< PrevNext > 29. Raytheon Cambridge, Mass. Share 2017 U.S.-Booked Air Volume: $117 millionConsolidated Global TMC: BCDBTN estimates that U.S.-booked air travel spend increased less than 2 percent in 2017 at defense contractor Raytheon, which continues to take steps to control travel costs. The company began a global rollout of a virtual collaboration platform that enables virtual meetings, as well as secure email and chat. Raytheon last year also worked to upgrade the reliability of its global videoconferencing services and allows the use of tools like Skype, all in an effort to minimize air travel and control costs. Raytheon's 2017 net sales increased 5 percent year over year to $25.3 billion; its backlog, a measure of firm orders for which work has yet to be performed, increased 4 percent to $38.2 billion. Operating expenses increased about 5 percent to $22 billion. The company at year-end 2017 employed 64,000 people, up from 63,000 one year prior.