Airports › Washington (IAD) › August 2024
Airport month · August 2024
Washington Dulles International in August 2024
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In August 2024, reporting carriers scheduled 4,584 domestic departures from Washington Dulles International (IAD). 75.6% left less than 15 minutes late and 73.8% reached their destination on time; 2.9% were cancelled.
Nationally that month, 75.4% of flights departed on time and 74.7% arrived on time, so IAD departures were level with the national departure figure.
A year earlier, in August 2023, the airport had 4,853 departures with 80.3% leaving on time: a change of −4.7 points, with flights down 6%.
Flights arriving at IAD that month were on time 76.6% of the time (4,574 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 36%, air carrier 30% and extreme weather 17%.
- On time 73.8%
- Arrived 15+ minutes late 23.1%
- Cancelled 2.9%
- Diverted 0.2%
August 2024 against a year earlier, the airport's year and the nation
| Measure | Aug 2024 | Aug 2023 | IAD, 12 months to Jul 2026 | All reported flights, Aug 2024 |
|---|---|---|---|---|
| Departed on time | 75.6% | 80.3% | 82.6% | 75.4% |
| Arrived on time | 73.8% | 79.3% | 80.1% | 74.7% |
| Cancelled | 2.9% | 1.1% | 1.4% | 2.1% |
| Average departure delay (late minutes only) | 24.8 min | 15.7 min | 14.7 min | 18.4 min |
| Scheduled departures a day | 153 | 162 | 159 | 20,634 |
| Scheduled departures | 4,584 | 4,853 | 58,031 | 619,025 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| UA United Airlines | 2,718 | 59% | 74.0% | 16.9 min | 2.2% |
| YX Republic Airline | 729 | 16% | 71.7% | 10.4 min | 6.6% |
| OO SkyWest Airlines | 289 | 6% | 64.7% | 26.4 min | 4.2% |
| DL Delta Air Lines | 281 | 6% | 82.6% | 6.6 min | 0.4% |
| AS Alaska Airlines | 224 | 5% | 77.2% | 9.9 min | 1.3% |
| OH PSA Airlines | 148 | 3% | 78.4% | 18.0 min | 3.4% |
| WN Southwest Airlines | 110 | 2% | 79.1% | 8.2 min | 0.9% |
| AA American Airlines | 60 | 1% | 76.7% | 24.6 min | 1.7% |
| G4 Allegiant Air | 25 | 1% | 40.0% | 46.4 min | 4.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| IAD–ATL | Washington to Atlanta | 306 | 80.7% | 6.0 min | 1.0% |
| IAD–DEN | Washington to Denver | 296 | 75.7% | 16.5 min | 0.7% |
| IAD–SEA | Washington to Seattle | 265 | 78.5% | 14.7 min | 0.8% |
| IAD–SFO | Washington to San Francisco | 249 | 73.5% | 13.4 min | 2.0% |
| IAD–LAX | Washington to Los Angeles | 236 | 80.9% | 6.5 min | 1.3% |
| IAD–CLT | Washington to Charlotte | 179 | 78.2% | 14.6 min | 3.9% |
| IAD–ORD | Washington to Chicago | 156 | 66.0% | 25.4 min | 1.3% |
| IAD–IAH | Washington to Houston | 155 | 80.6% | 6.6 min | 1.9% |
| IAD–DFW | Washington to Dallas/Fort Worth | 145 | 77.9% | 17.2 min | 1.4% |
| IAD–BOS | Washington to Boston | 124 | 64.5% | 26.9 min | 1.6% |
| IAD–IND | Washington to Indianapolis | 124 | 73.4% | 11.7 min | 4.8% |
| IAD–LGA | Washington to New York | 124 | 58.9% | 20.1 min | 11.3% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left IAD on time in August 2024?
75.6% of 4,584 scheduled domestic departures left less than 15 minutes late, and 73.8% reached their destination on time. The national figures that month were 75.4% and 74.7%.
How does that compare with a year earlier?
In August 2023, 80.3% of 4,853 departures left on time and 1.1% were cancelled, against 75.6% and 2.9% in August 2024.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 2024; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for IAD · methodology · corrections.