It's no secret that the price of airline tickets is tied to the costs of running an airline. One of the biggest costs for any airline is the volatile cost of aviation fuel. Because the cost of aviation fuel is closely tied to the price of crude oil, its primary raw material, when the price of a barrel of oil goes up, the price of aviation gas goes up, and that means that your airline ticket reservations will go up. Oil prices are now on the rise, with some experts predicting that oil will top out at $78 a barrel. That means that all airline ticket reservations will get more expensive later in the year. So if you're planning to fly later this year, make those airline ticket reservations now and lock in the lowest price that you can. Even discount travel reservations including airfare may be hard to come by this year. So whether you're planning travel to Hawaii, travel to Spain or just making Las Vegas hotel reservations, don't delay. Book your flight now!