Cheap Flights from San Juan (SJU) to St. Louis (CPS)

Popular airlines from Luis Munoz Marin Intl. Airport (SJU) to St. Louis, MO (CPS-St. Louis Downtown)

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $393
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $393

Frequently asked questions

How much does a flight from Luis Munoz Marin Intl. Airport (SJU) to St. Louis Downtown Airport (CPS) cost?
Lock in a cheap one-way flight or cheap return flight from Luis Munoz Marin Intl. Airport (SJU) to St. Louis Downtown Airport (CPS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Luis Munoz Marin Intl. Airport (SJU) to St. Louis Downtown Airport (CPS)?
Planning your trip for may help you find better deals, as it's the cheapest month for flights between SJU and CPS. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Luis Munoz Marin Intl. Airport (SJU) to St. Louis Downtown Airport (CPS)?
To find the cheapest airline flying from SJU to CPS, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Luis Munoz Marin Intl. Airport (SJU) to St. Louis Downtown Airport (CPS)?
There aren't any daily direct flights from Luis Munoz Marin Intl. Airport (SJU) to St. Louis Downtown Airport (CPS). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be on your way in no time.
What day of the week has the most flights from SJU to CPS?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can change depending on various factors, including the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Luis Munoz Marin Intl. Airport (SJU) to St. Louis Downtown Airport (CPS)?
To avoid possible delays on the Luis Munoz Marin Intl. Airport (SJU) to St. Louis Downtown Airport (CPS) route, aim to travel before 3 PM. Departures after this hour have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for East St. Louis from Luis Munoz Marin Intl. Airport (SJU)?
Lambert-St. Louis Intl. Airport (STL) is the only airport in East St. Louis with direct flights from Luis Munoz Marin Intl. Airport (SJU). Browse your options and discover cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Luis Munoz Marin Intl. Airport (SJU) to St. Louis Downtown Airport (CPS) last-minute?
Last-minute bookings from SJU to CPS are generally more expensive. To secure the lowest rates, start searching for flights as soon as possible. That said, if you're flexible with your travel dates, it's possible to find a cheap ticket just before your departure.
Is it cheaper to book a SJU to CPS flight and hotel package?
Compared with arranging flights and hotels separately, booking a SJU to CPS flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one place takes the hassle out of travel planning. Just secure your flights and choose from our wide range of hotels, then customize your trip with other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Luis Munoz Marin Intl. Airport (SJU) to St. Louis Downtown Airport (CPS)?
In most cases, you can cancel or modify your SJU to CPS flight. However, additional charges may apply, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's policies and fees on flight changes, or if you need further details, visit our Customer Service portal.

Travel information

Origin airport
Luis Munoz Marin Intl.
Destination airport
St. Louis Downtown
Distance
2009 mi

Book with confidence

San Juan to St. Louis Flights

The cheapest times to fly from San Juan to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Juan to St. Louis are during the month of . You can find some of the cheapest flights from San Juan to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Juan to St. Louis

Sunday is one of the best days to book for cheap flights from San Juan to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Juan to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Juan to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Juan to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Juan to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

San Juan to St. Louis Flights

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*Available to One Key members.