MARKETING CARRIER REPORT
UA
United Airlines historical flight reliability
Across 821,041 scheduled domestic flights marketed by United Airlines, 77.9% arrived on time, 13.6% arrived at least 30 minutes late, and 1.0% were cancelled during July 2025–June 2026.
Source: U.S. Bureau of Transportation Statistics · National marketing-carrier cohort · Updated September 16, 2026
HISTORICAL ROUTE SIGNALGenerally reliable
77.9%arrived on time
13.6%30+ min late
1.0%cancelled
821,041scheduled flights
LARGEST QUALIFYING SAMPLES
SEARCH ROUTES →Which United Airlines published route was most reliable?
Among qualifying United Airlines published route results, SFO to IAH had the highest on-time rate: 84.3% of 3,600 flights. LGA to ORD was lowest at 64.0% across 4,662 flights.
ORD→LGAChicago, IL (ORD) to New York, NY (LGA)4,662 flights analyzedVariable64.8%on timeLGA→ORDNew York, NY (LGA) to Chicago, IL (ORD)4,662 flights analyzedVariable64.0%on timeORD→EWRChicago, IL (ORD) to Newark, NJ (EWR)4,391 flights analyzedVariable69.5%on timeEWR→ORDNewark, NJ (EWR) to Chicago, IL (ORD)4,389 flights analyzedVariable69.4%on timeMCO→EWROrlando, FL (MCO) to Newark, NJ (EWR)4,014 flights analyzedGenerally reliable76.3%on timeEWR→MCONewark, NJ (EWR) to Orlando, FL (MCO)4,014 flights analyzedGenerally reliable77.6%on timeIAH→ORDHouston, TX (IAH) to Chicago, IL (ORD)4,007 flights analyzedGenerally reliable77.3%on timeORD→IAHChicago, IL (ORD) to Houston, TX (IAH)4,000 flights analyzedGenerally reliable78.0%on timeIAH→DENHouston, TX (IAH) to Denver, CO (DEN)3,875 flights analyzedLower disruption81.1%on timeDEN→IAHDenver, CO (DEN) to Houston, TX (IAH)3,875 flights analyzedGenerally reliable77.7%on timeSFO→ORDSan Francisco, CA (SFO) to Chicago, IL (ORD)3,815 flights analyzedGenerally reliable77.1%on timeORD→SFOChicago, IL (ORD) to San Francisco, CA (SFO)3,813 flights analyzedVariable69.0%on timeEWR→SFONewark, NJ (EWR) to San Francisco, CA (SFO)3,793 flights analyzedVariable67.0%on timeSFO→EWRSan Francisco, CA (SFO) to Newark, NJ (EWR)3,790 flights analyzedGenerally reliable72.8%on timeORD→DENChicago, IL (ORD) to Denver, CO (DEN)3,758 flights analyzedGenerally reliable76.5%on timeDEN→ORDDenver, CO (DEN) to Chicago, IL (ORD)3,756 flights analyzedGenerally reliable70.6%on timeIAH→SFOHouston, TX (IAH) to San Francisco, CA (SFO)3,600 flights analyzedGenerally reliable78.2%on timeSFO→IAHSan Francisco, CA (SFO) to Houston, TX (IAH)3,600 flights analyzedLower disruption84.3%on time
Network averages hide route mix.
An airline's national result reflects where and when it flies. A route-specific comparison is usually more useful for a booking decision.