In controlled en route airspace, the horizontal separation standard between aircraft flying at the same altitude is 5 nm (9260 m). In terminal area airspace, the minimum separation is 3 nm (5500 m).
People Also Ask
What is the distance for flying aircraft set by the regulations? Commercial aircraft flying below 29,000 feet must maintain a vertical separation of 1,000 feet. Any higher and the separation increases to 2,000 feet, except in airspace where Reduced Vertical Separation Minimum (RVSM) applies.
In aviation, the rule of three or 3:1 rule of descent is a rule of thumb that 3 nautical miles (5.6 km) of travel should be allowed for every 1,000 feet (300 m) of descent.