The phrase "allowed to fly at" is correct and usable in written English.
It can be used in contexts related to aviation regulations, permissions, or restrictions regarding altitude or airspace.
Example: "The aircraft is allowed to fly at an altitude of 10,000 feet."
Alternatives: "permitted to fly at" or "authorized to fly at".
Under his agency's proposed airspace redesign, planes might be allowed to fly at higher altitudes before landing and after takeoff.
The Welsh dragon will also be allowed to fly at Cardiff's Millennium Stadium.
The airship is not allowed to fly at night during the test stage.
The RAF squadrons were naturally on the move all the time, so the ferrypilots had to fly aircraft wherever they were based, they had no radio, and they were not allowed to fly at night.
Federal aviation regulations state that no civilian jets are allowed to fly at supersonic speeds over residential areas in the United States, and military jets are under similar restrictions when flying below 10,000 feet, according to a Department of Defense flight manual obtained by The Huffington Post.
The goat farm lies in an area in which helicopters are allowed to fly at low altitude.
At first, he was allowed to fly free at night, but he kept setting off an alarm system in the building and was eventually confined.
Presidents or chief executives are allowed to fly first class at 39percentt of companies that normally decree coach-class seating, according to a survey compiled this month by the Bureau of National Affairs, a Washington research firm.
Officials above the rank of minister are allowed to fly the flag at their residence provided they do not live near the capital.
Pilots will only be allowed to fly up to 11 hours at night, while at present in many countries night-time flying of 11 hours and 45 minutes is permitted.
Several flies were released into the arena at a time and allowed to fly about freely.
