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$60+ Cheap flights from San Juan 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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — STL
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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The best prices from San Juan to Lambert-St Louis are usually found in April or January, booked 65 days in advance, depart on a Saturday or Tuesday and return on a Wednesday

Cheap flight deals from San Juan to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from San Juan (PR1) to St. Louis (STL). 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 January 21, 2025.

Round-trip from

$118
(eDestinos)

One-way from

$60
(eDestinos)

Popular in

June

Cheapest in

April

Average price

$331
From San Juan to Lambert-St Louis
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One-way flight from San Juan to Lambert-St Louis
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Highest demand for flights based on searches. 9% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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Find flight deals from San Juan to St. Louis

Cheapest flights from San Juan to St. Louis
Explore the most affordable flight options available from San Juan to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This eDestinos deal was found by Cheapflights users on 1/20. 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.
Thu 2/64:51 pmSJU - STL
1 stop8h 40mFrontier
Tue 2/255:20 pmSTL - SJU
1 stop14h 29mFrontier
Deal found 1/20$118
This OneTravel deal was found by Cheapflights users on 1/20. 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 OneTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/133:49 amSJU - STL
1 stop21h 54mMultiple Airlines
Tue 2/184:00 pmSTL - SJU
1 stop29h 22mMultiple Airlines
Deal found 1/20$211
This American Airlines deal was found by Cheapflights users on 1/20. 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.
Wed 2/126:15 amSJU - STL
2 stops12h 05mAmerican Airlines
Wed 2/196:00 amSTL - SJU
1 stop15h 54mAmerican Airlines
Deal found 1/20$265
This United Airlines deal was found by Cheapflights users on 1/21. 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 2/122:05 amSJU - STL
2 stops14h 31mUnited Airlines
Tue 2/1810:55 amSTL - SJU
1 stop8h 51mUnited Airlines
Deal found 1/21$355
This Delta deal was found by Cheapflights users on 1/20. 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.
Wed 6/42:04 pmSJU - STL
1 stop7h 29mDelta
Wed 6/117:20 amSTL - SJU
1 stop11h 21mDelta
Deal found 1/20$405
This Southwest deal was found by Cheapflights users on 1/20. 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 2/112:40 pmSJU - STL
Nonstop5h 05mSouthwest
Tue 2/111:00 pmSTL - SJU
1 stop9h 40mSouthwest
Deal found 1/20$441

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

Customize your flight search to find flights from San Juan 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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 2/6

4:51 pm-11:31 pm

1 stop8h 40m

Lambert-St Louis

Tue 2/25

5:20 pm-9:49 am

1 stop14h 29m

$118

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 2/13

3:49 am-11:43 pm

1 stop21h 54m

Lambert-St Louis

Tue 2/18

4:00 pm-11:22 pm

1 stop29h 22m

$211

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Wed 2/12

6:15 am-4:20 pm

2 stops12h 05m

Lambert-St Louis

Wed 2/19

6:00 am-11:54 pm

1 stop15h 54m

$265

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Wed 2/12

2:05 am-2:36 pm

2 stops14h 31m

Lambert-St Louis

Tue 2/18

10:55 am-9:46 pm

1 stop8h 51m

$355

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Wed 6/4

2:04 pm-8:33 pm

1 stop7h 29m

Lambert-St Louis

Wed 6/11

7:20 am-7:41 pm

1 stop11h 21m

$405

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Sat 2/1

12:40 pm-3:45 pm

Nonstop5h 05m

Lambert-St Louis

Tue 2/11

1:00 pm-12:40 am

1 stop9h 40m

$441

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 2/6

2:51 pm-11:31 pm

1 stop10h 40m

$60

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Wed 2/19

4:15 pm-11:36 pm

1 stop9h 21m

$133

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Mon 5/12

1:10 am-6:27 pm

2 stops18h 17m

$162

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Sat 2/1

6:14 am-12:10 pm

3 stops31h 56m

$207

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 13 results
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Best time to book a flight from San Juan to St. Louis

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

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

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

Use this chart to determine the optimal time to book a round-trip flight from San Juan to St. Louis. Price data was last updated on January 17, 2025.

Booking 65 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Juan to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, August is the cheapest month in which you can book a flight from San Juan to St. Louis (average of $311). Flying from San Juan 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 SJU to STL?

Find hourly flight availability from San Juan 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 January 21, 2025.

One of the essential ways to save on airfare from San Juan to St. Louis is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 47% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from San Juan to St. Louis. Price data was last updated on December 16, 2024.

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

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 January 21, 2025.
Read through reviews of airlines operating flights from San Juan to St. Louis, such as United Airlines, American Airlines and Frontier. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

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
4,662 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

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
9,706 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

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
8,521 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

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
8,985 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

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
4,662 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

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 San Juan 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 San Juan?

    Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to St. Louis from San Juan. Booking flights from San Juan to Lambert-St Louis (STL) should be relatively easy as there are 0 daily inbound flights from San Juan from 5 different airlines.

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

    Our cheapest airline available from San Juan to St. Louis is Frontier. Our recent data shows that you can find tickets from as low as $118 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $265 and $355 round-trip. These flights start at 70% lower than the current average price 3 months from now.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $60. Users have also found prices from $133 and $208 on Delta and United Airlines, respectively.

  • What are the cheapest flights from San Juan to St. Louis?

    While on average a flight from San Juan to St. Louis is generally $688, our data shows the cheapest flight currently is $288. When looking at the most popular route, (San Juan Luis Munoz Marin Intl - Lambert-St Louis), you can expect to pay $134 for that flight.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from San Juan to St. Louis (average of $311). Flying from San Juan 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 San Juan?

Book flights to San Juan if you plan to visit one of these locations
Fenton
Fairview Heights
Maryland Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Alton
Farmington
Chesterfield

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Alternative routes for San Juan to St. Louis

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

Top 5 airlines flying from San Juan to St. Louis

Discover the top 5 airlines that operate flights from San Juan 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$163Average$260FlexibilityNo cancel feeOn-time62%
DeltaCheapest$244Average$363FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$255Average$552FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$274Average$423FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$279Average$554FlexibilityNo cancel feeOn-time63%
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