By national express bus....I have to know is , will the bus stop before terminal 4 or some where near .. I have a get a flight from the airport.

If the bus timetable says it will stop at Terminal 4, then it will stop at Terminal 4 and you can just walk into the terminal building. If it only stops at the central bus station, you can get a free bus or train to Terminal 4 from there.

Direct drop offs at Terminal 4 -

http://www.nationalexpress.com/wherewego...

Yes, they let you off in Heston and you walk the last 4 miles.

Thanks