Cheap Flights from Jacksonville (JAX) to St. Louis (CPS)

Popular airlines from Jacksonville International Airport (JAX) 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 $325
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $325

Frequently asked questions

How much does a flight from Jacksonville Intl. Airport (JAX) to St. Louis Downtown Airport (CPS) cost?
Lock in a cheap one-way flight or cheap return flight from Jacksonville Intl. Airport (JAX) to St. Louis Downtown Airport (CPS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Jacksonville Intl. Airport (JAX) to St. Louis Downtown Airport (CPS)?
The cheapest month to fly from JAX to CPS is , when there's less demand. Off-peak months are typically when better flight deals are available between these airports.
What is the cheapest airline that flies from Jacksonville Intl. Airport (JAX) to St. Louis Downtown Airport (CPS)?
To find the cheapest airline flying from JAX to CPS, use Expedia's filter tool. Customize your search based on what's important to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Jacksonville Intl. Airport (JAX) to St. Louis Downtown Airport (CPS)?
Direct flights from Jacksonville Intl. Airport (JAX) to St. Louis Downtown Airport (CPS) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from JAX to CPS?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Jacksonville Intl. Airport (JAX) to St. Louis Downtown Airport (CPS)?
Choose a flight from Jacksonville Intl. Airport (JAX) to St. Louis Downtown Airport (CPS) that takes off before 3 PM to reduce the risk of cancellations and delays. Departures after this hour are on average 22% more likely to be canceled.**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 Jacksonville Intl. Airport (JAX)?
Explore your flight options from Jacksonville Intl. Airport (JAX) to Lambert-St. Louis Intl. Airport (STL). This is the only East St. Louis airport you can fly into if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Jacksonville Intl. Airport (JAX) to St. Louis Downtown Airport (CPS) last-minute?
Last-minute bookings from JAX to CPS are usually more expensive. To secure the lowest rates, start searching for flights well ahead of time. That said, if you can play around with your travel dates, you may score a cheap ticket just before your departure.
Is it cheaper to book a JAX to CPS flight and hotel package?
Opting for a JAX to CPS flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our impressive range of hotels and then add car rentals, activities and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Jacksonville Intl. Airport (JAX) to St. Louis Downtown Airport (CPS)?
In most cases, you're able to reschedule or cancel your JAX to CPS flight. However, additional charges may apply, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you want more details, head to our Customer Service portal.

Travel information

Origin airport
Jacksonville Intl.
Destination airport
St. Louis Downtown
Distance
737 mi

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Jacksonville to St. Louis Flights

The cheapest times to fly from Jacksonville 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 Jacksonville to St. Louis are during the month of . You can find some of the cheapest flights from Jacksonville to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Jacksonville to St. Louis

Sunday is one of the best days to book for cheap flights from Jacksonville 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 Jacksonville 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 Jacksonville 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 Jacksonville 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 Jacksonville 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.

 

Jacksonville to St. Louis Flights

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*Available to One Key members.