How long can an f-15 stay aloft without refueling?

An F-15 can typically stay aloft for about 2 to 4 hours without refueling, depending on its mission profile, payload, and speed. The exact duration varies based on factors like fuel load, operational conditions, and whether it is engaged in combat or flying at cruising speeds. In practice, air-to-air refueling significantly extends its flight time, allowing for prolonged missions.