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974 km · Domestic

Louis Armstrong New Orleans (MSY) – St. Louis Lambert (STL)

In July 2026, 116 flights operated between Louis Armstrong New Orleans and St. Louis Lambert (both directions), and 71.6% left on time, according to the US BTS.

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods19 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January107126▲ 17.8%
February142141▼ 0.7%
March135134▼ 0.7%
April122121▼ 0.8%
May119122▲ 2.5%
June114112▼ 1.8%
July114116▲ 1.8%
August95––
September94––
October164–in progress
November115––
December121––
Year to date (Jan–Jul)853872▲ 2.2%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January86.9%87.3%▲ 0.5%
February81.7%83.0%▲ 1.6%
March83.0%70.9%▼ 14.6%
April83.6%84.3%▲ 0.8%
May79.0%75.4%▼ 4.6%
June69.3%66.1%▼ 4.6%
July71.1%71.6%▲ 0.7%
August80.0%––
September91.5%––
October78.7%–in progress
November78.3%––
December84.3%––
Year-to-date average (Jan–Jul)79.2%76.9%▼ 2.9%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January190▼ 100.0%
February20▼ 100.0%
March12▲ 100.0%
April01–
May10▼ 100.0%
June00–
July00–
August1––
September0––
October0–in progress
November0––
December0––
Year to date (Jan–Jul)233▼ 87.0%

By direction

MSY → STL

Scheduled flights
1,333
Flights operated
1,318
Cancelled
15 · 1.1%
On-time departures
79.2%

STL → MSY

Scheduled flights
1,336
Flights operated
1,324
Cancelled
12 · 0.9%
On-time departures
80.5%

MSY → STL and STL → MSY counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 2,669 100.0% 79.9% 27

Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

Times are local to the departure airport of each flight; both directions are combined.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay07:00–08:00-0.8min · 467 recorded · 463 measured
Gap to highest-delay hour19.2min07:00 ↔ 19:00
Recorded flights2,669MSY–STL

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · Fewer than 200 measured departures · 41 recorded · 41 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 93 recorded · 91 measured · Source: the US BTS 07:00 · 94.8% · 467 recorded · 463 measured · Source: the US BTS 08:00 · 92.4% · 384 recorded · 382 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 145 recorded · 140 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 104 recorded · 104 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 45 recorded · 45 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 2 recorded · 2 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 45 recorded · 45 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 106 recorded · 106 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 80 recorded · 80 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 25 recorded · 25 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 168 recorded · 164 measured · Source: the US BTS 18:00 · 68.0% · 298 recorded · 294 measured · Source: the US BTS 19:00 · 63.6% · 276 recorded · 275 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 171 recorded · 168 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 176 recorded · 174 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 43 recorded · 43 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · Fewer than 200 measured departures · 41 recorded · 41 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 93 recorded · 91 measured · Source: the US BTS 07:00 · -0.8 min · 467 recorded · 463 measured · Source: the US BTS 08:00 · 0.9 min · 384 recorded · 382 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 145 recorded · 140 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 104 recorded · 104 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 45 recorded · 45 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 2 recorded · 2 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 45 recorded · 45 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 106 recorded · 106 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 80 recorded · 80 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 25 recorded · 25 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 168 recorded · 164 measured · Source: the US BTS 18:00 · 17.2 min · 298 recorded · 294 measured · Source: the US BTS 19:00 · 18.4 min · 276 recorded · 275 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 171 recorded · 168 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 176 recorded · 174 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 43 recorded · 43 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · 41 · 41 recorded · 41 measured · Source: the US BTS 06:00 · 93 · 93 recorded · 91 measured · Source: the US BTS 07:00 · 467 · 467 recorded · 463 measured · Source: the US BTS 08:00 · 384 · 384 recorded · 382 measured · Source: the US BTS 09:00 · 145 · 145 recorded · 140 measured · Source: the US BTS 10:00 · 104 · 104 recorded · 104 measured · Source: the US BTS 11:00 · 45 · 45 recorded · 45 measured · Source: the US BTS 12:00 · 2 · 2 recorded · 2 measured · Source: the US BTS 13:00 · 45 · 45 recorded · 45 measured · Source: the US BTS 14:00 · 106 · 106 recorded · 106 measured · Source: the US BTS 15:00 · 80 · 80 recorded · 80 measured · Source: the US BTS 16:00 · 25 · 25 recorded · 25 measured · Source: the US BTS 17:00 · 168 · 168 recorded · 164 measured · Source: the US BTS 18:00 · 298 · 298 recorded · 294 measured · Source: the US BTS 19:00 · 276 · 276 recorded · 275 measured · Source: the US BTS 20:00 · 171 · 171 recorded · 168 measured · Source: the US BTS 21:00 · 176 · 176 recorded · 174 measured · Source: the US BTS 22:00 · 43 · 43 recorded · 43 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

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View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00Fewer than 200 measured departures—4141
06:00Fewer than 200 measured departures—9193
07:0094.8%-0.8 min463467
08:0092.4%0.9 min382384
09:00Fewer than 200 measured departures—140145
10:00Fewer than 200 measured departures—104104
11:00Fewer than 200 measured departures—4545
12:00Fewer than 200 measured departures—22
13:00Fewer than 200 measured departures—4545
14:00Fewer than 200 measured departures—106106
15:00Fewer than 200 measured departures—8080
16:00Fewer than 200 measured departures—2525
17:00Fewer than 200 measured departures—164168
18:0068.0%17.2 min294298
19:0063.6%18.4 min275276
20:00Fewer than 200 measured departures—168171
21:00Fewer than 200 measured departures—174176
22:00Fewer than 200 measured departures—4343
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 78.7% · 414 recorded · 409 measured · Source: the US BTS Tuesday · 85.1% · 368 recorded · 363 measured · Source: the US BTS Wednesday · 86.9% · 366 recorded · 360 measured · Source: the US BTS Thursday · 79.7% · 407 recorded · 404 measured · Source: the US BTS Friday · 75.9% · 411 recorded · 411 measured · Source: the US BTS Saturday · 83.7% · 240 recorded · 239 measured · Source: the US BTS Sunday · 72.8% · 463 recorded · 456 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 11.8 min · 414 recorded · 409 measured · Source: the US BTS Tuesday · 4.7 min · 368 recorded · 363 measured · Source: the US BTS Wednesday · 3.3 min · 366 recorded · 360 measured · Source: the US BTS Thursday · 9.1 min · 407 recorded · 404 measured · Source: the US BTS Friday · 12.6 min · 411 recorded · 411 measured · Source: the US BTS Saturday · 7.0 min · 240 recorded · 239 measured · Source: the US BTS Sunday · 15.2 min · 463 recorded · 456 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 414 · 414 recorded · 409 measured · Source: the US BTS Tuesday · 368 · 368 recorded · 363 measured · Source: the US BTS Wednesday · 366 · 366 recorded · 360 measured · Source: the US BTS Thursday · 407 · 407 recorded · 404 measured · Source: the US BTS Friday · 411 · 411 recorded · 411 measured · Source: the US BTS Saturday · 240 · 240 recorded · 239 measured · Source: the US BTS Sunday · 463 · 463 recorded · 456 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday78.7%11.8 min409414
Tuesday85.1%4.7 min363368
Wednesday86.9%3.3 min360366
Thursday79.7%9.1 min404407
Friday75.9%12.6 min411411
Saturday83.7%7.0 min239240
Sunday72.8%15.2 min456463

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Jan · 87.1% · 252 recorded · 233 measured · Source: the US BTS Feb · 82.3% · 285 recorded · 283 measured · Source: the US BTS Mar · 77.0% · 272 recorded · 269 measured · Source: the US BTS Apr · 84.0% · 244 recorded · 243 measured · Source: the US BTS May · 77.2% · 242 recorded · 241 measured · Source: the US BTS Jun · 67.7% · 226 recorded · 226 measured · Source: the US BTS Jul · 71.3% · 230 recorded · 230 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 96 recorded · 95 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 94 recorded · 94 measured · Source: the US BTS Oct · 79.1% · 258 recorded · 258 measured · Source: the US BTS Nov · 83.7% · 227 recorded · 227 measured · Source: the US BTS Dec · 84.0% · 243 recorded · 243 measured · Source: the US BTS

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Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 6.1 min · 252 recorded · 233 measured · Source: the US BTS Feb · 6.6 min · 285 recorded · 283 measured · Source: the US BTS Mar · 12.5 min · 272 recorded · 269 measured · Source: the US BTS Apr · 6.4 min · 244 recorded · 243 measured · Source: the US BTS May · 10.0 min · 242 recorded · 241 measured · Source: the US BTS Jun · 20.2 min · 226 recorded · 226 measured · Source: the US BTS Jul · 17.3 min · 230 recorded · 230 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 96 recorded · 95 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 94 recorded · 94 measured · Source: the US BTS Oct · 7.4 min · 258 recorded · 258 measured · Source: the US BTS Nov · 8.0 min · 227 recorded · 227 measured · Source: the US BTS Dec · 5.7 min · 243 recorded · 243 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 252 · 252 recorded · 233 measured · Source: the US BTS Feb · 285 · 285 recorded · 283 measured · Source: the US BTS Mar · 272 · 272 recorded · 269 measured · Source: the US BTS Apr · 244 · 244 recorded · 243 measured · Source: the US BTS May · 242 · 242 recorded · 241 measured · Source: the US BTS Jun · 226 · 226 recorded · 226 measured · Source: the US BTS Jul · 230 · 230 recorded · 230 measured · Source: the US BTS Aug · 96 · 96 recorded · 95 measured · Source: the US BTS Sep · 94 · 94 recorded · 94 measured · Source: the US BTS Oct · 258 · 258 recorded · 258 measured · Source: the US BTS Nov · 227 · 227 recorded · 227 measured · Source: the US BTS Dec · 243 · 243 recorded · 243 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan87.1%6.1 min233252
Feb82.3%6.6 min283285
Mar77.0%12.5 min269272
Apr84.0%6.4 min243244
May77.2%10.0 min241242
Jun67.7%20.2 min226226
Jul71.3%17.3 min230230
AugFewer than 200 measured departures—9596
SepFewer than 200 measured departures—9494
Oct79.1%7.4 min258258
Nov83.7%8.0 min227227
Dec84.0%5.7 min243243

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

  • On time 79.1% 2,110
  • Delayed >15 min 19.9% 532
  • Cancelled 1.0% 27
  • Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Flight numbers on this route

37
37 of 37
Flight numbersBy direction DeparturesOn time
WN3681 MSY → STL 104 81.8%
WN4284 STL → MSY 103 80.6%
WN1527 STL → MSY 97 92.4%
WN1058 MSY → STL 91 97.7%
WN3020 MSY → STL 71 97.2%
WN748 STL → MSY 60 65.0%
WN2501 STL → MSY 58 89.7%
WN2894 MSY → STL 58 93.1%
WN1427 MSY → STL 57 98.3%
WN4500 STL → MSY 57 94.7%
WN582 MSY → STL 57 84.2%
WN714 STL → MSY 57 86.0%
WN1627 MSY → STL 51 56.9%
WN3021 MSY → STL 50 34.0%
WN3809 STL → MSY 50 84.0%
WN3864 STL → MSY 50 76.0%
WN3964 STL → MSY 50 44.0%
WN4139 MSY → STL 50 87.8%
WN4501 STL → MSY 50 72.0%
WN4780 STL → MSY 50 94.0%
WN2782 MSY → STL 49 57.1%
WN1145 STL → MSY 47 93.6%
WN1137 STL → MSY 46 82.6%
WN2948 MSY → STL 45 91.1%
WN4191 STL → MSY 43 81.4%
WN600 MSY → STL 42 78.6%
WN290 MSY → STL 39 89.7%
WN3697 MSY → STL 36 88.9%
WN1509 MSY → STL 33 93.9%
WN2114 STL → MSY 33 78.8%
WN212 MSY → STL 33 45.5%
WN4163 STL → MSY 33 78.8%
WN623 STL → MSY 33 84.9%
WN725 STL → MSY 33 65.6%
WN4491 MSY → STL 32 58.1%
WN1344 STL → MSY 31 83.9%
WN752 MSY → STL 31 77.4%

Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.

Monthly figures
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 116 +1.8% 0 71.6%
June 2026 112 −1.8% 0 66.1%
May 2026 122 +2.5% 0 75.4%
April 2026 121 −0.8% 1 84.3%
March 2026 134 −0.7% 2 70.9%
February 2026 141 −0.7% 0 83.0%
January 2026 126 +17.8% 0 87.3%
December 2025 121 −0.8% 0 84.3%
November 2025 115 +2.7% 0 78.3%
October 2025 164 +74.5% 0 78.7%
September 2025 94 0 91.5%
August 2025 95 1 80.0%
July 2025 114 0 71.1%
June 2025 114 0 69.3%
May 2025 119 1 79.0%
April 2025 122 0 83.6%
March 2025 135 1 83.0%
February 2025 142 2 81.7%
January 2025 107 19 86.9%
December 2024 122 0 83.6%
November 2024 112 0 89.3%
October 2024 94 0 79.8%

How to read this chart

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