For those flying to their vacation destination, here are a few things to keep in mind:

• A domestic flight reward typically costs between 25,000-40,000 frequent flier miles.
  
• A first class domestic upgrade normally uses only 15,000 frequent flier miles.
  
• The best time to take advantage of a first class upgrade is during off peak hours.
  
• 55 percent of travelers travel by air to get to their destination.
  
• To stay hydrated, drink 8 ounces of water for every hour in flight.
  
• Many airlines no longer offer meal service, especially on shorter flights.