Slots required at all Paris airports until mid-Feb

France is slowly rolling out a new ATC system called 4-Flight, and from Jan 9 to Feb 14 there’s a live trial happening which is going to cause delays at all four airports in the Paris area: LFPB/Le Bourget, LFPG/De Gaulle, LFPO/Orly and LFOB/Beauvais.

Ops to Paris = a grey and joyless experience for the next few weeks.

During this period, the operational capacity for the entire airspace will be reduced by 30%. The real-world result of all this is that LFPG and LFPO will have fewer slots available, and LFPB and LFOB will require slots (normally they don’t).

For GA/BA flights headed to any of these airports, you should request slots via your handling agent, and you need to make sure you add the slot ID number to your flight plan, in a very specific format:

RMK/ASL directly followed by the 14-character authorization number, 
the first 4 of which are the ICAO code for the aerodrome for which 
the slot has been issued :
RMK/ASL (14 CHARACTER AIRPORT SLOT ID).

Example :
RMK/ASLLFPBA123456789 (arrival) or RMK/ASLLFPBD123456789 (departure) 
for Paris-Le Bourget.

There may also be some impact to overflights through the Paris ACC – especially at weekends when it’s busy with ski flights heading south to the Alps.

Check AIC 19/23 for more info.

One Comment

Neil Patton says:

17 June, 2025 at 9:14 pm

There are more than 4 airports in the Paris region.
LFPM was not and is not slot limited.
It’s also 24/7 and open for all private/corporate aircraft traffic up to Global 7000/G700 and Falcon 8X class.

Slots required at all Paris airports until mid-Feb