Cheap Flights from New Orleans (MSY) to St. Louis (CPS)

Popular airlines from Louis Armstrong New Orleans Intl. Airport (MSY) 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 $191
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $191

Frequently asked questions

How much does a flight from Louis Armstrong New Orleans Intl. Airport (MSY) to St. Louis Downtown Airport (CPS) cost?
Secure a cheap one-way flight or cheap return flight from Louis Armstrong New Orleans Intl. Airport (MSY) to St. Louis Downtown Airport (CPS) 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 Louis Armstrong New Orleans Intl. Airport (MSY) to St. Louis Downtown Airport (CPS)?
Traveling in can help you save, as it's the cheapest month for flights between MSY and CPS. You'll usually find the lowest prices during the off-season.
What is the cheapest airline that flies from Louis Armstrong New Orleans Intl. Airport (MSY) to St. Louis Downtown Airport (CPS)?
To find the cheapest airline that'll fly you from MSY 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 Louis Armstrong New Orleans Intl. Airport (MSY) to St. Louis Downtown Airport (CPS)?
You'll have to hop on a flight with a layover when traveling from Louis Armstrong New Orleans Intl. Airport (MSY) to St. Louis Downtown Airport (CPS). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from MSY to CPS?
Usually you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* But this can vary depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Louis Armstrong New Orleans Intl. Airport (MSY) to St. Louis Downtown Airport (CPS)?
To avoid possible delays on the Louis Armstrong New Orleans Intl. Airport (MSY) to St. Louis Downtown Airport (CPS) route, aim to travel before 3 PM. Departures after this time are 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 Louis Armstrong New Orleans Intl. Airport (MSY)?
Lambert-St. Louis Intl. Airport (STL) is the only airport in East St. Louis with direct flights from Louis Armstrong New Orleans Intl. Airport (MSY). Explore your options and discover affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Louis Armstrong New Orleans Intl. Airport (MSY) to St. Louis Downtown Airport (CPS) last-minute?
Booking your plane ticket from MSY to CPS just before your getaway is typically more expensive. But if you're flexible with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book a MSY to CPS flight and hotel package?
You'll typically save money by securing a MSY to CPS flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. After selecting your preferred flights and accommodations, consider adding extras including tours, car rentals and activities.
Can I cancel or change the date of my flight from Louis Armstrong New Orleans Intl. Airport (MSY) to St. Louis Downtown Airport (CPS)?
If you booked your MSY to CPS flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more details.

Travel information

Origin airport
Louis Armstrong New Orleans Intl.
Destination airport
St. Louis Downtown
Distance
593 mi

Book with confidence

New Orleans to St. Louis Flights

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

 

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

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

 

New Orleans to St. Louis Flights

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*Available to One Key members.