Do airlines need permission to fly over countries?

Flight permits are permits or permission required by an aircraft to overfly, land or make a technical stop in any country's airspace. All countries have their own regulations regarding the issuance of flight permits as there is generally a payment involved.



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Many commercial airlines fly their passengers around the world, which means that they must have permission to traverse the airspace of other countries.

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Many commercial airlines fly their passengers around the world, which means that they must have permission to traverse the airspace of other countries. International aviation law addressed this issue in the Convention on International Civil Aviation (Chicago Convention) of 1944.

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Whether you're flying from New York or New Orleans, Lisbon or London, airlines continue overbooking to compensate for “no-shows” all the time. Simply put, they sell more tickets than they have available seats. And it's not an illegal practice.

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Russia and Alaska are divided by the Bering Strait, which is about 55 miles at its narrowest point.

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Class A airspace is generally the airspace from 18,000 feet (~3.4 miles, 5.5 km) mean sea level (MSL) up to and including flight level (FL) 600 (~11.4 miles, 18.3 km), including the airspace overlying the waters within 12 nautical miles (NM) (~13.8 miles, 22.2 km) of the coast of the 48 contiguous states and Alaska.

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Planes can and do sometimes fly over Antarctica, it is not a no-fly zone and it is not illegal, it is just very impractical to do so. Smaller planes fly lower and have to deal with challenging weather conditions, snow-falls, white-outs and icing problems.

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