At what distance from the airport can a flight cancel IFR clearance?

A flight can cancel IFR (Instrument Flight Rules) clearance when it is at least 10 miles from the airport. This distance ensures that the flight is sufficiently clear of traffic and is likely in a safe position to transition to Visual Flight Rules (VFR) if conditions allow. The 10-mile radius serves as a standard measure to help maintain safety regulations and separation from other aircraft and airspace complexities that are prevalent closer to the airport.

This standard is established in part due to the need for pilots to have sufficient space to assess flight conditions and navigate visually, ensuring they can make informed decisions regarding their flight paths. The choice of 10 miles reflects a balance between maintaining control and allowing for pilot discretion when flying under visual conditions.