To get to London Heathrow Airport from the city, you have several options. There are trains such as Heathrow Express or TfL Rail that connect the city to the airport. The cost depends on the train type and the distance traveled, with prices ranging from approximately £6 to £25. Buses, like the National Express or local buses, are another option, with prices typically ranging from £5 to £20. As for the taxi ride, the cost can vary depending on factors like traffic and distance. On average, a taxi ride to Heathrow Airport from central London can cost around £45 to £70.