My flight from Pittsburgh to Miami Flight #4734 on 01/15/18 was delayed due to deicing the plane. I told the staff that I had a connecting flight with American and asked if I would miss it. She said I wouldn't -however there were 8 of us who missed the flight by 8 MINUTES and weren't allowed to board. The staff was rude! Also, we were not offered hotel accommodations because we were told it wasn't 'Americans' fault'. Why didn't the staff from flight #4734 contact the other plane record locator #GCIMJR and notify them of our arrival?? The entire American staff were rude and unhelpful. I will NEVER fly this airline again.