From the West End, take the Piccadilly line; estimate around 50 minutes to Terminal 5

https://telegra.ph/Airport-Transfers-to-Heathrow-Comparing-Shuttles-Minicabs-and-Trains-08-17

From the West End, take the Piccadilly line; estimate around 50 minutes to Terminal 5, and consider traveling off-peak for a more comfortable journey.