ORIGIN AIRPORT REPORT
IAH
Houston, TX (IAH) departure reliability
Of 119,087 scheduled reportable flights departing IAH, 77.3% arrived on time, 14.5% arrived at least 30 minutes late, and 1.1% 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
77.3%arrived on time
14.5%30+ min late
1.1%cancelled
119,087scheduled flights
MOST-FLOWN DIRECTIONS
ALL ROUTES →Which route from IAH had the largest sample?
IAH to ORD was IAH's largest published route sample, with 6,080 scheduled flights and a 73.3% on-time rate during July 2025–June 2026.
IAH→ORDHouston, TX (IAH) to Chicago, IL (ORD)6,080 flights analyzedGenerally reliable73.3%on timeIAH→DFWHouston, TX (IAH) to Dallas/Fort Worth, TX (DFW)5,779 flights analyzedVariable72.8%on timeIAH→LAXHouston, TX (IAH) to Los Angeles, CA (LAX)5,260 flights analyzedLower disruption83.0%on timeIAH→ATLHouston, TX (IAH) to Atlanta, GA (ATL)4,906 flights analyzedGenerally reliable76.0%on timeIAH→DENHouston, TX (IAH) to Denver, CO (DEN)4,673 flights analyzedLower disruption80.8%on timeIAH→LGAHouston, TX (IAH) to New York, NY (LGA)4,053 flights analyzedVariable70.1%on timeIAH→EWRHouston, TX (IAH) to Newark, NJ (EWR)3,800 flights analyzedGenerally reliable72.9%on timeIAH→MIAHouston, TX (IAH) to Miami, FL (MIA)3,736 flights analyzedGenerally reliable76.7%on timeIAH→MCOHouston, TX (IAH) to Orlando, FL (MCO)3,669 flights analyzedLower disruption80.4%on timeIAH→SFOHouston, TX (IAH) to San Francisco, CA (SFO)3,600 flights analyzedGenerally reliable78.2%on timeIAH→LASHouston, TX (IAH) to Las Vegas, NV (LAS)3,457 flights analyzedLower disruption81.7%on timeIAH→DCAHouston, TX (IAH) to Washington, DC (DCA)3,202 flights analyzedGenerally reliable73.1%on timeIAH→MSYHouston, TX (IAH) to New Orleans, LA (MSY)2,962 flights analyzedLower disruption82.6%on timeIAH→PHXHouston, TX (IAH) to Phoenix, AZ (PHX)2,930 flights analyzedGenerally reliable78.0%on timeIAH→FLLHouston, TX (IAH) to Fort Lauderdale, FL (FLL)2,760 flights analyzedGenerally reliable78.8%on time
Which airline was most reliable departing IAH?
Among qualifying IAH airline departure results, Delta Air Lines had the highest on-time rate: 79.1% of 8,369 flights. JetBlue Airways was lowest at 59.8% across 542 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| United Airlines | 74,010 | 78.9% | 13.4% | 0.7% |
| SkyWest Airlines | 14,351 | 75.5% | 16.6% | 1.2% |
| Delta Air Lines | 8,369 | 79.1% | 12.1% | 1.8% |
| American Airlines | 7,752 | 74.5% | 16.6% | 2.6% |
| Spirit Airlines | 5,410 | 72.5% | 17.8% | 2.8% |
| Frontier Airlines | 4,776 | 68.8% | 20.5% | 1.7% |
| Envoy Air | 1,388 | 75.1% | 15.5% | 2.2% |
| Alaska Airlines | 1,205 | 77.8% | 12.3% | 0.8% |
| Republic Airways | 905 | 70.1% | 17.0% | 4.2% |
| JetBlue Airways | 542 | 59.8% | 28.6% | 1.8% |
| PSA Airlines | 379 | 65.7% | 21.1% | 4.2% |
Origin report, not airport-wide operations.
These figures summarize the reported scheduled passenger flights in the dataset, not every flight or every airport process.