Would it be cheaper to fly or drive on this trip?

Omaha, NE, to Middletown, NY. Plane tickets are $338 each on Continental to Wilkes-Barre/Scranton and there would be 4 people. We would drive in a minivan with about 25 mpg highway plus overnight lodgings and food. The gas tank holds 26 gallons or so. With gas prices really high and still rising,would it be more economical to drive or fly?