Hello. My daughter and I will be arriving at London Heathrow airport about 14:00 on June 22. We are staying near the Archway tube station. I used the transport for London website to figure out how to get from the airport to that tube station, but the route provided began with leaving the airport on the Heathrow Express. I would like to forego the expense of the Express and take only tube trains to my destination. I have the following questions about this:
1) Is it possible to take just the tube from Heathrow Airport to Archway Tube Station?
2)If so, how do I do it; ie what line do I take from the airport and where/when do I transfer to end up at Archway station?
3)Approx how long should it take from the time I board at the airport until I get off at Archway?
4)I plan to buy 7-day travel cards for our 5-day stay in London for zones 1 and 2. Am I correct in understanding that I can buy that card at the airport (where exactly?) and add to it for the trip from the airport into London?
5) What is the approx add'l cost to travel from Heathrow?
Thank you for your help.