ORIGIN AIRPORT REPORT
IAD
Washington, DC (IAD) departure reliability
Of 58,021 scheduled reportable flights departing IAD, 79.8% arrived on time, 12.1% arrived at least 30 minutes late, and 1.4% were cancelled during July 2025–June 2026.
Source: U.S. Bureau of Transportation Statistics · Origin-airport cohort · Updated September 16, 2026
HISTORICAL ROUTE SIGNALGenerally reliable
79.8%arrived on time
12.1%30+ min late
1.4%cancelled
58,021scheduled flights
MOST-FLOWN DIRECTIONS
ALL ROUTES →Which route from IAD had the largest sample?
IAD to ATL was IAD's largest published route sample, with 3,976 scheduled flights and a 77.3% on-time rate during July 2025–June 2026.
IAD→ATLWashington, DC (IAD) to Atlanta, GA (ATL)3,976 flights analyzedGenerally reliable77.3%on timeIAD→DENWashington, DC (IAD) to Denver, CO (DEN)3,560 flights analyzedLower disruption80.6%on timeIAD→SFOWashington, DC (IAD) to San Francisco, CA (SFO)2,787 flights analyzedGenerally reliable77.4%on timeIAD→LAXWashington, DC (IAD) to Los Angeles, CA (LAX)2,454 flights analyzedLower disruption80.9%on timeIAD→MCOWashington, DC (IAD) to Orlando, FL (MCO)2,176 flights analyzedLower disruption80.7%on timeIAD→ORDWashington, DC (IAD) to Chicago, IL (ORD)2,054 flights analyzedGenerally reliable74.4%on timeIAD→CLTWashington, DC (IAD) to Charlotte, NC (CLT)1,994 flights analyzedVariable81.3%on timeIAD→DFWWashington, DC (IAD) to Dallas/Fort Worth, TX (DFW)1,928 flights analyzedGenerally reliable74.7%on timeIAD→SEAWashington, DC (IAD) to Seattle, WA (SEA)1,884 flights analyzedGenerally reliable75.6%on timeIAD→IAHWashington, DC (IAD) to Houston, TX (IAH)1,869 flights analyzedLower disruption83.1%on timeIAD→EWRWashington, DC (IAD) to Newark, NJ (EWR)1,501 flights analyzedGenerally reliable73.5%on timeIAD→BOSWashington, DC (IAD) to Boston, MA (BOS)1,462 flights analyzedGenerally reliable75.8%on timeIAD→SANWashington, DC (IAD) to San Diego, CA (SAN)1,400 flights analyzedLower disruption82.7%on timeIAD→TPAWashington, DC (IAD) to Tampa, FL (TPA)1,366 flights analyzedLower disruption80.4%on timeIAD→RDUWashington, DC (IAD) to Raleigh/Durham, NC (RDU)1,293 flights analyzedLower disruption83.1%on time
Which airline was most reliable departing IAD?
Among qualifying IAD airline departure results, United Airlines had the highest on-time rate: 81.4% of 36,559 flights. Frontier Airlines was lowest at 67.9% across 1,631 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| United Airlines | 36,559 | 81.4% | 11.1% | 0.8% |
| Republic Airways | 8,917 | 79.5% | 12.1% | 2.7% |
| Delta Air Lines | 3,063 | 78.6% | 12.5% | 2.4% |
| SkyWest Airlines | 2,440 | 76.8% | 15.5% | 2.0% |
| Frontier Airlines | 1,631 | 67.9% | 21.1% | 2.5% |
| American Airlines | 1,368 | 74.6% | 14.3% | 2.7% |
| Alaska Airlines | 1,344 | 70.8% | 17.1% | 1.0% |
| Southwest Airlines | 1,100 | 72.9% | 14.5% | 1.1% |
| PSA Airlines | 1,032 | 81.2% | 10.9% | 3.4% |
| Allegiant Air | 567 | 72.8% | 18.2% | 0.4% |
Origin report, not airport-wide operations.
These figures summarize the reported scheduled passenger flights in the dataset, not every flight or every airport process.