Out of curiosity, what flight, currently still operating, has the earliest inception?
There are several ways to define this, and I expect available information will determine what definition is most useful. As an example, if a flight's inception date is the earliest date such that there has been a commercial flight on every day (or every week) between that date and today, what flight has the earliest inception date?
Also interested in a flight using the same aerodromes, or with the same airline, or even aircraft type.