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$64+ Cheap flights from St. Louis (STL) to Puerto Rico

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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SJU
Dec 24 — Dec 311
Tue 12/24
Tue 12/31
1 adult, Economy
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Cheap flight deals from St. Louis to Puerto Rico

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Puerto Rico (PR0). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 19, 2024.

Round-trip from

$254
(American Airlines)

One-way from

$64
(Frontier)
From Lambert-St Louis to Puerto Rico
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One-way flight from Lambert-St Louis to Puerto Rico
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Find flight deals from St. Louis to Puerto Rico

Cheapest flights from St. Louis to Puerto Rico
Explore the most affordable flight options available from St. Louis to Puerto Rico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 19, 2024.

This CheapOair deal was found by Cheapflights users on 12/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/313:53 pmSTL - SJU
1 stop8h 56mMultiple Airlines
Wed 1/88:21 pmSJU - STL
1 stop20h 22mMultiple Airlines
Deal found 12/17$357
This Frontier deal was found by Cheapflights users on 12/18. 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.
Thu 12/193:53 pmSTL - SJU
1 stop9h 11mFrontier
Wed 12/256:16 pmSJU - STL
1 stop7h 24mFrontier
Deal found 12/18$408
This Delta deal was found by Cheapflights users on 12/18. 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.
Mon 12/236:04 amSTL - SJU
1 stop8h 40mDelta
Fri 12/272:10 pmSJU - STL
1 stop11h 30mDelta
Deal found 12/18$614
This American Airlines deal was found by Cheapflights users on 12/18. 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.
Mon 12/235:15 amSTL - SJU
1 stop6h 20mAmerican Airlines
Wed 1/16:25 amSJU - STL
1 stop8h 38mAmerican Airlines
Deal found 12/18$669
This Southwest deal was found by Cheapflights users on 12/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/227:40 pmSTL - SJU
1 stop12h 45mSouthwest
Fri 12/275:35 amSJU - STL
2 stops10h 25mSouthwest
Deal found 12/18$734
This Mytrip deal was found by Cheapflights users on 12/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/264:27 pmSTL - SJU
2 stops23h 26mSpirit Airlines
Mon 12/302:45 amSJU - STL
2 stops14h 36mSpirit Airlines
Deal found 12/18$751
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Sun 12/2210:35 amSTL - SJU
1 stop8h 20mUnited Airlines
Tue 12/247:45 amSJU - STL
2 stops14h 12mUnited Airlines
Deal found 12/17$760

Find flights from St. Louis to Puerto Rico within your budget

Customize your flight search to find flights from St. Louis to Puerto Rico 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 December 19, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Wed 2/19

12:52 pm-11:46 pm

1 stop8h 54m

San Juan Luis Munoz Marin Intl

Thu 2/27

2:00 pm-11:37 pm

1 stop11h 37m

$254

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Fri 2/14

5:20 pm-2:54 am

1 stop7h 34m

San Juan Luis Munoz Marin Intl

Mon 2/17

3:49 am-11:43 pm

1 stop21h 54m

$260

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Tue 1/7

5:05 pm-10:24 am

1 stop15h 19m

San Juan Luis Munoz Marin Intl

Wed 1/15

6:14 am-2:43 pm

2 stops34h 29m

$263

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sat 3/1

5:36 pm-6:12 am

2 stops10h 36m

San Juan Luis Munoz Marin Intl

Wed 3/5

2:05 am-2:23 pm

2 stops14h 18m

$270

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sun 1/12

4:28 pm-9:21 am

1 stop14h 53m

San Juan Luis Munoz Marin Intl

Sat 1/18

4:53 pm-2:43 pm

2 stops23h 50m

$271

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sat 2/8

11:47 am-10:07 pm

2 stops8h 20m

San Juan Luis Munoz Marin Intl

Thu 2/13

2:25 pm-10:03 pm

2 stops9h 38m

$319

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sat 3/1

12:50 pm-7:05 pm

Nonstop4h 15m

San Juan Luis Munoz Marin Intl

Thu 3/6

9:55 pm-8:15 am

1 stop12h 20m

$455

St. LouisCulebra

STL - CPX

STLCPX

Lambert-St Louis

Sun 5/4

6:15 am-5:21 pm

2 stops10h 06m

Culebra

Wed 5/14

10:48 am-11:44 pm

2 stops13h 56m

$1,556

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Mon 1/20

5:05 pm-2:19 am

1 stop7h 14m

$64

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Tue 2/18

3:48 pm-10:45 am

1 stop16h 57m

$102

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

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

Have a flexible travel schedule? Discover the best time to fly to Puerto Rico from St. Louis 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.

Travel insights for flights from St. Louis to Puerto Rico

Get recent, data-driven insights about flights from St. Louis to Puerto Rico including ideal travel times, pricing trends, and more.

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

Currently, September is the cheapest month in which you can book a flight from St. Louis to Puerto Rico (average of $254). Flying from St. Louis to Puerto Rico in March is currently the most expensive (average of $334). 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 STL to PR?

Find hourly flight availability from St. Louis to Puerto Rico. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 19, 2024.

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

Rainfall in Puerto Rico by month

Plan your trip to Puerto Rico by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Puerto Rico ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit Puerto Rico when rainfall is around 2.2 in.

Temperature in Puerto Rico by month

Plan your trip to Puerto Rico by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Puerto Rico, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

Reviews of airlines servicing Puerto Rico

Get insights into the airlines that provide service to Puerto Rico. 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 Puerto Rico. Reviews last updated December 19, 2024.
Read through reviews of airlines operating flights from St. Louis to Puerto Rico, such as Frontier, United Airlines and Spirit Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,836 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Comfort

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,836 reviews
Southwest
8.1
Very good
4,836 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Comfort

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,551 reviews
Southwest
8.1
Very good
4,836 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Comfort

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,600 reviews
Southwest
8.1
Very good
4,836 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Comfort

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
9,048 reviews
Southwest
8.1
Very good
4,836 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Comfort

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,836 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Comfort

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Puerto Rico. 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 from for flights from St. Louis to Puerto Rico?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to 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 St. Louis to Puerto Rico one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $64. Users have also found prices from $102 and $127 on Spirit Airlines and American Airlines, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Puerto Rico 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 St. Louis to Puerto Rico?

    Currently, September is the cheapest month in which you can book a flight from St. Louis to Puerto Rico (average of $254). Flying from St. Louis to Puerto Rico in March is currently the most expensive (average of $334). 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

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Alternative routes for St. Louis to Puerto Rico

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from St. Louis to Puerto Rico

Discover the top 6 airlines that operate flights from St. Louis to Puerto Rico. 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 December 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$144Average$248FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$172Average$312FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$264Average$541FlexibilityNo cancel feeOn-time69%
DeltaCheapest$264Average$443FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$281Average$502FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$374Average$567FlexibilityNo cancel feeOn-time63%
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