The cheapest flight to Prague you can get by boooking 7 days before departure.
The most popular airlines on the route Paris - Prague: Czech Airlines (OK), Transavia (HV), Vueling (VY).
The cheapest flights you can book on the route Orly (ORY) - Ruzyne (PRG).
Direct flights last about 1h 35min.
Direct flights available 7 days a week.
Direct flights: Transavia (HV), Iberia (IB), Czech Airlines (OK).