The Learjet 55 is yet another impressive model in the Learjet fleet. The Learjet 55 is more spacious and luxurious than some of the smaller series. With a standing cabin, most find the 55 more comfortable and accommodating some of the other private jets in the industry. The interior dimensions are 5.8H x 5.9W x 16.7L (in feet). The Learjet 55 typically seats between seven and eight passengers, has a range of 2,100 statute miles, and a cruise speed of 520 miles an hour.