How long does it take to cover 708 miles by airplane?

Well it would depend on the aircraft type. Most light aircraft, will cruise at about 100-110 miles per hour, but often only carry enough fuel to fly about 300 miles. So the distance could be covered in about 61/2 hours, but need at least one fuel stop, so say 7 hours all together. The average airliner like an Airbus, will make about 525 mph, so about an hour and a half in one of those.