Juices can be part of that, but keep in mind that they can also be full of calories.
If you just don't like the taste of water, try adding a wedge of lemon or lime or a little juice for additional flavor. If you're not sure how much water you drink each day, fill a 64-ounce pitcher and try to finish it by the end of the day. Your nose and mouth may feel dry, and your urine may turn very dark yellow. Airplane travel can dry you out because the cabin air has very little moisture in it. Bring your own bottled water on the plane and be sure to drink it throughout the flight.