Nashville (BNA) to Washington (IAD): On-Time Performance
Data through July 2026
When you fly BNA to IAD matters as much as anything else about the booking: the route swung from 91% on-time in September 2024 to just 65% in July 2025. Across the full period the route averages 80% on-time against a national 78%. Morning departures also hold up better than evening ones (89% vs 72%), which matters most in the rough months.
- On-time
- 80%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 0.9%
- Flights/day
- 2.8
- last 12 months
- Duration
- 1h 47m
- scheduled
- Distance
- 542 mi
Best airline from BNA to IAD
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Allegiant Airmost reliable | 83% | 17 min | 1.2% | 81 |
| United Airlines | 80% | 17 min | 1.0% | 1,983 |
Monthly on-time trend
Best time to fly from BNA to IAD
Aim for departures around 12 p.m. (92% on-time); avoid 6 p.m. departures (72%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 78% | 21 min |
| Tuesdaybest | 85% | 15 min |
| Wednesday | 84% | 16 min |
| Thursday | 81% | 13 min |
| Friday | 79% | 22 min |
| Saturday | 83% | 16 min |
| Sunday | 74% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft42%
- Airline operations36%
- National airspace system15%
- Weather7%
Frequently asked questions
- How often are flights from BNA to IAD delayed?
- 20% of BNA–IAD flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 17 minutes.
- Which airline is most reliable from BNA to IAD?
- Allegiant Air has the best on-time record on this route at 83%, based on 81 flights. 2 airlines flew BNA–IAD frequently enough to compare in this period.
- What is the best time of day to fly from BNA to IAD?
- Departures around 12 p.m. have the best record (92% on-time), while departures around 6 p.m. have the worst (72%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BNA to IAD?
- The scheduled BNA–IAD flight time averages 1h 47m over 542 miles. Actual arrival times vary — flights on this route land 15+ minutes late 20% of the time.
- How often are BNA to IAD flights cancelled?
- 0.9% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from BNA to IAD?
- July 2025 was the roughest month in this dataset, with only 65% of arrivals on time. The best was September 2024 at 91%. If your dates are flexible, that 26-point gap is worth planning around.
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Based on 2,106 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.