Nathan left for the airport last night at approximately nine at night, after eating dinner with his aunt, her husband, and his cousin and his girlfriend. His flight was supposed to leave at ten fifty-five at night, but got delayed for a rather long time after a part had to be replaced on the plane he was riding on.
(However, the airport didn't have any spares of that particular part, so they had to go and take the part out of an idle plane. This is remeniscent of something Nathan tried doing once with his bike after it sprouted a flat and he needed that bike in particular because it had a rack on the back that he needed because of a prior commitment.)
Leaving LAX late did not really phase Nathan because he did not even notice. He was asleep on the plane before it left. At nine in the morning on Tuesday, Nathan arrived at Logan airport in Boston. There he rendevouzed (that may be spelled incorrectly) with his cousin and together they left.