FS9/FSX/P3D. Limited Time Discount For FS9/FSX Purchasers- iFly is providing those who purchased the FS9/FSX version of the iFly 747-400 a limited time upgrade offer to purchase the P3D version of the aircraft for just $19.95. The upgrade offer is only valid until May 15th, 2015. To get this great deal click on the source link below. Otherwise, FS9, FSX, and P3D variants are all the same price: $59.95 USD.