To be fair, this problem is semi-solved by European airlines by having callsigns like BAW44W.
Which uses the last 2 numbers of the flight number, and an alphabetical character. BA use this on a lot of transatlantic type flights where delays etc can be an issue.
Which uses the last 2 numbers of the flight number, and an alphabetical character. BA use this on a lot of transatlantic type flights where delays etc can be an issue.