How to differentiate two flights with the same flight number that arrive on the same day?
I'm making each days flight unique based on flight number and the date that it arrives.&lt;


A standard used by some (most?) airlines is to refer to the flight by the Flight No and by the departure date (you've already discovered the problem with using arrival dates).

So your example flights would be LS1494/&lt;Sunday date&gt; and LS1494/&lt;Monday date&gt;.