Two services go to Heathrow Airport : the Heathrow Express travels non-stop at a premium fare , while TfL Rail takes the same route but calls at most intermediate stations .
Paddington is the London terminus for long - distance high - speed trains operated by Great Western Railway .
Two services go to Heathrow Airport : the Heathrow Express travels non-stop at a premium fare , while Great Western Railway   takes the same route but calls at most intermediate stations .
Paddington is the London terminus for long - distance high - speed trains operated by Great Western Railway .