About the index
Operator and purpose
Compare historical disruption risk before you book; prepare for a delay after you book.
Who operates this site
UK Flight Delay Index is operated by Elanvale Ltd, UK.
Source and licence
The index is derived from CAA punctuality statistics for UK reporting airports. Raw CAA files are not republished. The derived outputs are licensed under CC BY 4.0. UK Flight Delay Index is not affiliated with or endorsed by the CAA.
How the index is calculated
Read the deterministic definitions, denominator rules, reconstruction method, and publication gates on the methodology page.
Corrections
Review published exclusions and changes in the corrections and quarantine ledger, or email corrections@flightdelayindex.com.
What this site does not do
We do not provide real-time flight status, report on or predict a particular flight, or handle passenger claims.
Quick answers
What does this record cover?
Published CAA movements, with arrivals and departures kept separate.
Does this predict my flight?
No. Historical monthly aggregates cannot establish the outcome or circumstances of an individual flight.