Best Time to Fly BNA to STL: On-Time Stats by Hour & Airline
Nashville International → St Louis Lambert International
Data through July 2026 · Last updated October 18, 2026
1,286 flights were scheduled from Nashville (BNA) to St. Louis (STL) in the last 12 months, and 79.4% of those that flew arrived on time, 1.8 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 (90% on time) and Sunday the weakest day of the week (78%).
0.9% of flights were cancelled, versus 1.8% nationally.
BNA to STL 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 | 79.4% | 51 min | 0.9% | 1,286 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BNA to STL
On-time arrival % by scheduled departure hour (local time), 2,559 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 10 | |
| 6am–7am | 96.4% | 1.8% | 171 |
| 7am–8am | 94.8% | 1.6% | 252 |
| 8am–9am | 95.8% | 0.9% | 217 |
| 9am–10am | 90.6% | 8.6% | 58 |
| 10am–11am | 91.1% | 0.0% | 56 |
| 11am–12pm | 82.2% | 1.0% | 102 |
| 12pm–1pm | 85.6% | 0.9% | 105 |
| 1pm–2pm | 80.0% | 0.9% | 217 |
| 2pm–3pm | 79.0% | 2.8% | 108 |
| 3pm–4pm | 85.5% | 0.0% | 69 |
| 4pm–5pm | 70.6% | 0.0% | 68 |
| 5pm–6pm | 75.0% | 0.7% | 137 |
| 6pm–7pm | 76.7% | 1.4% | 209 |
| 7pm–8pm | 58.7% | 0.7% | 144 |
| 8pm–9pm | 83.2% | 0.0% | 232 |
| 9pm–10pm | 75.7% | 0.8% | 245 |
| 10pm–11pm | 67.7% | 2.5% | 159 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BNA to STL
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) | 77.3% | -5.6 pts | 2.2% | 45 |
| Christmas & New Year (Dec 20 - Jan 3) | 86.6% | +3.8 pts | 0.0% | 97 |
| Summer peak (Jun 15 - Aug 15) | 77.6% | -5.3 pts | 0.7% | 431 |
| All other days | 82.8% | — | 1.4% | 1,986 |
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).