Route
IAD → CHS
Washington Dulles International Airport Charleston International Airport
442 miles
Return route CHS → IAD →
How punctual is this route?
- On-time arrivals
- 86.6%
- Less than 15 minutes late
- Cancelled
- 1.2%
- Of scheduled flights
- Average delay when late
- 83 min
- Flights arriving 15+ minutes late
- Flights tracked
- 764
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 52%
- Airline (crew, maintenance, cleaning) 30%
- Air traffic control & airport 16%
- Extreme weather 2%
- 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 | 94.0% | 50 |
| October 2025 | 92.2% | 51 |
| November 2025 | 90.2% | 61 |
| December 2025 | 75.0% | 57 |
| January 2026 | 78.8% | 57 |
| February 2026 | 90.6% | 53 |
| March 2026 | 83.5% | 92 |
| April 2026 | 88.5% | 78 |
| May 2026 | 86.4% | 81 |
| June 2026 | 93.2% | 60 |
| July 2026 | 83.6% | 62 |
| August 2026 | 85.2% | 62 |
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 | 490 | 88.1% | 0.8% | 90 min |
| Republic Airways | 274 | 84.0% | 1.8% | 74 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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