Airports › Washington (IAD) › January 2025
Airport month · January 2025
Washington Dulles International in January 2025
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 January 2025, reporting carriers scheduled 4,008 domestic departures from Washington Dulles International (IAD). 78.9% left less than 15 minutes late and 75.1% reached their destination on time; 3.1% were cancelled.
Nationally that month, 79.3% of flights departed on time and 78.6% arrived on time, so IAD departures were level with the national departure figure.
A year earlier, in January 2024, the airport had 3,988 departures with 75.9% leaving on time: a change of +3.0 points, with flights up 1%.
Flights arriving at IAD that month were on time 78.8% of the time (4,008 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 39%, late-arriving aircraft 26% and national aviation system 25%.
- On time 75.1%
- Arrived 15+ minutes late 21.5%
- Cancelled 3.1%
- Diverted 0.2%
January 2025 against a year earlier, the airport's year and the nation
| Measure | Jan 2025 | Jan 2024 | IAD, 12 months to Jul 2026 | All reported flights, Jan 2025 |
|---|---|---|---|---|
| Departed on time | 78.9% | 75.9% | 82.6% | 79.3% |
| Arrived on time | 75.1% | 72.2% | 80.1% | 78.6% |
| Cancelled | 3.1% | 7.1% | 1.4% | 3.0% |
| Average departure delay (late minutes only) | 15.8 min | 14.9 min | 14.7 min | 14.0 min |
| Scheduled departures a day | 134 | 133 | 159 | 17,992 |
| Scheduled departures | 4,008 | 3,988 | 58,031 | 539,747 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| UA United Airlines | 2,595 | 65% | 76.5% | 8.7 min | 2.0% |
| YX Republic Airline | 548 | 14% | 75.2% | 5.7 min | 7.3% |
| DL Delta Air Lines | 213 | 5% | 72.3% | 9.4 min | 3.3% |
| OO SkyWest Airlines | 212 | 5% | 70.8% | 19.0 min | 6.1% |
| OH PSA Airlines | 117 | 3% | 74.4% | 9.7 min | 6.0% |
| WN Southwest Airlines | 93 | 2% | 81.7% | -2.9 min | 0.0% |
| AS Alaska Airlines | 77 | 2% | 70.1% | 7.4 min | 0.0% |
| F9 Frontier Airlines | 71 | 2% | 54.9% | 26.7 min | 4.2% |
| AA American Airlines | 62 | 2% | 67.7% | 32.6 min | 4.8% |
| G4 Allegiant Air | 20 | 0% | 70.0% | 68.2 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| IAD–ATL | Washington to Atlanta | 272 | 67.6% | 17.9 min | 5.1% |
| IAD–DEN | Washington to Denver | 254 | 79.5% | 6.3 min | 0.4% |
| IAD–MCO | Washington to Orlando | 192 | 74.0% | 9.3 min | 1.0% |
| IAD–SFO | Washington to San Francisco | 192 | 84.4% | -1.1 min | 1.0% |
| IAD–LAX | Washington to Los Angeles | 160 | 74.4% | 19.9 min | 1.3% |
| IAD–CLT | Washington to Charlotte | 148 | 75.7% | 8.7 min | 5.4% |
| IAD–IAH | Washington to Houston | 130 | 70.0% | 20.0 min | 4.6% |
| IAD–DFW | Washington to Dallas/Fort Worth | 129 | 72.1% | 18.6 min | 3.9% |
| IAD–BOS | Washington to Boston | 124 | 86.3% | -1.5 min | 3.2% |
| IAD–ORD | Washington to Chicago | 124 | 75.8% | 8.2 min | 1.6% |
| IAD–SAN | Washington to San Diego | 124 | 77.4% | 1.8 min | 0.8% |
| IAD–EWR | Washington to Newark | 115 | 72.2% | 12.1 min | 1.7% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left IAD on time in January 2025?
78.9% of 4,008 scheduled domestic departures left less than 15 minutes late, and 75.1% reached their destination on time. The national figures that month were 79.3% and 78.6%.
How does that compare with a year earlier?
In January 2024, 75.9% of 3,988 departures left on time and 7.1% were cancelled, against 78.9% and 3.1% in January 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for January 2025; 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.