The JFK service on DL normally has to wait in line for 1 to 2 hours due to congestion, hence it is always difficult to be on time. Saturday morning arrival from JFK was cancelled due to engine surges on climb out. Luckily it was fairly empty, so not much fuel burn, and landed nicely although you could feel the struts taking a heavy load.
All the US routes into MAN always change aircraft at the transatlantic arrival/departure point. For instance Sunday mornings DL 757 started in Boston, then became the MAN flight. The US 330 from PHL used to come in from San Juan, or somewhere, although I believe this has changed.