US Airline On-Time Performance and Delay Causes, 1987-2026 (BTS, aggregated)

Analysis-ready aggregates of the U.S. Bureau of Transportation Statistics on-time performance data, 1987 through mid-2026: per-airline and per-airport yearly on-time share, average delay, cancellations, diversions and the five BTS delay-cause shares, plus each airline's ten worst routes over the trailing 12 months. Compiled by FlightFinder; interactive explorer at himaxym.com/delays. Also on Kaggle: kaggle.com/datasets/himaxym/us-airline-otp-bts. Source: BTS (U.S. government work, public domain). Compilation: CC BY 4.0.