The 9 Most Expensive Military Planes in the World

4. P-8A Poseidon

This $290 million aircraft is basically the warfare version of the passenger plane Boeing 747. The P-8A Poseidon is used by the US Navy, who take advantage of the many pros the aircraft has: anti-submarine warfare, anti-surface warfare, surveillance intelligence, reconnaissance, and carriage for torpedoes, missiles and depth charges.