There's a United flight on the MAN arrivals board today, 15 minutes after a differently numbered MON flight:
ZB533 1245 Palma
UA2285 1300 Palma
Interestingly (for conspiracy folks) there is also:
TOM2285 2335 Palma
Make of that what you will! The UA aircraft slated for the flight has been sitting at Palma since first thing yesterday.