Charterguy,
Regarding "Orly is only open to French airlines" you are wrong.
The following use Orly:
Royal Air Maroc
Syrian Arab
Iberia
Egyptair
Biman
Tunis Air
Lufthansa
Cubana
Turkish Airlines
TAP
Air Malta
Iran Air
Also "no flights between 1200-1500 hrs" is again wrong. There are 42 flights scheduled to depart Orly between those hours today (23rd Oct 2001).