How Airport Slots and PPR Rules Affect Private and Charter Flights

An explainer published 2026-11-08 sets out how airport slots and prior permission required (PPR) rules determine whether, when and how a private or charter flight can use a busy airport. An airport slot is permission to use runway and terminal capacity to land or take off on a set date and time.

IATA's Worldwide Airport Slot Guidelines sort airports into three levels. Level 1 airports are non-coordinated, where capacity generally meets demand. Level 2 airports have schedules facilitated, where congestion is possible at some times and schedule changes are agreed with airlines. At Level 3 airports, which are coordinated, demand far exceeds capacity and every operator needs a slot from an independent coordinator. IATA reports more than 200 Level 3 airports and more than 160 Level 2 airports worldwide.

In the European Union, Council Regulation (EEC) No 95/93 sets the common slot-allocation rules, with coordinated and schedules-facilitated airports. At a coordinated airport an operator needs a slot from the coordinator to land or take off, and the rules apply to business aviation as well as airlines. In the United States, the FAA treats three airports as slot controlled: New York LaGuardia, New York JFK and Washington Reagan National. Unscheduled flights, including private and charter flights, need a reservation where the FAA requires one, made through the FAA's online e-CVRS system.

An airport marked PPR requires permission from the airport operator before arrival. The PPR note appears in official airport information such as a country's Aeronautical Information Publication or, in the US, the FAA Chart Supplement. PPR rules vary by airport and are sometimes used for noise or security reasons, and one airport can require both a slot and a PPR for the same flight. Both are separate from overflight and landing permits, which are issued by national aviation authorities, concern the country rather than the airport, and may be needed in addition when crossing borders.

The guide tells travellers to request slots as early as possible for fixed dates, especially at busy airports and during events and holidays. It says business-jet parking must be confirmed separately, since a slot does not guarantee parking.

It points to the charter operator, FBO or trip support company as the party that usually requests slots and PPR, and advises obtaining written confirmation of each slot and PPR. If the schedule changes, the provider should be told promptly, because a slot may need to be changed or returned. The guide also recommends lining up a nearby backup airport and a capable ground handler.

The three-level structure shows how access to congested airports works: it is allocated capacity, not an open market. At Level 3 airports demand far exceeds capacity, so a business-aviation movement competes for the same rationed runway and terminal time as airline schedules, and EU rules apply to it explicitly. That makes lead time part of the product a charter operator or trip support company sells, not an administrative afterthought.

The separation of slot, PPR, parking and overflight or landing permits also explains why a single trip can carry several independent approvals. A flight can hold a slot and still lack parking, or hold both and still need a PPR, with country-level permits layered on top for border crossings. Coordination across those layers sits with the operator, FBO or trip support company, which is why ground-handling capability and a pre-arranged alternate airport recur in the guide's advice.

The guide's own caveat is that PPR rules differ airport by airport, so the airport's official publication, not a general summary, is the reference that settles any given flight.