The cost of fueling for U.S. airlines soared to more than $6.6 billion in May, nearly double what it was a year ago due to ongoing tensions in the Middle East. It’s another sign of

The cost of fueling for U.S. airlines soared to more than $6.6 billion in May, nearly double what it was a year ago due to ongoing tensions in the Middle East. It’s another sign of the pain at the pump for consumers — this time, with airplanes.