1. elapsed time-the time that elapses while some event is occurring. period, period of time, time period-an amount of time; a time period of 30 years; hastened the period of time of his recovery; Picasso's blue period.
With a journey time of 15 minutes between the airport and London Paddington, and departures every 15 minutes, Heathrow Express offers the fastest journey time. 1  Heathrow Express train service between London and Heathrow Airport.  Visit Heathrow Express online:www.heathrowexpress.com.
Trains from Heathrow leave every 15 minutes and the journey to London Paddington takes about 15-20 minutes. Trains to London leave Heathrow Airport from approximately 5am until 11.55pm. Standard adult fares are Â£21.50 for a single ticket purchased online or at a ticket office/machine (or Â£26.50 when purchased onboard).