So you would give up flying the 777, 787, 756 strictly out of EWR because you don't want to wait 6 months in a worse case scenario? EWR is the second most junior base for UA behind SFO, The career progression to line holder, CA and WB is tremendous. Not to mention the 756 flying in EWR is the best flying at the entire airline and the 737 flying is pretty dang good too. 6 Months seems like a very short wait for all that......

I mean go to whoever hires you first and if DL has already hired you then you should go there for sure. However why not keep applying to UA so you can get the base you truly desire? UA at EWR will always be a base will your fleet at DL always have EWR only departures?