambert-St Louis

Tue 10/21

6:00 am-3:55 pm

2 stops8h 55m

$205

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 11/13

6:20 pm-11:39 pm

1 stop7h 19m

Lambert-St Louis

Sun 11/16

7:20 am-5:15 pm

1 stop7h 55m

$205

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 11/13

6:25 am-5:37 pm

1 stop13h 12m

Lambert-St Louis

Sat 11/15

10:45 am-11:47 pm

1 stop11h 02m

$205

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 11/20

6:25 am-8:55 pm

1 stop16h 30m

Lambert-St Louis

Sun 11/23

6:45 pm-1:04 pm

1 stop16h 19m

$255

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Sat 11/15

8:50 am-12:00 pm

Nonstop5h 10m

$98

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Tue 10/14

1:05 am-10:49 am

2 stops10h 44m

$103

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 16 results
1
2

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, August is the cheapest month in which you can book a flight from Puerto Rico to St. Louis (average of $311). Flying from Puerto Rico to St. Louis in March is currently the most expensive (average of $356). 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 August 13, 2025.

When flying from Puerto Rico to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 August 13, 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
4,246 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,979 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,221 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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.

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

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as $98. Users have also found prices from $103 and $109 on United Airlines and American Airlines, 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, August is the cheapest month in which you can book a flight from Puerto Rico to St. Louis (average of $311). Flying from Puerto Rico to St. Louis in March is currently the most expensive (average of $356). 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
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Farmington
Festus

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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 August 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$163Average$240FlexibilityNo cancel feeOn-time62%
DeltaCheapest$244Average$371FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$254Average$415FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$279Average$580FlexibilityNo cancel feeOn-time63%

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