Andrew tells Blake that he caught the "red eye" from New York to Denver. Red eye flights are overnight flights. Not possible going from East to West. Red eye flights fly from the west coast to the east coast, typically leaving the west coast around midnight and arriving in the early morning hours on the east coast.
At the conclusion of his chess game with Steven, Dr. Ling announces that he has checkmated him. However, none of his pieces are covering the d8 square, and Steven's king would be able to escape there.