As the price of oil continues to rise, so does the price of jet fuel and the cost for a person to travel by air. Earlier this week, U.S. airlines raised its prices by twenty to sixty dollars per round trip on higher end tickets. The fare increases are likely causing more shock for leisure travelers than business fliers, who already pay steep prices for last-minute flights. Some experts say if gas prices really do get to four or five dollars per gallon the entire U.S. could be dealing with huge price hikes on everything from the airline fares to food to heating.