Best Time to Fly BNA to IAD: On-Time Stats by Hour & Airline
Nashville International → Washington Dulles International
Data through July 2026 · Last updated October 18, 2026
1,008 flights were scheduled from Nashville (BNA) to Washington (IAD) in the last 12 months, and 79.0% of those that flew arrived on time, 1.4 points above the US average of 77.6%.
Republic Airways was the most punctual of the 3 airlines on the route at 83.8%, while United Airlines trailed at 78.7%.
August has been the best month (87% on time) and Sunday the weakest day of the week (74%).
1.2% of flights were cancelled, versus 1.8% nationally.
BNA to IAD 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 |
|---|---|---|---|---|
| Republic Airways | 83.8% | 78 min | 0.0% | 37 |
| Allegiant Air | 81.1% | 111 min | 2.6% | 38 |
| United Airlines | 78.7% | 88 min | 1.2% | 932 |
| Southwest Airlines | Limited data | 1 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BNA to IAD
On-time arrival % by scheduled departure hour (local time), 2,016 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 1 | |
| 7am–8am | Limited data | 5 | |
| 8am–9am | 90.2% | 1.7% | 538 |
| 9am–10am | Limited data | 3 | |
| 10am–11am | Limited data | 2 | |
| 11am–12pm | 86.7% | 0.9% | 114 |
| 12pm–1pm | 91.7% | 0.0% | 36 |
| 1pm–2pm | 79.0% | 0.5% | 673 |
| 5pm–6pm | Limited data | 2 | |
| 6pm–7pm | 71.7% | 0.8% | 642 |
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 IAD
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) | 78.6% | -2.8 pts | 0.0% | 42 |
| Christmas & New Year (Dec 20 - Jan 3) | 89.4% | +8.0 pts | 0.0% | 47 |
| Summer peak (Jun 15 - Aug 15) | 75.2% | -6.2 pts | 1.5% | 401 |
| All other days | 81.4% | — | 0.8% | 1,526 |
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).