Airport Slots and PPR Explained for Private Flights

Airport slots and PPR decide if, when, and how your private or charter flight can use a busy airport. They can affect your schedule, parking, and even which airport you pick.

What is an airport slot?

An airport slot is permission to use runway and terminal capacity to land or take off on a set date at a set time. Busy airports use slots to match demand to the capacity they have. If an airport uses slots, you must have the right slot to arrive or depart at the time you want.

IATA's Worldwide Airport Slot Guidelines sort airports into three levels. Level 1, called non-coordinated, means capacity is generally enough for demand, so no coordination is needed. Level 2, called schedules facilitated, means congestion is possible at some times, so schedule changes are agreed with airlines. Level 3, called coordinated, means demand is much higher than capacity, and every airline and other aircraft operator needs a slot from an independent slot coordinator to arrive or depart.

IATA reports more than 200 Level 3 airports and more than 160 Level 2 airports worldwide. If you plan to use a busy airport, there is a good chance that some form of slot control applies. Your schedule can depend on what is open at the time you need.

How slots affect private and charter flights

In the European Union, Council Regulation (EEC) No 95/93 sets the common rules for slot allocation. It uses two categories, coordinated airports and schedules facilitated airports. At a coordinated airport, an operator needs a slot from the coordinator to land or take off. These rules also apply to business aviation flights, not only airlines. If you book a charter into a coordinated EU airport, your operator will need to secure a slot that matches your plan.

In the United States, the FAA treats three airports as slot controlled, New York LaGuardia, New York JFK, and Washington Reagan National. Unscheduled flights, such as private and charter flights, need a reservation at the slot controlled airports where the FAA requires one. FAA reservations for unscheduled flights are made through the FAA's online e-CVRS system, which is run by the Airport Reservation Office, not by the local control tower. Reservations open 72 hours before the flight and are given first come, first served. There is no standby list. Flights that declare an emergency do not need a reservation.

At LaGuardia, an FAA order sets aside a small number of reservations per hour for unscheduled flights. This means popular times can fill up fast. If you must arrive in a peak period, be ready to try several times or adjust your plan.

What is PPR?

PPR means prior permission required. An airport marked PPR wants you to get permission from the airport operator before you arrive. The PPR note appears in official airport information, such as a country's Aeronautical Information Publication, or in the United States, the FAA Chart Supplement. PPR rules differ from airport to airport. Some use it due to parking limits. Some use it for opening hours. Some use it for noise or security rules. A PPR is separate from a slot. One airport can ask for both a slot and a PPR for the same flight.

A slot or PPR is also separate from overflight and landing permits. Those permits are about the country, not the airport. If you are crossing borders, you may need those permits in addition to any slot or PPR the airport requires.

Slots, PPR, and permits compared

Item	Who issues it	What it covers	Where you see it	Notes
Airport slot	Independent slot coordinator or FAA reservation system	Runway and terminal capacity for a set date and time	IATA Level 2 and Level 3 airports, EU coordinated airports, FAA slot controlled airports	Needed to land or take off at many busy airports
PPR	Airport operator	Permission to arrive or park, often for parking, hours, noise, or security	AIP or FAA Chart Supplement	Separate from a slot, one airport can require both
Overflight or landing permit	National aviation authority	Right to enter a country's airspace or land	Country rules and notices	About the country, not the airport. For an overview, see our guide to overflight and landing permits.

Planning tips to avoid delays or diversions

Busy airports, big events, and holidays tend to fill first. If your dates are fixed, ask your team to request slots as early as they can. For general timing advice on private trips, see our guide to how far ahead to book.

Parking for business jets can run out even when a slot exists. A slot gives you runway and terminal access, but it does not always mean parking is open. Ask your provider to check parking before they confirm your itinerary.

Your charter operator, FBO, or trip support company usually requests slots and PPR for you. A specialist can also help you weigh tradeoffs, such as a late night slot at the main airport versus a daytime slot at a nearby field. To see what these firms handle, read our guide to what a trip support company does.

Ask for written confirmation of each slot and any PPR. Keep the reference details handy on the day of flight. If your plan changes, your slot may need to be changed or given back. The same goes for PPR. Tell your provider fast when your schedule moves.

A backup airport nearby can save a trip. Your team can line up a secondary plan in case your first slot or parking falls through. A good ground handler at each airport can help keep options open and speed up changes. For help picking a handler, use our guide to choosing a ground handler.

Checklist of questions to ask a provider

• Is my destination airport Level 2 or Level 3, or is it coordinated under EU rules?
• Do I also need PPR at this airport, and if so, who grants it and for what reason?
• Have you confirmed parking and handling, not just the arrival and departure slots?
• What are my best and second best time windows for the slot or reservation?
• What is our backup airport, and how fast can we switch if needed?
• Who will monitor the slot and PPR status on the day of flight?
• What written confirmations will I receive, and when will I get them?
• If we change times, what is the process to change or give back the slot?
• Are any overflight or landing permits needed for this trip?
• Which ground handler will support us, and how will they help if plans change?

Sources: IATA Worldwide Airport Slot Guidelines and coordinated airports page; Council Regulation (EEC) No 95/93; FAA e-CVRS (Airport Reservation Office) guidance; FAA Chart Supplement.

Need someone to sort slots and permissions for your trip? Browse flight support companies in our aviation directory.