Airports › Washington (IAD) › January 2026
Airport month · January 2026
Washington Dulles International in January 2026
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 2026, reporting carriers scheduled 4,248 domestic departures from Washington Dulles International (IAD). 79.2% left less than 15 minutes late and 78.2% reached their destination on time; 5.6% were cancelled.
Nationally that month, 75.6% of flights departed on time and 75.3% arrived on time, so IAD departures were 3.6 points above the national departure figure.
A year earlier, in January 2025, the airport had 4,008 departures with 78.9% leaving on time: a change of +0.3 points, with flights up 6%.
Flights arriving at IAD that month were on time 79.5% of the time (4,194 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 35%, late-arriving aircraft 28% and national aviation system 22%.
- On time 78.2%
- Arrived 15+ minutes late 16.0%
- Cancelled 5.6%
- Diverted 0.2%
January 2026 against a year earlier, the airport's year and the nation
| Measure | Jan 2026 | Jan 2025 | IAD, 12 months to Jul 2026 | All reported flights, Jan 2026 |
|---|---|---|---|---|
| Departed on time | 79.2% | 78.9% | 82.6% | 75.6% |
| Arrived on time | 78.2% | 75.1% | 80.1% | 75.3% |
| Cancelled | 5.6% | 3.1% | 1.4% | 4.7% |
| Average departure delay (late minutes only) | 14.5 min | 15.8 min | 14.7 min | 16.7 min |
| Scheduled departures a day | 142 | 134 | 159 | 18,133 |
| Scheduled departures | 4,248 | 4,008 | 58,031 | 544,003 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| UA United Airlines | 2,728 | 64% | 79.6% | 1.8 min | 4.8% |
| YX Republic Airline | 628 | 15% | 81.2% | -2.5 min | 6.2% |
| DL Delta Air Lines | 222 | 5% | 73.4% | 15.5 min | 7.2% |
| OO SkyWest Airlines | 188 | 4% | 61.7% | 33.5 min | 9.6% |
| F9 Frontier Airlines | 113 | 3% | 69.9% | 14.6 min | 6.2% |
| OH PSA Airlines | 98 | 2% | 76.5% | -2.8 min | 10.2% |
| WN Southwest Airlines | 92 | 2% | 83.7% | -4.5 min | 4.3% |
| AA American Airlines | 86 | 2% | 76.7% | -9.6 min | 12.8% |
| AS Alaska Airlines | 68 | 2% | 67.6% | 4.6 min | 2.9% |
| G4 Allegiant Air | 25 | 1% | 72.0% | -5.3 min | 8.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| IAD–ATL | Washington to Atlanta | 281 | 77.2% | 6.5 min | 6.0% |
| IAD–DEN | Washington to Denver | 280 | 83.6% | 1.3 min | 3.9% |
| IAD–SFO | Washington to San Francisco | 209 | 74.2% | 11.7 min | 4.8% |
| IAD–CLT | Washington to Charlotte | 197 | 76.1% | -1.3 min | 9.6% |
| IAD–MCO | Washington to Orlando | 186 | 78.5% | 1.3 min | 3.8% |
| IAD–LAX | Washington to Los Angeles | 174 | 73.0% | 4.1 min | 4.6% |
| IAD–DFW | Washington to Dallas/Fort Worth | 138 | 76.8% | -0.4 min | 10.9% |
| IAD–IAH | Washington to Houston | 129 | 86.0% | -6.1 min | 3.9% |
| IAD–ORD | Washington to Chicago | 129 | 70.5% | 6.9 min | 3.1% |
| IAD–EWR | Washington to Newark | 124 | 77.4% | 0.8 min | 6.5% |
| IAD–PIT | Washington to Pittsburgh | 113 | 84.1% | -0.8 min | 5.3% |
| IAD–SAN | Washington to San Diego | 112 | 79.5% | -4.7 min | 3.6% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left IAD on time in January 2026?
79.2% of 4,248 scheduled domestic departures left less than 15 minutes late, and 78.2% reached their destination on time. The national figures that month were 75.6% and 75.3%.
How does that compare with a year earlier?
In January 2025, 78.9% of 4,008 departures left on time and 3.1% were cancelled, against 79.2% and 5.6% in January 2026.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for January 2026; 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.