Airports › Washington (IAD) › January 2024
Airport month · January 2024
Washington Dulles International in January 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 January 2024, reporting carriers scheduled 3,988 domestic departures from Washington Dulles International (IAD). 75.9% left less than 15 minutes late and 72.2% reached their destination on time; 7.1% were cancelled.
Nationally that month, 74.0% of flights departed on time and 72.9% arrived on time, so IAD departures were 1.9 points above the national departure figure.
Flights arriving at IAD that month were on time 73.9% of the time (3,988 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 31%, late-arriving aircraft 31% and air carrier 30%.
- On time 72.2%
- Arrived 15+ minutes late 20.6%
- Cancelled 7.1%
- Diverted 0.1%
January 2024 against a year earlier, the airport's year and the nation
| Measure | Jan 2024 | Year earlier | IAD, 12 months to Jul 2026 | All reported flights, Jan 2024 |
|---|---|---|---|---|
| Departed on time | 75.9% | — | 82.6% | 74.0% |
| Arrived on time | 72.2% | — | 80.1% | 72.9% |
| Cancelled | 7.1% | — | 1.4% | 3.7% |
| Average departure delay (late minutes only) | 14.9 min | — | 14.7 min | 18.7 min |
| Scheduled departures a day | 133 | — | 159 | 18,242 |
| Scheduled departures | 3,988 | — | 58,031 | 547,271 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| UA United Airlines | 2,318 | 58% | 69.2% | 8.7 min | 9.7% |
| YX Republic Airline | 850 | 21% | 78.5% | 2.4 min | 2.4% |
| DL Delta Air Lines | 226 | 6% | 82.3% | 4.1 min | 0.0% |
| OO SkyWest Airlines | 153 | 4% | 73.2% | 15.3 min | 5.9% |
| OH PSA Airlines | 114 | 3% | 74.6% | 20.8 min | 1.8% |
| AS Alaska Airlines | 82 | 2% | 57.3% | -0.4 min | 28.0% |
| WN Southwest Airlines | 70 | 2% | 77.1% | 3.5 min | 0.0% |
| 9E Endeavor Air | 64 | 2% | 73.4% | 2.3 min | 1.6% |
| AA American Airlines | 62 | 2% | 69.4% | 27.2 min | 1.6% |
| MQ Envoy Air | 26 | 1% | 69.2% | 8.2 min | 3.8% |
| G4 Allegiant Air | 23 | 1% | 82.6% | 3.1 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| IAD–ATL | Washington to Atlanta | 222 | 82.4% | 3.5 min | 1.4% |
| IAD–DEN | Washington to Denver | 221 | 67.4% | 12.5 min | 11.3% |
| IAD–LGA | Washington to New York | 184 | 80.4% | -6.7 min | 5.4% |
| IAD–SFO | Washington to San Francisco | 153 | 65.4% | 1.5 min | 15.7% |
| IAD–CLT | Washington to Charlotte | 146 | 74.7% | 18.1 min | 2.7% |
| IAD–LAX | Washington to Los Angeles | 145 | 66.2% | 2.5 min | 15.9% |
| IAD–SAN | Washington to San Diego | 143 | 65.0% | -6.8 min | 21.7% |
| IAD–DFW | Washington to Dallas/Fort Worth | 142 | 66.9% | 20.4 min | 1.4% |
| IAD–MCO | Washington to Orlando | 141 | 61.7% | 12.7 min | 14.9% |
| IAD–BOS | Washington to Boston | 124 | 71.8% | 5.0 min | 12.1% |
| IAD–ORD | Washington to Chicago | 124 | 71.0% | 10.5 min | 3.2% |
| IAD–IAH | Washington to Houston | 121 | 70.2% | 3.5 min | 5.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left IAD on time in January 2024?
75.9% of 3,988 scheduled domestic departures left less than 15 minutes late, and 72.2% reached their destination on time. The national figures that month were 74.0% and 72.9%.
How does that compare with a year earlier?
January 2023 is outside the 36 months on file, or the airport had too few reported flights that month.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for January 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.