At first I used flight radar. I found this very difficult to track an individual flight because although I knew the flight code (used by the airline operators), I didn't know the callsign code (used by air traffic control). I am not even sure whether I have got this distinction correct.
In some desperation I then typed the flight number into Cortana and was delighted to discover that she had it all covered.
Switching to my Lumia 950, the details were there in a nice Cortana card too. Go Microsoft!
Next steps - Implement this feature in gorgeous ASCII for Susan.