Hounslow Council has published a report showing how a new rail link between Heathrow and Waterloo station could be realised.
The route would run from the existing Waterloo-Windsor line to Terminal 5 via a new station in Bedfont, part of the proposed Heathrow Garden City development.
The report by WSP and Parsons Bricnkerhoff estimates a journey time from Waterloo to the airport of between 43 and 56 minutes depending on the route taken round the Hounslow loop.
Hounslow’s cabinet will consider the report this month.