Complex sentence: They would get to their hotel room about 0100 and have to be awake at 0530 (30 minutes to get ready) for the 0600 shuttle to the airport, leaving the crew about 4 hours and 30 minutes of "rest".
Split into simpler sentences: They would get to their hotel room about 0100 and have to be awake at 0530 (30 minutes to get ready) for the 0600 shuttle to the airport. Leaving the crew about 4 hours and 30 minutes of "rest".