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Cheap flights from New Orleans to St. Louis from $55

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from New Orleans to St. Louis departing on 12/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
2:02 pm - 10:33 pmMSY-STL
8h 31m1 stop
Frontier Logo
10:47 am - 4:27 pmSTL-MSY
5h 40m1 stop
$110Frontier
Find Deal
Thu, Dec 11 - Mon, Dec 15
Frontier Logo
8:14 am - 10:33 pmMSY-STL
14h 19m1 stop
Frontier Logo
10:57 am - 4:27 pmSTL-MSY
5h 30m1 stop
$121Frontier
Find Deal
Sun, Dec 21 - Sun, Jan 4
Frontier Logo
8:14 am - 10:33 pmMSY-STL
14h 19m1 stop
Frontier Logo
10:42 am - 4:27 pmSTL-MSY
5h 45m1 stop
$126Frontier
Find Deal
Sun, Dec 21 - Thu, Jan 1
Multiple Airlines Logo
5:00 pm - 9:40 amMSY-STL
16h 40m1 stop
Multiple Airlines Logo
10:42 am - 4:27 pmSTL-MSY
5h 45m1 stop
$128Multiple Airlines
Find Deal
Wed, Dec 24 - Thu, Jan 1
Frontier Logo
11:02 am - 11:33 pmMSY-STL
12h 31m1 stop
Frontier Logo
4:45 pm - 9:06 amSTL-MSY
16h 21m1 stop
$129Frontier
Find Deal
Fri, Jan 23 - Sun, Jan 25
Frontier Logo
5:22 pm - 9:45 amMSY-STL
16h 23m2 stops
Frontier Logo
10:42 am - 4:27 pmSTL-MSY
5h 45m1 stop
$130Frontier
Find Deal
Sun, Dec 21 - Thu, Jan 1
Multiple Airlines Logo
5:00 pm - 9:40 amMSY-STL
16h 40m1 stop
Multiple Airlines Logo
10:42 am - 4:27 pmSTL-MSY
5h 45m1 stop
$134Multiple Airlines
Find Deal
Mon, Dec 22 - Thu, Jan 1
Frontier Logo
3:39 pm - 10:02 amMSY-STL
18h 23m1 stop
Frontier Logo
10:57 am - 4:27 pmSTL-MSY
5h 30m1 stop
$143Frontier
Find Deal
Thu, Dec 18 - Sun, Dec 21
Frontier Logo
8:14 am - 10:33 pmMSY-STL
14h 19m1 stop
Frontier Logo
10:48 am - 3:55 pmSTL-MSY
5h 07m1 stop
$145Frontier
Find Deal
Sun, Dec 21 - Tue, Dec 30
Multiple Airlines Logo
5:00 pm - 9:40 amMSY-STL
16h 40m1 stop
Multiple Airlines Logo
10:48 am - 3:55 pmSTL-MSY
5h 07m1 stop
$147Multiple Airlines
Find Deal
Wed, Dec 24 - Tue, Dec 30

Frontier flights from New Orleans to St. Louis

Our best Frontier deals on New Orleans to St. Louis flight tickets
Frontier
Dec 11
MSY2:02 pmNew Orleans Louis Armstrong
8h 31m
1 stop
STL10:33 pmLambert-St Louis
Dec 15
STL10:47 amLambert-St Louis
5h 40m
1 stop
MSY4:27 pmNew Orleans Louis Armstrong
$110
Find similar
Frontier
Dec 21
MSY8:14 amNew Orleans Louis Armstrong
14h 19m
1 stop
STL10:33 pmLambert-St Louis
Jan 4
STL10:57 amLambert-St Louis
5h 30m
1 stop
MSY4:27 pmNew Orleans Louis Armstrong
$121
Find similar
Frontier
Dec 21
MSY8:14 amNew Orleans Louis Armstrong
14h 19m
1 stop
STL10:33 pmLambert-St Louis
Jan 1
STL10:42 amLambert-St Louis
5h 45m
1 stop
MSY4:27 pmNew Orleans Louis Armstrong
$126
Find similar

Southwest flights from New Orleans to St. Louis

Our best Southwest deals on New Orleans to St. Louis flight tickets
Southwest
Nov 26
MSY5:20 pmNew Orleans Louis Armstrong
6h 10m
1 stop
STL11:30 pmLambert-St Louis
Nov 29
STL8:40 pmLambert-St Louis
1h 45m
MSY10:25 pmNew Orleans Louis Armstrong
$511
Find similar
Southwest
Nov 28
MSY7:45 pmNew Orleans Louis Armstrong
1h 45m
STL9:30 pmLambert-St Louis
Nov 30
STL7:10 amLambert-St Louis
1h 50m
MSY9:00 amNew Orleans Louis Armstrong
$527
Find similar
Southwest
Nov 21
MSY7:30 pmNew Orleans Louis Armstrong
3h 40m
1 stop
STL11:10 pmLambert-St Louis
Nov 28
STL8:55 amLambert-St Louis
1h 50m
MSY10:45 amNew Orleans Louis Armstrong
$590
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from New Orleans to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 14, 2025.
Use the filters below to find and compare flights from New Orleans to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

New OrleansSt. Louis

MSY - STL

MSYSTL

New Orleans Louis Armstrong

Thu 12/11

2:02 pm-10:33 pm

1 stop8h 31m

Lambert-St Louis

Mon 12/15

10:47 am-4:27 pm

1 stop5h 40m

$110

New OrleansSt. Louis

MSY - STL

MSYSTL

New Orleans Louis Armstrong

Sun 12/21

8:14 am-10:33 pm

1 stop14h 19m

Lambert-St Louis

Sun 1/4

10:57 am-4:27 pm

1 stop5h 30m

$121

New OrleansSt. Louis

MSY - STL

MSYSTL

New Orleans Louis Armstrong

Sun 12/21

8:14 am-10:33 pm

1 stop14h 19m

Lambert-St Louis

Thu 1/1

10:42 am-4:27 pm

1 stop5h 45m

$126

New OrleansSt. Louis

MSY - STL

MSYSTL

New Orleans Louis Armstrong

Wed 12/24

5:00 pm-9:40 am

1 stop16h 40m

Lambert-St Louis

Thu 1/1

10:42 am-4:27 pm

1 stop5h 45m

$128

New OrleansSt. Louis

MSY - STL

MSYSTL

New Orleans Louis Armstrong

Fri 1/23

11:02 am-11:33 pm

1 stop12h 31m

Lambert-St Louis

Sun 1/25

4:45 pm-9:06 am

1 stop16h 21m

$129

New OrleansSt. Louis

MSY - STL

MSYSTL

New Orleans Louis Armstrong

Sun 12/21

5:22 pm-9:45 am

2 stops16h 23m

Lambert-St Louis

Thu 1/1

10:42 am-4:27 pm

1 stop5h 45m

$130

New OrleansSt. Louis

MSY - STL

MSYSTL

New Orleans Louis Armstrong

Mon 12/22

5:00 pm-9:40 am

1 stop16h 40m

Lambert-St Louis

Thu 1/1

10:42 am-4:27 pm

1 stop5h 45m

$134

New OrleansSt. Louis

MSY - STL

MSYSTL

New Orleans Louis Armstrong

Thu 12/18

3:39 pm-10:02 am

1 stop18h 23m

Lambert-St Louis

Sun 12/21

10:57 am-4:27 pm

1 stop5h 30m

$143

New OrleansSt. Louis

MSY - STL

MSYSTL

New Orleans Louis Armstrong

Sun 12/21

8:14 am-10:33 pm

1 stop14h 19m

Lambert-St Louis

Tue 12/30

10:48 am-3:55 pm

1 stop5h 07m

$145

New OrleansSt. Louis

MSY - STL

MSYSTL

New Orleans Louis Armstrong

Wed 12/24

5:00 pm-9:40 am

1 stop16h 40m

Lambert-St Louis

Tue 12/30

10:48 am-3:55 pm

1 stop5h 07m

$147

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from New Orleans to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to St. Louis?

In general, May is the cheapest month to fly from New Orleans to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $342. The month of December is another great option to travel to St. Louis, with average flight prices from New Orleans averaging around $349.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $356. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $531. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from New Orleans at noon is the least expensive time of day to depart. momondo users have found prices as low as $377 when looking at flights departing at noon. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $395 per ticket.

What is the cheapest New Orleans Louis Armstrong to Lambert-St Louis flight route?

Fly from New Orleans Louis Armstrong to Lambert-St Louis for the best New Orleans Louis Armstrong - Lambert-St Louis flight prices

What cabin class options are available on New Orleans Louis Armstrong to Lambert-St Louis flights?

There is only 1 cabin class available to choose from on New Orleans Louis Armstrong to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on New Orleans to St. Louis flights?

You could potentially save up to 16% on your flight if you consider stops on a New Orleans to St. Louis flight.

How have New Orleans to St. Louis flight prices changed over time?

As of November 2025, prices for New Orleans to St. Louis flights are approximately 94% more expensive when compared to flights at the same time last year.

When to book flights from New Orleans to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from New Orleans to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap New Orleans to St. Louis (MSY to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from New Orleans to St. Louis

Best Price Found

$142

Fastest flight time

1h 45m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from New Orleans in the past 72 hours is $142. The best round-trip flight deal from New Orleans to St. Louis found on momondo in the last 72 hours is $226.
The fastest flight from New Orleans to St. Louis takes 1h 45m
Direct flights go from New Orleans to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
Search flight deals

  • How far is New Orleans Louis Armstrong to Lambert-St Louis by plane?

    The distance between New Orleans Louis Armstrong and Lambert-St Louis is about 599.0 mi. Flights usually cover this in 5h 29m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from New Orleans Louis Armstrong Airport to Lambert-St Louis Airport?

    Prices for flights from New Orleans Louis Armstrong Airport to Lambert-St Louis Airport are updated daily.

  • How many operators does momondo search for flights from New Orleans Louis Armstrong Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from New Orleans Louis Armstrong Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from New Orleans Louis Armstrong Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from New Orleans to St. Louis?

  • What is the most popular airline from New Orleans to St. Louis?

Best airlines flying from New Orleans to St. Louis

Compare and see reviews for airlines that fly from New Orleans to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $72Free CancellationRating
5.8
3,109 reviews
Search Frontier flights
DeltaPriceFrom $196Free CancellationRating
7.9
8,012 reviews
Search Delta flights
United AirlinesPriceFrom $218Free CancellationRating
7.4
9,017 reviews
Search United Airlines flights
American AirlinesPriceFrom $248Free CancellationRating
7.2
11,049 reviews
Search American Airlines flights
SouthwestPriceFrom $278Free CancellationRating
8.0
4,244 reviews
Search Southwest flights

  • Southwest Flights From New Orleans to St. Louis

    The lowest priced Southwest flight from New Orleans to St. Louis from the last 72 hours was $278. Generally, Southwest has 15 flights on this route every week with an average price of $393. Southwest is rated 8.0/10 by our users.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
Eureka
Litchfield
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from New Orleans to St. Louis?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to St. Louis from New Orleans.

Can I find flights from New Orleans to St. Louis with flexible booking policies on momondo?

Yes. All flights to St. Louis from New Orleans on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from New Orleans to St. Louis?

Once all potential New Orleans to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from New Orleans to St. Louis right now. Can momondo alert me if prices change?

If you are not ready to book a flight from New Orleans to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.

An easier way to manage your St. Louis trip

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