How accurate is it?
Every leg is matched on date, flight number and city pair against FlightAware’s records. When two aircraft flew that number that day we show both and mark the leg ambiguous rather than guess.
What if a flight is not found?
It stays in your record marked "not found" with the reason. We still ran the lookup, so those legs count toward your total. The results page tells you exactly how many.
Where does the data come from?
FlightAware AeroAPI history, which covers airline and most Part 135 operations back to 2011. Purely private flying without a flight number cannot be looked up.
Is my logbook stored?
Your parsed legs and results are kept so the link we email you keeps working. We never share them. Delete on request.