Does anybody know why the UA flight from Washington swaps its flight numbers around on some days?
On Sat, Sun and Mon, the flight operates UA100 IAD-MAN, then 101 MAN-IAD.
On Tue, Wed and Fri, the flight operates as UA101 IAD-MAN and UA100 MAN-IAD.
Seems a little odd and doesn't seem to be a reason as to why it happens?