Route
RDU → IAD
Raleigh-Durham International Airport Washington Dulles International Airport
How punctual is this route?
- On-time arrivals
- 86.8%
- Less than 15 minutes late
- Cancelled
- 1.3%
- Of scheduled flights
- Average delay when late
- 80 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,275
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 55%
- Airline (crew, maintenance, cleaning) 21%
- Air traffic control & airport 21%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 92.8% | 139 |
| October 2025 | 88.2% | 119 |
| November 2025 | 83.8% | 118 |
| December 2025 | 78.3% | 120 |
| January 2026 | 84.1% | 93 |
| February 2026 | 92.2% | 92 |
| March 2026 | 81.6% | 115 |
| April 2026 | 92.9% | 113 |
| May 2026 | 90.2% | 112 |
| June 2026 | 83.5% | 86 |
| July 2026 | 82.7% | 86 |
| August 2026 | 90.1% | 82 |
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 | 1,078 | 87.9% | 1.2% | 79 min |
| Republic Airways | 197 | 80.8% | 2.0% | 85 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA2463
24% late · 210 flights
-
UA1789
4% late · 198 flights
-
UA2163
8% late · 182 flights
-
UA1535
10% late · 180 flights
-
UA1257
15% late · 88 flights
-
UA1502
14% late · 78 flights
-
YX3520
30% late · 71 flights
-
UA2642
17% late · 66 flights
-
YX3462
11% late · 45 flights
-
UA689
8% late · 24 flights
-
UA517
0% late · 23 flights
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