Originally Posted by
krayZpaving
Thanks - good to know. Especially for those tempting direct ORD-DUB "United" flights that are really Aer Lingus...
Well, then there is the IAD-MAD Aer Lingus-operated flight that is an exception, at least for MP. Aer Lingus operates this flight for UA, but is considered like any other UA-operated flight for just about everything.