At the moment, the UK’s right to fly, not just to the rest of the European Union but to 44 other countries it has deals with, is governed by EU law. Could planes be left grounded if the country leaves the EU without a deal?
Countries have sovereignty over their own airspace, so international air travel relies on a series of agreements under which one state gives another consent to enter and land planes in its territory.
If the UK left without a deal, that would end. UK carriers’ EU operating licences would become invalid and the legal basis for air travel between the UK and other member states would disappear.
But it’s not in anyone’s interest to allow air travel to cease altogether.