MARKETING CARRIER REPORT
DL
Delta Air Lines historical flight reliability
Across 1,038,570 scheduled domestic flights marketed by Delta Air Lines, 80.1% arrived on time, 11.8% arrived at least 30 minutes late, and 1.6% 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
80.1%arrived on time
11.8%30+ min late
1.6%cancelled
1,038,570scheduled flights
LARGEST QUALIFYING SAMPLES
SEARCH ROUTES →Which Delta Air Lines published route was most reliable?
Among qualifying Delta Air Lines published route results, RDU to ATL had the highest on-time rate: 88.2% of 3,800 flights. ATL to DCA was lowest at 65.3% across 3,838 flights.
ATL→MCOAtlanta, GA (ATL) to Orlando, FL (MCO)5,465 flights analyzedVariable69.6%on timeMCO→ATLOrlando, FL (MCO) to Atlanta, GA (ATL)5,463 flights analyzedGenerally reliable78.1%on timeATL→LGAAtlanta, GA (ATL) to New York, NY (LGA)4,936 flights analyzedVariable73.9%on timeLGA→ATLNew York, NY (LGA) to Atlanta, GA (ATL)4,933 flights analyzedVariable77.4%on timeTPA→ATLTampa, FL (TPA) to Atlanta, GA (ATL)4,413 flights analyzedLower disruption80.5%on timeATL→TPAAtlanta, GA (ATL) to Tampa, FL (TPA)4,413 flights analyzedGenerally reliable73.6%on timeATL→FLLAtlanta, GA (ATL) to Fort Lauderdale, FL (FLL)4,272 flights analyzedGenerally reliable72.2%on timeFLL→ATLFort Lauderdale, FL (FLL) to Atlanta, GA (ATL)4,268 flights analyzedGenerally reliable77.5%on timeATL→LAXAtlanta, GA (ATL) to Los Angeles, CA (LAX)3,849 flights analyzedGenerally reliable78.9%on timeLAX→ATLLos Angeles, CA (LAX) to Atlanta, GA (ATL)3,844 flights analyzedLower disruption80.6%on timeATL→DCAAtlanta, GA (ATL) to Washington, DC (DCA)3,838 flights analyzedVariable65.3%on timeDCA→ATLWashington, DC (DCA) to Atlanta, GA (ATL)3,838 flights analyzedVariable78.4%on timeJAX→ATLJacksonville, FL (JAX) to Atlanta, GA (ATL)3,830 flights analyzedGenerally reliable85.0%on timeATL→JAXAtlanta, GA (ATL) to Jacksonville, FL (JAX)3,829 flights analyzedGenerally reliable75.2%on timeRDU→ATLRaleigh/Durham, NC (RDU) to Atlanta, GA (ATL)3,800 flights analyzedLower disruption88.2%on timeATL→RDUAtlanta, GA (ATL) to Raleigh/Durham, NC (RDU)3,799 flights analyzedLower disruption82.1%on timeATL→PBIAtlanta, GA (ATL) to West Palm Beach/Palm Beach, FL (PBI)3,737 flights analyzedGenerally reliable75.1%on timePBI→ATLWest Palm Beach/Palm Beach, FL (PBI) to Atlanta, GA (ATL)3,737 flights analyzedGenerally reliable82.6%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.