Try to arrive two hours ahead of your scheduled time of departure for international flights because you just might find yourself bumped from a flight or miss your flight because of long lines at the airport. Secondly, take a large bottle of water to drink throughout your flight. Rule of thumb is for every hour in the air a passenger should consume one 8 ounce glass of water. It will help with jet lag and it helps you adjust to any increases in elevation at your destination.