Cheap Flights from St. Louis (CPS) to St. Louis (STL)

Popular airlines from St. Louis, MO (CPS-St. Louis Downtown) to St. Louis Lambert Intl. Airport (STL)

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Flights from St. Louis (CPS) to St. Louis (STL)
Origin airport
St. Louis Downtown
Destination airport
Lambert-St. Louis Intl.
Distance
16 mi

St. Louis to St. Louis Flights

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

 

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

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

 

Frequently asked questions

How much does a flight from St. Louis Downtown Airport (CPS) to Lambert-St. Louis Intl. Airport (STL) cost?
Get a cheap one-way flight or cheap return flight from St. Louis Downtown Airport (CPS) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from St. Louis Downtown Airport (CPS) to Lambert-St. Louis Intl. Airport (STL)?
is the least expensive month to fly from CPS to STL. Traveling during quieter months is often the key to landing a great deal.
What is the cheapest airline that flies from St. Louis Downtown Airport (CPS) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline flying from CPS to STL, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from St. Louis Downtown Airport (CPS) to Lambert-St. Louis Intl. Airport (STL)?
There aren't any daily direct flights departing from St. Louis Downtown Airport (CPS) to Lambert-St. Louis Intl. Airport (STL). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from CPS to STL?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can change depending on a range of factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from St. Louis Downtown Airport (CPS) to Lambert-St. Louis Intl. Airport (STL)?
Book a flight from St. Louis Downtown Airport (CPS) to Lambert-St. Louis Intl. Airport (STL) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Later departures 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.
Is it cheaper to buy a plane ticket from St. Louis Downtown Airport (CPS) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your plane ticket from CPS to STL shortly before your journey is typically more expensive. But if there's some wiggle room with your departure dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a CPS to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking a CPS to STL flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one place will take the hassle out of planning your trip. Just pick your flights and select from our extensive range of hotels, then tailor your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from St. Louis Downtown Airport (CPS) to Lambert-St. Louis Intl. Airport (STL)?
If you booked your CPS to STL flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more details.

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