What is the primary purpose of an IFR flight plan?

The primary purpose of an IFR flight plan is to provide necessary information to control aircraft operating under Instrument Flight Rules. When pilots file an IFR flight plan, they submit crucial data about their route, aircraft type, and any expected altitudes, which helps air traffic control manage and ensure the safe and efficient flow of air traffic. This is especially important in busy airspaces and when flying in conditions where visual references are limited, requiring reliance on instruments for navigation and control.

Filing an IFR flight plan also allows pilots to receive critical services such as traffic advisories and weather updates while en route. This structured communication between pilots and air traffic control enhances safety and operational efficiency as aircraft navigate through controlled airspace and potentially challenging weather conditions.