Best Time to Fly STL to BNA: On-Time Stats by Hour & Airline
St Louis Lambert International → Nashville International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 82.4% of St. Louis (STL) to Nashville (BNA) flights arrived on time (1,287 scheduled flights). That is 4.8 points above the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
August has been the best month (92% on time) and Monday the weakest day of the week (77%).
0.6% of flights were cancelled, versus 1.8% nationally.
STL to BNA 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 | 82.4% | 51 min | 0.6% | 1,287 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly STL to BNA
On-time arrival % by scheduled departure hour (local time), 2,550 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 95.3% | 0.0% | 43 |
| 6am–7am | 98.1% | 0.9% | 216 |
| 7am–8am | 93.4% | 1.2% | 246 |
| 8am–9am | 93.0% | 1.1% | 188 |
| 9am–10am | 88.1% | 1.7% | 120 |
| 10am–11am | 96.7% | 0.0% | 90 |
| 11am–12pm | 90.3% | 1.7% | 231 |
| 12pm–1pm | 81.3% | 0.7% | 152 |
| 1pm–2pm | 87.4% | 1.0% | 104 |
| 2pm–3pm | 78.1% | 0.5% | 189 |
| 3pm–4pm | 80.2% | 0.0% | 96 |
| 4pm–5pm | 76.9% | 1.1% | 175 |
| 5pm–6pm | 73.6% | 0.5% | 199 |
| 6pm–7pm | 68.8% | 0.0% | 218 |
| 7pm–8pm | 69.2% | 0.0% | 107 |
| 8pm–9pm | 70.8% | 0.0% | 113 |
| 9pm–10pm | 49.0% | 1.9% | 52 |
| 10pm–11pm | Limited data | 11 | |
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 BNA
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) | 80.0% | -4.7 pts | 0.0% | 45 |
| Christmas & New Year (Dec 20 - Jan 3) | 80.0% | -4.7 pts | 0.0% | 95 |
| Summer peak (Jun 15 - Aug 15) | 75.4% | -9.3 pts | 0.2% | 432 |
| All other days | 84.7% | — | 1.0% | 1,978 |
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).