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San Juan

$64+ Cheap flights from St. Louis (STL) to San Juan

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
Nov 24 — Dec 11
Sun 11/24
Sun 12/1
1 adult, Economy
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The best prices from Lambert-St Louis to San Juan are usually found in April or September, booked 29 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from St. Louis to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to San Juan (PR1). 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 November 19, 2024.

Popular in

July

Cheapest in

April

Round-trip from

$254
(American Airlines)

One-way from

$64
(Frontier)
High demand for flights, 23% potential price rise
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Best time to find cheap flights, 23% potential price drop
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From Lambert-St Louis to San Juan
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One-way flight from Lambert-St Louis to San Juan
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Find flight deals from St. Louis to San Juan

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

This Booking.com deal was found by Cheapflights users on 11/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/85:02 pmSTL - SJU
1 stop7h 38mFrontier
Sun 12/159:49 pmSJU - STL
1 stop27h 44mFrontier
Deal found 11/19$274
This FareScan deal was found by Cheapflights users on 11/18. 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 FareScan is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/124:26 pmSTL - SJU
2 stops31h 14mSpirit Airlines
Mon 12/169:13 pmSJU - STL
1 stop20h 08mSpirit Airlines
Deal found 11/18$298
This eDestinos deal was found by Cheapflights users on 11/19. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/66:46 pmSTL - SJU
2 stops53h 54mMultiple Airlines
Sun 12/1510:44 pmSJU - STL
1 stop11h 31mMultiple Airlines
Deal found 11/19$302
This American Airlines deal was found by Cheapflights users on 11/18. 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.
Sat 12/77:17 amSTL - SJU
2 stops12h 36mAmerican Airlines
Thu 12/124:40 pmSJU - STL
2 stops9h 19mAmerican Airlines
Deal found 11/18$379
This United deal was found by Cheapflights users on 11/19. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/128:05 amSTL - SJU
1 stop10h 50mUnited Airlines
Sun 12/152:05 amSJU - STL
1 stop10h 54mUnited Airlines
Deal found 11/19$450
This Southwest deal was found by Cheapflights users on 11/18. 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.
Sat 12/141:15 pmSTL - SJU
2 stops9h 30mSouthwest
Tue 12/177:55 amSJU - STL
2 stops11h 20mSouthwest
Deal found 11/18$554

Find flights from St. Louis to San Juan within your budget

Customize your flight search to find flights from St. Louis to San Juan 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 2,659,078 searches. Data last updated November 19, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Wed 2/5

9:36 am-12:04 am

2 stops12h 28m

San Juan Luis Munoz Marin Intl

Wed 2/12

7:45 am-10:17 pm

1 stop16h 32m

$264

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Mon 2/10

5:05 pm-11:30 am

1 stop16h 25m

San Juan Luis Munoz Marin Intl

Sat 2/22

6:05 pm-7:07 am

2 stops15h 02m

$266

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sun 12/8

5:02 pm-2:40 am

1 stop7h 38m

San Juan Luis Munoz Marin Intl

Sun 12/15

9:49 pm-11:33 pm

1 stop27h 44m

$274

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Tue 1/7

4:27 pm-8:22 pm

1 stop25h 55m

San Juan Luis Munoz Marin Intl

Wed 1/15

8:43 pm-2:43 pm

1 stop20h 00m

$299

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sat 1/11

12:41 pm-6:12 am

2 stops15h 31m

San Juan Luis Munoz Marin Intl

Tue 1/14

2:05 am-10:47 am

1 stop10h 42m

$344

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Wed 1/1

6:04 am-3:37 pm

1 stop7h 33m

San Juan Luis Munoz Marin Intl

Thu 1/9

4:25 pm-11:14 pm

1 stop8h 49m

$529

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Sat 3/8

5:25 am-2:35 pm

1 stop7h 10m

San Juan Luis Munoz Marin Intl

Sun 3/16

6:05 am-3:00 pm

2 stops9h 55m

$624

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

Wed 1/29

7:18 am-9:59 pm

2 stops12h 41m

$132

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Mon 2/10

8:31 pm-7:48 pm

3 stops21h 17m

$148

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 14 results
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Best time to book a flight from St. Louis to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan 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 San Juan

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

How far ahead should I book a flight from St. Louis to San Juan?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to San Juan. Price data was last updated on November 15, 2024.

The price you pay for your flight from St. Louis to San Juan may vary depending on when you book. For the best chance of a lower fare, look to book 29 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from St. Louis to San Juan?

Currently, September is the cheapest month in which you can book a flight from St. Louis to San Juan (average of $254). Flying from St. Louis to San Juan in March is currently the most expensive (average of $335). 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 SJU?

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

When flying from St. Louis to San Juan, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 37% versus a flight at noon.

What is the cheapest day to fly from St. Louis to San Juan?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to San Juan. Price data was last updated on January 21, 2024.

Travelers seeking maximum savings on their St. Louis to San Juan flight should consider departing on Friday evenings when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in San Juan by month

Plan your trip to San Juan by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Juan 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 San Juan when rainfall is around 2.2 in.

Temperature in San Juan by month

Plan your trip to San Juan by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Juan, 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 San Juan

Get insights into the airlines that provide service to San Juan. 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 San Juan. Reviews last updated November 19, 2024.
See what other customers who have flown with United Airlines, Southwest and Frontier from St. Louis to San Juan have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Food

7.2

Crew

8.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,015 reviews
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Food

7.2

Crew

8.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,460 reviews
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Food

7.2

Crew

8.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,765 reviews
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Food

7.2

Crew

8.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,173 reviews
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Food

7.2

Crew

8.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Food

7.2

Crew

8.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Related info for your journey

Find useful and relevant information for your journey from St. Louis to San Juan. 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 San Juan?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to San Juan. On average, Lambert-St Louis has 0 outbound flights to San Juan per day from 6 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • What are the cheapest airlines flying from St. Louis to San Juan round-trip?

    Our cheapest airline available from St. Louis to San Juan is American Airlines. Our recent data shows that you can find tickets from as low as $254 on this airline. Additional options worth looking into are Spirit Airlines and Frontier, starting at $255 and $268 round-trip. American Airlines is 42% cheaper than the average price of flights available within the next 90 days to this destination.

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

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $64. Delta flights start at $127 while deals on American Airlines start at $133 one-way.

  • Where are the most common layover locations when flying from St. Louis to San Juan?

    St. Louis to San Juan flights have a layover in Charlotte most often. Atlanta sees the next most layovers on St. Louis to San Juan flights.

  • What are some popular things to do or see while on a layover in Charlotte?

    The majority of Charlotte visitors spend their time at Carowind, Mint Museum Uptown, and Ovens Auditorium. Carowind, Mint Museum Uptown, and Ovens Auditorium are located about 8.2 mi, 5.4 mi, and 8.5 mi, respectively from Charlotte Douglas. Travelers in need of a car in Charlotte can rent one for about $52 per day.

  • What are some popular points of interest to see during a layover in Atlanta?

    Atlanta travelers tend to visit Georgia Aquarium, Fox Theatre, and World of Coca-Cola more than any other notable places. Georgia Aquarium, Fox Theatre, and World of Coca-Cola are located about 8.6 mi, 9.3 mi, and 8.6 mi, respectively from Atlanta Hartsfield-Jackson. Travelers can book a car rental at Atlanta Hartsfield-Jackson for about $60 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for St. Louis to San Juan flights?

    Flights departing from St. Louis and landing in San Juan layover in Orlando least frequently.

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

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

  • How can I find direct flights from St. Louis to San Juan?

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

  • Can I find deals for business class flights from St. Louis to San Juan?

    Yes. Cheapflights offers flight deals from St. Louis to San Juan 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 San Juan?

    Currently, September is the cheapest month in which you can book a flight from St. Louis to San Juan (average of $254). Flying from St. Louis to San Juan in March is currently the most expensive (average of $335). 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 San Juan

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Luis Munoz Marin Intl flights
Kansas City to Luis Munoz Marin Intl flights
Springfield to Luis Munoz Marin Intl flights
Kansas City to Aguadilla flights
St. Louis to Culebra flights

Top 6 airlines flying from St. Louis to San Juan

Discover the top 6 airlines that operate flights from St. Louis to San Juan. 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 2,659,078 searches. Data last updated November 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$164Average$312FlexibilityNo cancel feeOn-time65%
FrontierCheapest$168Average$305FlexibilityNo cancel feeOn-time62%
DeltaCheapest$262Average$470FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$264Average$565FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$301Average$498FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$374Average$552FlexibilityNo cancel feeOn-time63%
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