Hi Antione there are plenty of places to view the flying display from at Farnborough. My website has a map of most of these http://www.farnboroughspotters.com/viewing.html
. Best places are Eeelmoor Bridge if runway 06 is in use. If 24 in use the north side of the airfield near the main entrance to TAG Aviatiion (plastic plane on roundabout), both these require a car and you may have a 15 min walk from a parking place.. If you are coming by train head for the area marked RAE road on the map, here is the Swan Pub which is right under the final approach for runway 24.