Best Time to Fly STL to MSY: On-Time Stats by Hour & Airline
St Louis Lambert International → Louis Armstrong New Orleans International
Data through July 2026 · Last updated October 18, 2026
733 flights were scheduled from St. Louis (STL) to New Orleans (MSY) in the last 12 months, and 83.6% of those that flew arrived on time, 6.0 points above the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
September has been the best month (94% on time) and Sunday the weakest day of the week (80%).
0.1% of flights were cancelled, versus 1.8% nationally.
STL to MSY on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlines | 83.6% | 57 min | 0.1% | 733 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly STL to MSY
On-time arrival % by scheduled departure hour (local time), 1,465 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 1 | |
| 7am–8am | 93.8% | 0.0% | 64 |
| 8am–9am | 92.4% | 0.6% | 346 |
| 9am–10am | 87.4% | 3.4% | 148 |
| 10am–11am | 89.6% | 0.0% | 96 |
| 11am–12pm | Limited data | 16 | |
| 12pm–1pm | Limited data | 1 | |
| 1pm–2pm | Limited data | 1 | |
| 2pm–3pm | 88.7% | 0.0% | 53 |
| 3pm–4pm | 74.4% | 0.0% | 82 |
| 4pm–5pm | 82.3% | 2.9% | 35 |
| 5pm–6pm | 91.1% | 0.0% | 56 |
| 6pm–7pm | 72.4% | 1.9% | 107 |
| 7pm–8pm | 86.0% | 0.0% | 86 |
| 8pm–9pm | 83.9% | 1.4% | 145 |
| 9pm–10pm | 64.8% | 1.1% | 184 |
| 10pm–11pm | 72.7% | 0.0% | 44 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on STL to MSY
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 29 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 91.7% | +6.6 pts | 0.0% | 60 |
| Summer peak (Jun 15 - Aug 15) | 75.3% | -9.7 pts | 0.0% | 224 |
| All other days | 85.1% | — | 1.2% | 1,152 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).