PlainFlights

Route · STL → MSY · 2020–2025 BTS data

St. Louis to New Orleans

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), STL to MSY (St. Louis to New Orleans) ranks #3220 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

82.4%
On-time
+3.4 pts
vs US avg
59 min
Delay when late
3,221
Flights
#3220 of 4927
Corpus placement

Cancelled

1.1%

Best Month

Sep 2024 94%

Worst Month

Jul 2024 54%

Distance

604 mi

Carriers

1

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 61 9 0 0 WN
Nov 2025 57 10 0 0 WN
Oct 2025 82 17 0 0 WN
Sep 2025 47 3 0 0 WN
Aug 2025 48 4 0 0 WN
Jul 2025 57 14 0 0 WN
Jun 2025 57 19 0 0 WN
May 2025 60 10 0 0 WN
Apr 2025 61 12 0 0 WN
Mar 2025 68 13 0 0 WN
Feb 2025 72 14 0 0 WN
Jan 2025 64 7 11 0 WN
Dec 2024 61 5 0 0 WN
Nov 2024 56 4 0 0 WN
Oct 2024 72 7 0 0 WN
Sep 2024 51 3 2 0 WN
Aug 2024 53 9 0 0 WN
Jul 2024 57 26 0 0 WN
Jun 2024 56 8 0 0 WN
May 2024 60 18 0 0 WN
Apr 2024 61 11 2 0 WN
Mar 2024 65 15 0 1 WN
Feb 2024 54 4 0 0 WN
Jan 2024 58 18 1 0 WN

STL–MSY seasonal on-time pattern

Best: September (89.4%) · weakest: July (69.0%)

65%70%75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 83.5%

Strongest calendar month

September

89.4% on-time · ~52 flights/mo

Busiest calendar month

March

~63 flights/mo avg

Weakest calendar month

July

69.0% on-time · ~58 flights/mo

Cancellation Rate

1.1%

16 of 1,438 flights

Diversion Rate

0.1%

1 of 1,438 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

STL - St. Louis

Full on-time, delay-cause, and seasonal performance for St. Louis, MO.

STL on-time profile

MSY - New Orleans

Full on-time, delay-cause, and seasonal performance for New Orleans, LA.

MSY on-time profile

Compare the two airports

See STL and MSY side by side on delays, cancellations, and reliability.

Compare STL vs MSY

Origin-hub reliability standing

Mid-pack among STL departures

From STL, this corridor sits with 45 other 75–85% on-time routes out of 51 tracked departures, not the hub's reliability leaders (5 at ≥85%) and not the softest ( 1 below 75%). Destination: New Orleans · fleet on-time rank #2208 of 4927.

What the Data Says About STL to MSY

Bureau of Transportation Statistics records show St. Louis to New Orleans (STL to MSY) running a 82.4% on-time rate over 3,221 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 59.3 minutes. The 604-mile corridor is served by 1 carrier, and over the last 24 months 1.1% of 1,438 flights were cancelled, 0.1% diverted.

The monthly split is wide on this route: Sep 2024 posted the strongest performance at 94% on-time, while Jul 2024 came in at just 54% - a 40-point swing worth factoring into travel timing.

On the multi-year calendar, STL–MSY peaks in September at 89.4% on-time while March carries the heaviest traffic (~63 flights per month) ; the softest month is July at 69.0%, a 20.4-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does STL to MSY rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, STL to MSY ranks #3220 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from STL to MSY? ▼
Flights from St. Louis to New Orleans have a 82.4% on-time rate based on 3,221 flights. The average delay is 59.3 minutes. The best recent month was Sep 2024 with 94% on-time.
What is the cancellation rate for STL to MSY? ▼
Over the last 24 months, 1.1% of flights on this route were cancelled (16 of 1,438 flights) and 0.1% were diverted.
How far is the flight from STL to MSY? ▼
The flight distance from St. Louis (STL) to New Orleans (MSY) is approximately 604 miles. This route is served by 1 carrier.
When is the best time to fly from STL to MSY? ▼
The best recent month for on-time performance was Sep 2024 (94% on-time). The worst was Jul 2024 (54% on-time). Consider booking during months with historically better performance.

Airports on this route

STL Airport

St. Louis
MSY Airport

New Orleans
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using STL–MSY data

STL–MSY runs 3.4 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare STL and MSY airport profiles: delay causes and top routes differ even on the same corridor. STL airport
  • If your dates flex, September (89.4% on-time) beats July (69.0%) on this corridor. Seasonal chart
  • 4 other routes post a similar 82.4% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.