Route
BNA → IAD
Nashville International Airport Washington Dulles International Airport
542 miles
Return route IAD → BNA →
How punctual is this route?
- On-time arrivals
- 77.5%
- Less than 15 minutes late
- Cancelled
- 1.2%
- Of scheduled flights
- Average delay when late
- 97 min
- Flights arriving 15+ minutes late
- Flights tracked
- 997
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 43%
- Airline (crew, maintenance, cleaning) 37%
- Air traffic control & airport 11%
- Extreme weather 8%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 82.3% | 79 |
| October 2025 | 78.5% | 93 |
| November 2025 | 71.6% | 88 |
| December 2025 | 78.6% | 70 |
| January 2026 | 85.2% | 58 |
| February 2026 | 86.2% | 68 |
| March 2026 | 67.4% | 87 |
| April 2026 | 84.1% | 89 |
| May 2026 | 77.6% | 86 |
| June 2026 | 75.0% | 92 |
| July 2026 | 75.8% | 98 |
| August 2026 | 73.9% | 89 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| United Airlines | 927 | 77.2% | 1.2% | 97 min |
| Republic Airways | 37 | 83.8% | 0.0% | 82 min |
| Allegiant Air | 32 | 77.4% | 3.1% | 119 min |
| Southwest Airlines | 1 | 100.0% | 0.0% | — |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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