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Route · MSY → STL · 2020–2025 BTS data

New Orleans to St. Louis

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), MSY to STL (New Orleans to St. Louis) ranks #3214 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

82.7%
On-time
+3.7 pts
vs US avg
60 min
Delay when late
3,239
Flights
#3214 of 4927
Corpus placement

Cancelled

1.2%

Best Month

Apr 2024 93%

Worst Month

Jun 2025 74%

Distance

604 mi

Carriers

1

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 60 6 0 0 WN
Nov 2025 58 10 0 0 WN
Oct 2025 82 14 0 0 WN
Sep 2025 47 5 0 0 WN
Aug 2025 48 9 1 0 WN
Jul 2025 57 13 0 0 WN
Jun 2025 57 15 0 0 WN
May 2025 60 11 1 0 WN
Apr 2025 61 9 0 0 WN
Mar 2025 68 8 1 0 WN
Feb 2025 72 14 2 0 WN
Jan 2025 62 5 8 1 WN
Dec 2024 61 9 0 0 WN
Nov 2024 56 6 0 0 WN
Oct 2024 72 14 0 0 WN
Sep 2024 51 7 1 0 WN
Aug 2024 52 5 0 0 WN
Jul 2024 57 13 0 0 WN
Jun 2024 56 10 0 0 WN
May 2024 60 13 0 0 WN
Apr 2024 61 4 1 0 WN
Mar 2024 66 12 0 0 WN
Feb 2024 58 11 0 0 WN
Jan 2024 61 16 2 0 WN

MSY–STL seasonal on-time pattern

Best: April (87.1%) · weakest: July (74.1%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 82.7%

Strongest calendar month

April

87.1% on-time · ~57 flights/mo

Busiest calendar month

March

~65 flights/mo avg

Weakest calendar month

July

74.1% on-time · ~58 flights/mo

Cancellation Rate

1.2%

17 of 1,443 flights

Diversion Rate

0.1%

1 of 1,443 flights

Explore origin & destination

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

MSY - New Orleans

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

MSY on-time profile

STL - St. Louis

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

STL on-time profile

Compare the two airports

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

Compare MSY vs STL

Origin-hub reliability standing

Mid-pack among MSY departures

From MSY, this corridor sits with 28 other 75–85% on-time routes out of 34 tracked departures, not the hub's reliability leaders (5 at ≥85%) and not the softest ( 1 below 75%). Destination: St. Louis · fleet on-time rank #2075 of 4927.

What the Data Says About MSY to STL

Bureau of Transportation Statistics records show New Orleans to St. Louis (MSY to STL) running a 82.7% on-time rate over 3,239 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 59.8 minutes. The 604-mile corridor is served by 1 carrier, and over the last 24 months 1.2% of 1,443 flights were cancelled, 0.1% diverted.

The monthly split is wide on this route: Apr 2024 posted the strongest performance at 93% on-time, while Jun 2025 came in at just 74% - a 20-point swing worth factoring into travel timing.

On the multi-year calendar, MSY–STL peaks in April at 87.1% on-time while March carries the heaviest traffic (~65 flights per month) ; the softest month is July at 74.1%, a 13.0-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does MSY to STL rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, MSY to STL ranks #3214 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 MSY to STL? ▼
Flights from New Orleans to St. Louis have a 82.7% on-time rate based on 3,239 flights. The average delay is 59.8 minutes. The best recent month was Apr 2024 with 93% on-time.
What is the cancellation rate for MSY to STL? ▼
Over the last 24 months, 1.2% of flights on this route were cancelled (17 of 1,443 flights) and 0.1% were diverted.
How far is the flight from MSY to STL? ▼
The flight distance from New Orleans (MSY) to St. Louis (STL) is approximately 604 miles. This route is served by 1 carrier.
When is the best time to fly from MSY to STL? ▼
The best recent month for on-time performance was Apr 2024 (93% on-time). The worst was Jun 2025 (74% on-time). Consider booking during months with historically better performance.

Airports on this route

MSY Airport

New Orleans
STL Airport

St. Louis
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 MSY–STL data

MSY–STL runs 3.7 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare MSY and STL airport profiles: delay causes and top routes differ even on the same corridor. MSY airport
  • If your dates flex, April (87.1% on-time) beats July (74.1%) on this corridor. Seasonal chart
  • 4 other routes post a similar 82.7% 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.