What is the minimum required visibility for an IFR flight?

For an IFR (Instrument Flight Rules) flight, the minimum required visibility is typically 3 statute miles. This requirement is established to ensure that pilots maintain a sufficient visual reference during flight operations, even when flying primarily by instruments. The visibility rule is crucial for safety, especially during takeoff and landing phases, where pilots need to navigate in potentially low visibility conditions while relying on their instruments.

Different regulations can exist depending on airspace classification and specific flight conditions, but the general rule for IFR operations in controlled airspace is set at this visibility threshold. This helps mitigate the risk of accidents by ensuring pilots have an adequate ability to see and avoid obstacles or other aircraft when necessary. Additionally, visibility can be affected by various factors such as weather conditions and the presence of obstructions, which is why having a clear minimum is vital for safe navigation under IFR.