Best Time to Fly BNA to BWI: On-Time Stats by Hour & Airline
Nashville International → Baltimore/Washington International Thurgood Marshall
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 77.2% of Nashville (BNA) to Baltimore (BWI) flights arrived on time (1,813 scheduled flights). That is in line with the national average of 77.6%.
Southwest Airlines was the most punctual of the 2 airlines on the route at 77.2%, while Spirit Airlines trailed at 76.9%.
January has been the best month (90% on time) and Monday the weakest day of the week (77%).
1.8% of flights were cancelled, versus 1.8% nationally.
BNA to BWI 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 | 77.2% | 52 min | 1.8% | 1,759 |
| Spirit Airlines | 76.9% | 54 min | 3.7% | 54 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BNA to BWI
On-time arrival % by scheduled departure hour (local time), 3,768 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 98.7% | 1.7% | 234 |
| 6am–7am | 91.0% | 0.8% | 358 |
| 7am–8am | 93.3% | 0.9% | 212 |
| 8am–9am | 94.0% | 1.7% | 119 |
| 9am–10am | 92.4% | 1.2% | 320 |
| 10am–11am | 88.4% | 3.2% | 126 |
| 11am–12pm | 87.1% | 0.7% | 148 |
| 12pm–1pm | 82.2% | 1.2% | 165 |
| 1pm–2pm | 74.0% | 1.7% | 405 |
| 2pm–3pm | 88.4% | 2.2% | 179 |
| 3pm–4pm | 83.2% | 2.4% | 208 |
| 4pm–5pm | 70.1% | 1.2% | 169 |
| 5pm–6pm | 62.6% | 2.2% | 227 |
| 6pm–7pm | 68.2% | 2.2% | 275 |
| 7pm–8pm | 73.0% | 1.5% | 271 |
| 8pm–9pm | 51.1% | 1.1% | 187 |
| 9pm–10pm | 61.3% | 2.7% | 146 |
| 10pm–11pm | Limited data | 19 | |
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 BWI
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) | 81.5% | -0.8 pts | 0.0% | 65 |
| Christmas & New Year (Dec 20 - Jan 3) | 82.0% | -0.4 pts | 1.5% | 135 |
| Summer peak (Jun 15 - Aug 15) | 68.9% | -13.4 pts | 2.4% | 663 |
| All other days | 82.3% | — | 1.5% | 2,905 |
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).