Willis Lease Finance Corp. engages in the provision of aviation services and operating leases of commercial aircraft, aircraft engines, and other aircraft-related equipment to air carriers, manufacturers, and overhaul/repair facilities. It operates through the Leasing and Related Operations, and Spare Parts Sales. The Leasing and Related Operations segment acquires and leases commercial aircraft and aircraft engines, and the selective purchase and resale of commercial aircraft engines and other aircraft equipment and other related businesses. The Spare Parts Sales segment includes the purchase and resale of after-market engine parts, whole engines, engine modules, and portable aircraft components. The company was founded by Charles F. Willis, IV in 1985 and is headquartered in Coconut Creek, FL.