Feltham Train Station

Easy to get to Waterloo in 27 mins via a fast train, and could take up to as much as 40 mins on a slow train. Most trains do stop here (fast or slow), so this is a fairly busy train station.
There are lots of businesses in the area, which is why you will see many professionals get on and off the train at this station.
This is the last train station on the Southwest line that accepts the oyster pay as you go; so, beyond this train station, make sure you have a valid paper ticket.
There is a little café on the Eastbound platform that makes good coffee and stocks fresh croissant and bake treats and another not so good café/​deli outside the ticket gates.
Lots of buses on the Eastbound platform exit that take you everywhere from Hatton Cross to Richmond, to Heathrow Central. You can call a quick cab that will take you to the Heathrow terminal in less than 10 minutes.

The same as most train station, though if you’re going via the Hounslow route be prepared to wait up to half an hour for a train.