Flight Paris Orly Airport departs from Paris Paris Orly Airport at 15:55 and arrives at Algiers Houari Boumediene Airport at 18:05.
The flighttime is about 3h 10m. The distance travelled ("as the bird flies"): 1340 Km. So the average speed is roughly 423 Km.
There is an 1 hour time difference between Paris and Algiers