Having spoken with a pal of mine who works in UA’s Commerical department, the reason UA pulled much of the B757 operation is because of the new agreements that they made with pilots and cabin crew earlier this year. The B757 operation isn’t as lucrative now which is why the ORD-SNN-SNN operation isn’t returning. They’re mostly gonna be used on Hawaiian routes ex SFO and LAX now as Hawaii is the big sunshine holiday destination for US citizens these days. SNN wasn’t the only European airport to experience reduction either.