Route
IAD → PHL
Washington Dulles International Airport Philadelphia International Airport
135 miles
Return route PHL → IAD →
How punctual is this route?
- On-time arrivals
- 80.9%
- Less than 15 minutes late
- Cancelled
- 4.3%
- Of scheduled flights
- Average delay when late
- 72 min
- Flights arriving 15+ minutes late
- Flights tracked
- 230
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 41%
- Late-arriving aircraft 34%
- Airline (crew, maintenance, cleaning) 13%
- Extreme weather 13%
- 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 | 0.0% | 1 |
| October 2025 | 88.2% | 17 |
| November 2025 | 86.7% | 50 |
| December 2025 | 78.6% | 28 |
| January 2026 | 71.4% | 7 |
| February 2026 | 0.0% | 2 |
| May 2026 | 86.7% | 15 |
| June 2026 | 90.9% | 35 |
| July 2026 | 76.4% | 57 |
| August 2026 | 70.6% | 18 |
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 |
|---|---|---|---|---|
| Republic Airways | 230 | 80.9% | 4.3% | 72 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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