What is the Most Expensive Aircraft of the US MILITARY? It’s the B-2 Spirit stealth bomber costing at $737 million. Designed to carry nuclear arsenal deep in enemy territory, the plane is virtually undetected by radar, infrared and electromagnetic equipment. It’s more than twice as expensive as the F-22 Raptor stealth fighter, which is price at $350 million. Here’s our updated list of the 7 Most Expensive Aircraft of the US MILITARY