Belgium Slot Coordination (BSC) assists with slot coordination at the airport of Brussels- Zaventem.
An adequate level of service quality should be maintained for the quality, flexibility and effectiveness of the coordination process to improve. In accordance with the European Council Regulation 95/93 as amended, IATA Worldwide Slot Guidelines (WSG) and local rules, ACNL is obligated to monitor the use and adherence of allocated airport slots.
For the restarting of the passenger flights Belgium Slot Coordination (BSC) worked together with Brussels Airport Company to establish the list of flights and the rules to be applied for the handling of airport slots and for a limited period ending on Sunday 1st of May 2016.
The international coordination process provides the possibility for air carriers that do not meet the slot series 80% usage target to justify their case with the coordinator within a specified deadline.

Within the period during which COVID-19 coordination parameters apply and in order to enable the proper application of such coordination parameters, the coordinator may amend the timing of requested or allocated slots falling within the period specified in paragraph 2a of Article 10a or cancel them after hearing the air carrier concerned.

A landing slot, takeoff slot, or airport slot is a permission granted by the owner of an airport designated as Level 3 (Coordinated Airport), which allows the grantee to schedule a landing or departure at that airport during a specific time period.^[1] Slots may be administered by the operator of the airport or by a government aviation regulator such as the U.S. Federal Aviation Administration.^[2]

Landing slots are allocated in accordance with guidelines set down by the International Air Transport Association (IATA) Worldwide Airport Slots Group. All airports worldwide are categorized as either Level 1 (Non-Coordinated Airport), Level 2 (Schedules Facilitated Airport), or Level 3 (Coordinated Airport). At Level 2 airports, the principles governing slot allocation are less stringent; airlines periodically submit proposed schedules to the administrating authority, rather than historic performance. Participation is not mandatory, but reduces congestion and non-participants are penalized if the airport must later be designated level 3.^[2]

As of summer 2017, a total of 123 airports in the world are Level 2 airports, and 177 are Level 3 airports.^[3]

Allocated landing slots may have a commercial value and can be traded between airlines. Continental Airlines paid US$209 million for four pairs of landing slots from GB Airways at London Heathrow Airport, $52.3m each.^[4] The highest price paid for a pair of take-off and landing slots at Heathrow Airport was $75m, paid by Oman Air to Air France–KLM for a prized early morning arrival, reported in February 2016. A year before, American Airlines paid $60m to Scandinavian Airlines.^[5]

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Heathrow slot valuations^[6]
Year	Buyer	Seller	daily slot pairs	transaction (£M)	slot value (£M)
1998	BA	Air UK	4	15.6	3.9
2002	BA	BA Connect	5	13	2.6
2002	BA	SN Brussels	7	27.5	3.9
2003	BA	SWISS	8	22.5	2.8
2003	BA	United	2	12	6
2004	Virgin	Flybe	4	20	5
2004	Qantas	Flybe	2	20	10
2006	BA	BWIA	1	5	5
2007	BA	Malev	2	7	3.5
2007	BA	BA	7.3	30	4.1
2007	Virgin	Air Jamaica	1	5.1	5.1
2007	BMI	77.7	770	9.9
2007	unknown	Alitalia	3	67	22.3
2008	Continental	GB Airways/Alitalia/Air France	4	104.5	26.1
2013	Delta	unknown	2	30.8	15.4
2013	Etihad	Jet	3	46.2	15.4

As supply is limited, slot trading became the main solution to enter Heathrow and transfers grew from 42 in 2000 to 526 in 2012 and over 10 years the average priced slot was equivalent to £4 per passenger.^[7]

If an airline does not use an allocation of slots (typically 80% usage over six months), it can lose the rights. Airlines may operate ghost or empty flights to preserve slot allocations.^[8] To avoid pollution and financial losses caused by an excessive number of empty flights, these rules have occasionally been waived during periods of temporary but widespread travel disruption, including after the September 11, 2001 attacks, and during the SARS epidemic, the Great Recession, and the COVID-19 pandemic.^[9]

Level 3 coordinated airports^[3][edit]

Australia[edit]

Austria[edit]

Innsbruck Airport (winter season only)

Belgium[edit]

Brazil[edit]

Cambodia[edit]

Canada[edit]

Cape Verde[edit]

Colombia[edit]

Cuba[edit]

China[edit]

Czech Republic[edit]

Denmark[edit]

Finland[edit]

France[edit]

Germany[edit]

Ghana[edit]

Kotoka International Airport - Accra

Greece[edit]

Chania Airport (summer season only)
Chios Airport (summer season only)
Corfu Airport (summer season only)
Heraklion Airport (summer season only)
Kalamata Airport (summer season only)
Karpathos Island National Airport (summer season only)
Kavala Airport (summer season only)
Kephalonia International Airport (summer season only)
Kithira Airport (summer season only)
Kos Airport (summer season only)
Mykonos Airport (summer season only)
Mytilene Airport (summer season only)
Patras Airport (summer season only)
Preveza Airport (summer season only)
Rhodes Airport (summer season only)
Samos Airport (summer season only)
Sitia Public Airport (summer season only)
Skiathos Airport (summer season only)
Thira Airport (summer season only)
Volos Airport (summer season only)
Zakynthos International Airport (summer season only)

Level 3 coordinated airports^[3][edit]

Australia[edit]

Austria[edit]

Belgium[edit]

Brazil[edit]

Cambodia[edit]

Canada[edit]

Cape Verde[edit]

Colombia[edit]

Cuba[edit]

China[edit]

Czech Republic[edit]

Denmark[edit]

Finland[edit]

France[edit]

Germany[edit]

Ghana[edit]

Greece[edit]

Brussels Slot Coordination System

Greenland[edit]

Hong Kong[edit]

Iceland[edit]

India[edit]

Level 3 coordinated airports[3][edit]

Australia[edit]

Austria[edit]

Belgium[edit]

Brazil[edit]

Cambodia[edit]

Canada[edit]

Cape Verde[edit]

Colombia[edit]

Cuba[edit]

China[edit]

Czech Republic[edit]

Denmark[edit]

Finland[edit]

France[edit]

Germany[edit]

Ghana[edit]

Greece[edit]

Brussels Slot Coordination System

Greenland[edit]

Hong Kong[edit]

Iceland[edit]

India[edit]

Level 3 coordinated airports^[3][edit]