About OnTimeCheck
OnTimeCheck is a lookup tool showing historical on-time performance, delay causes, and cancellation rates by airline and specific route, sourced from the Bureau of Transportation Statistics' official Airline On-Time Performance data.
Disclaimer: Historical performance does not guarantee future results for any individual flight. Data has an approximate 3-month reporting lag and covers major carriers only. Always check real-time flight status directly with your airline before travel.
How We Work
We download and parse monthly BTS data files, aggregating statistics by airline and route. Our search queries these pre-aggregated tables for fast performance.