The rule I apply for my clients: aim to arrive at the airport 2 hours before a domestic or Schengen flight, and 3 hours before an international one. From the Le Neubourg area, allow roughly 2 to 2.5 hours on the road to Roissy depending on the time. For an early-morning flight, a comfortable margin beats the stress of the last minute.
The main route towards Paris can fill up fast at peak times. I adapt the route and the departure time to your flight and to traffic conditions, always keeping a comfortable margin. That's the whole advantage of a local driver who makes this trip regularly.
For an airport transfer, booking ahead is no small detail: it lets me secure your slot and plan my day around your departure. You can be sure of having a driver available, even at 5 in the morning. A call the night before (or a few days ahead during busy periods) is enough.
And on the way back, the same principle: give me your flight number and your landing time, and I'll arrange to collect you. I also serve the stations of Rouen and Évreux. For all the destinations, see our airport & train taxi page. And if you need a health trip, I am also a registered taxi in the Eure.