$80 Cheap Flights from New Orleans (MSY) to St. Louis (STL)

View $80 flight on Mon, Sep 15, 2025Opens in a new window

Popular airlines from Louis Armstrong New Orleans Intl. Airport (MSY) to St. Louis Lambert Intl. Airport (STL)

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

Prices were available within the past 7 days and start at $80 for one-way flights and $177 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Tue, Oct 28 - Sat, Nov 1
MSY
New Orleans
STL
St. Louis
$177 Roundtrip, found 9 hours ago
$177
Roundtrip
found 9 hours ago
Select Southwest Airlines flight, departing Tue, Oct 28 from New Orleans to St. Louis, returning Sat, Nov 1, priced at $177 found 9 hours ago
American Airlines
Thu, Sep 25 - Mon, Sep 29
MSY
New Orleans
STL
St. Louis
$178 Roundtrip, found 1 day ago
$178
Roundtrip
found 1 day ago
Select American Airlines flight, departing Thu, Sep 25 from New Orleans to St. Louis, returning Mon, Sep 29, priced at $178 found 1 day ago
Southwest Airlines
Thu, Sep 18 - Mon, Sep 22
MSY
New Orleans
STL
St. Louis
$178 Roundtrip, found 10 hours ago
$178
Roundtrip
found 10 hours ago
Select Southwest Airlines flight, departing Thu, Sep 18 from New Orleans to St. Louis, returning Mon, Sep 22, priced at $178 found 10 hours ago
Southwest Airlines
Tue, Oct 28 - Sat, Nov 1
MSY
New Orleans
STL
St. Louis
$181 Roundtrip, found 9 hours ago
$181
Roundtrip
found 9 hours ago
Select Southwest Airlines flight, departing Tue, Oct 28 from New Orleans to St. Louis, returning Sat, Nov 1, priced at $181 found 9 hours ago
Southwest Airlines
Tue, Oct 28 - Sat, Nov 1
MSY
New Orleans
STL
St. Louis
$181 Roundtrip, found 9 hours ago
$181
Roundtrip
found 9 hours ago
Select Southwest Airlines flight, departing Tue, Oct 28 from New Orleans to St. Louis, returning Sat, Nov 1, priced at $181 found 9 hours ago
American Airlines
Wed, Aug 6 - Wed, Aug 13
MSY
New Orleans
STL
St. Louis
$183 Roundtrip, found 3 hours ago
$183
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Wed, Aug 6 from New Orleans to St. Louis, returning Wed, Aug 13, priced at $183 found 3 hours ago
Southwest Airlines
Thu, Oct 2 - Tue, Oct 7
MSY
New Orleans
STL
St. Louis
$183 Roundtrip, found 1 day ago
$183
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Thu, Oct 2 from New Orleans to St. Louis, returning Tue, Oct 7, priced at $183 found 1 day ago
United
Thu, Sep 11 - Sun, Sep 14
MSY
New Orleans
STL
St. Louis
$184 Roundtrip, found 1 day ago
$184
Roundtrip
found 1 day ago
Select United flight, departing Thu, Sep 11 from New Orleans to St. Louis, returning Sun, Sep 14, priced at $184 found 1 day ago
Spirit Airlines
Thu, Jul 31 - Sat, Aug 2
MSY
New Orleans
STL
St. Louis
$185 Roundtrip, found 1 day ago
$185
Roundtrip
found 1 day ago
Select Spirit Airlines flight, departing Thu, Jul 31 from New Orleans to St. Louis, returning Sat, Aug 2, priced at $185 found 1 day ago
Delta
Tue, Dec 2 - Sun, Dec 7
MSY
New Orleans
STL
St. Louis
$197 Roundtrip, found 2 hours ago
$197
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Dec 2 from New Orleans to St. Louis, returning Sun, Dec 7, priced at $197 found 2 hours ago

Find the cheapest month to fly from New Orleans (MSY) to St. Louis (STL)

August is typically the cheapest month to fly

From $113 - $426 per traveler.

Graph displaying average flight prices per month

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 $338
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $338
Flights from New Orleans (MSY) to St. Louis (STL)
Origin airport
Louis Armstrong New Orleans Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, Southwest Airlines, Spirit Airlines, United
Roundtrip price
$176
Distance
605 mi
Average flight time
2 hours 21 mins

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 October. 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 $80 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.

 

Frequently asked questions

How much does a flight from Louis Armstrong New Orleans Intl. Airport (MSY) to Lambert-St. Louis Intl. Airport (STL) cost?
Cheap round-trip flights from Louis Armstrong New Orleans Intl. Airport (MSY) to Lambert-St. Louis Intl. Airport (STL) start at $197. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Southwest Airlines flight leaving MSY on July 30 2025 and touching down at STL. The price was last updated on July 8 2025 and has not changed since.
What is the cheapest month to fly from MSY to STL?
The cheapest flights from MSY to STL are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Louis Armstrong New Orleans Intl. Airport (MSY) to Lambert-St. Louis Intl. Airport (STL)?
Jump on a direct flight with Southwest Airlines and go straight from Louis Armstrong New Orleans Intl. Airport (MSY) to Lambert-St. Louis Intl. Airport (STL).
What is the cheapest airline that flies from MSY to STL?
With fares starting at $99 for a one-way journey from MSY to STL, Southwest Airlines is currently the cheapest carrier operating this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from MSY on October 2 2025. Prices were last updated on July 8 2025 and have not changed since.
How many flights per day from Louis Armstrong New Orleans Intl. Airport (MSY) to Lambert-St. Louis Intl. Airport (STL)?
When departing from Louis Armstrong New Orleans Intl. Airport (MSY), you'll have a choice from an average of 2 daily direct flights to Lambert-St. Louis Intl. Airport (STL).
What are the most popular departure times for flights from Louis Armstrong New Orleans Intl. Airport (MSY) to Lambert-St. Louis Intl. Airport (STL)?
The 7 AM departures from MSY to STL are typically the busiest. Greater demand means you'll likely pay more for these departures. If you're hoping to save money, book during off-peak hours.
What day of the week has the most flights from MSY to STL?
Friday offers the most flights from Louis Armstrong New Orleans Intl. Airport (MSY) to Lambert-St. Louis Intl. Airport (STL). Consider leaving on this day and you'll have a greater chance of finding a departure that fits your itinerary.
What is the earliest flight from Louis Armstrong New Orleans Intl. Airport (MSY) to Lambert-St. Louis Intl. Airport (STL)?
Hop on the earliest flight at around 7:30AM UTC-6, heading out of Louis Armstrong New Orleans Intl. Airport (MSY). You'll be traveling for around 1h 50m, coming in to land at Lambert-St. Louis Intl. Airport (STL) at approximately 9:20AM UTC-6.
How long does it take to fly from Louis Armstrong New Orleans Intl. Airport (MSY) to Lambert-St. Louis Intl. Airport (STL)?
It takes around 1 hour and 50 minutes to travel the 610 mi from MSY to STL.
What airline has the least delays from MSY to STL?
With 82% of journeys usually arriving on schedule, Southwest Airlines has the best on-time performance for nonstop flights from Louis Armstrong New Orleans Intl. Airport (MSY) to Lambert-St. Louis Intl. Airport (STL). To keep track of your flight status and get notified if anything changes, simply head to the Expedia App.
What is the best time to fly from Louis Armstrong New Orleans Intl. Airport (MSY) to Lambert-St. Louis Intl. Airport (STL)?
Choose a flight from Louis Armstrong New Orleans Intl. Airport (MSY) to Lambert-St. Louis Intl. Airport (STL) that takes off before 3 PM to reduce the likelihood of delays and cancellations. Departures later than this 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 St. Louis from Louis Armstrong New Orleans Intl. Airport (MSY)?
Check out your flight options from Louis Armstrong New Orleans Intl. Airport (MSY) to Lambert-St. Louis Intl. Airport (STL). This is the only St. Louis airport you can touch down at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Louis Armstrong New Orleans Intl. Airport (MSY) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your flight from MSY to STL just before your trip is typically more expensive. But if you're flexible with your departure dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a MSY to STL flight and hotel package?
You'll typically save money by securing a MSY to STL flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. Once you've selected your ideal accommodations and flights, consider adding extras such as tours, activities and car rentals.
Can I cancel or change the date of my flight from Louis Armstrong New Orleans Intl. Airport (MSY) to Lambert-St. Louis Intl. Airport (STL)?
In most instances, you can cancel or modify your MSY to STL flight. However, additional fees may apply, especially if you booked over 24 hours ago. Check your itinerary for the airline's guidelines and fees on flight changes, or if you'd like more information, go to our Customer Service portal.

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