Airport month record
MSYJUL
Louis Armstrong New Orleans International in July 2025
- Departures
- 4,039
- Month
- July 2025
- National, same month
- 71.1%
- Carriers
- 12
Historical statistics for July 2025, not live status or a forecast for this year’s July. For today’s conditions at MSY, see live FAA status.
MSY in July sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, about a point better than the national rate of 71.1%. The late ones land a little over an hour behind schedule. That rests on 4,039 flights, of which Delta Air Lines flew 611 at 79.1% on time.
Delta Air Lines is the most reliable of the four carriers covered here at 79.1% on time across 611 flights.
Key figures
On time
71.9%
Arrivals under 15 minutes late, of 3,936 completed departures
Avg delay
82 min
Across delayed arrivals only, not all flights
Cancelled
1.81%
Nationally in July: 2.45%
Whole year
78.5%
MSY across all twelve months
These figures cover 4,039 departures from Louis Armstrong New Orleans International in July 2025. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.
Against the year
July next to MSY's other months
Against MSY's own year, July ran 7 points worse than the twelve-month rate of 78.5%, which makes it number eleven of twelve months, best first.
| Month | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| July 2025 (this page) | 4,039 | 71.9% | 82 min | 1.81% | C |
| August 2025 | 3,739 | 80.2% | 80 min | 1.10% | B |
| September 2025 | 3,619 | 85.9% | 70 min | 0.36% | A+ |
| October 2025 | 4,699 | 78.9% | 56 min | 0.53% | B+ |
| November 2025 | 4,314 | 81.1% | 80 min | 1.27% | B |
| December 2025 | 4,152 | 78.0% | 74 min | 1.28% | B |
| January 2026 | 3,901 | 84.9% | 72 min | 4.13% | B− |
| February 2026 | 4,111 | 82.8% | 68 min | 1.82% | B |
| March 2026 | 4,485 | 75.3% | 75 min | 2.79% | B |
| April 2026 | 4,428 | 80.1% | 63 min | 0.65% | B+ |
| May 2026 | 4,194 | 73.5% | 69 min | 0.83% | C+ |
| June 2026 | 3,709 | 70.0% | 78 min | 1.11% | C |
Departure window
The best time of day to leave MSY in July
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 33 points, against 12 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am926 flights89.4%
- 8am–11am684 flights85.8%
- 11am–2pm607 flights71.1%
- 2pm–5pm733 flights58.3%
- 5pm–8pm839 flights56.5%
- 8pm–5am250 flights60.2%
Scale runs 50% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 56.5% on time, against 89.4% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5am–8am window is the busiest, with 926 flights scheduled in it.
Across the week, Tuesday is the strongest day at 78.1% on time and Thursday the weakest at 65.1%. 13 points is a smaller lever than departure hour, but it is free.
Carrier by carrier
Which airlines ran best at MSY in July
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 79.1% of the time; American Airlines manages 67.3%. Sample sizes sit next to every figure, because a two-point gap across 618 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 1,511 | 71.1% | 65 min | 0.86% | C+ |
| American Airlines | 618 | 67.3% | 98 min | 2.91% | C |
| Delta Air Lines | 611 | 79.1% | 79 min | 1.80% | B |
| United Airlines | 483 | 72.9% | 94 min | 1.24% | C |
| Spirit Airlinesthin sample | 347 | 73.2% | 65 min | 2.02% | C |
| Envoy Airthin sample | 98 | 76.5% | 128 min | 0.00% | B+ |
| SkyWest Airlinesthin sample | 84 | 79.8% | 94 min | 0.00% | B+ |
| PSA Airlinesthin sample | 77 | 60.3% | 162 min | 15.58% | D− |
| JetBlue Airwaysthin sample | 62 | 49.2% | 113 min | 3.23% | F− |
| Alaska Airlinesthin sample | 61 | 70.5% | 48 min | 0.00% | C+ |
| Republic Airwaysthin sample | 49 | 75.6% | 166 min | 6.12% | B− |
| Frontier Airlinesthin sample | 38 | 59.5% | 85 min | 2.63% | D |
Delta leads American by 12 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
Route by route
Busiest routes out of MSY in July
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| MSY to ATL · Atlantathin sample | 340 | 79.8% | 61 min | 1.18% | B |
| MSY to DFW · Dallas-Fort Worththin sample | 254 | 56.8% | 105 min | 3.94% | D− |
| MSY to IAH · Houstonthin sample | 242 | 72.5% | 86 min | 1.65% | C |
| MSY to MCO · Orlandothin sample | 221 | 68.3% | 74 min | 0.00% | C+ |
| MSY to AUS · Austinthin sample | 193 | 72.4% | 86 min | 0.52% | C+ |
| MSY to ORD · Chicagothin sample | 181 | 74.0% | 89 min | 0.00% | C+ |
| MSY to HOU · Houstonthin sample | 180 | 73.6% | 70 min | 0.56% | C+ |
| MSY to DAL · Dallasthin sample | 168 | 71.5% | 55 min | 1.79% | C |
| MSY to CLT · Charlottethin sample | 166 | 79.4% | 67 min | 0.60% | B+ |
| MSY to DEN · Denverthin sample | 160 | 73.0% | 81 min | 0.62% | C+ |
| MSY to DCA · Washingtonthin sample | 150 | 63.3% | 147 min | 10.00% | D− |
| MSY to LAX · Los Angelesthin sample | 145 | 80.0% | 98 min | 0.00% | B+ |
| MSY to MIA · Miamithin sample | 131 | 75.2% | 83 min | 3.05% | B− |
| MSY to BNA · Nashvillethin sample | 128 | 73.0% | 60 min | 0.78% | C+ |
| MSY to LGA · New Yorkthin sample | 119 | 65.8% | 99 min | 4.20% | C− |
| MSY to BWI · Baltimorethin sample | 112 | 75.0% | 57 min | 3.57% | B− |
| MSY to MDW · Chicagothin sample | 97 | 78.4% | 52 min | 0.00% | B+ |
| MSY to JFK · New Yorkthin sample | 92 | 65.9% | 78 min | 9.78% | C− |
| MSY to PHL · Philadelphiathin sample | 86 | 72.5% | 121 min | 5.81% | C− |
| MSY to FLL · Fort Lauderdalethin sample | 82 | 66.7% | 62 min | 0.00% | C+ |
| MSY to LAS · Las Vegasthin sample | 80 | 76.2% | 49 min | 0.00% | B+ |
| MSY to TPA · Tampathin sample | 73 | 74.6% | 86 min | 1.37% | C |
| MSY to DTW · Detroitthin sample | 71 | 82.9% | 45 min | 1.41% | B |
| MSY to EWR · Newarkthin sample | 65 | 62.9% | 137 min | 3.08% | D− |
| MSY to BOS · Bostonthin sample | 62 | 50.0% | 122 min | 0.00% | F+ |
Delay causes
What held MSY up in July
One category carries most of the weight here. Late-arriving aircraft accounts for 46% of the 91,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 46%Late-arriving aircraft
- 29%Carrier
- 19%National Airspace System
- 6%Extreme weather
- 0%Security
46% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 91,000 reported delay minutes here, that single category outweighs weather by 8 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 90,708 reported delay minutes.
Cancellations sit at 1.81% against a national 2.45%, which is ordinary. Diversions add another 0.74%.
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.0% of arrivals land a full hour or more behind schedule, against 12.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
What to do with this
Flying from MSY in July
For a July trip through MSY: plan on this being one of the airport's harder months. The 5am–8am departures held up best at 89.4% on time, and with 11.0% of arrivals an hour or more late, a connection here deserves more slack than the same trip in September would.
Related
Where to go next
- Louis Armstrong New Orleans International (MSY), the whole year
- MSY in August80.2%
- MSY in September85.9%
- MSY in October78.9%
- MSY in November81.1%
- MSY in December78.0%
- MSY in January84.9%
- MSY in February82.8%
- MSY in March75.3%
- MSY in April80.1%
- MSY in May73.5%
- MSY in June70.0%
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.