The cheapest way to get from your flat to the airport is not by taxi, it’s by Easy Bus!
Taking the Easy Bus to the airport only costs about 10-12 pounds (or cheaper).
Easy Bus goes to each major airport in London (Heathrow, Stansted, Luton, and Gatwick). Just simply go on the Easy Bus website, and select the time and place that is most convenient from your location. Chances are, the location of departure and arrival from the Easy Bus transportation spot may be a little far from your flat, so that is when taking a cheap taxi or a bus to that spot will pay dividends.
Note: You are able to book a time of arrival to the airport and departure from the airport in segments of 15 minutes, 24 hours a day. If you miss your Easy Bus (for example, your bus was scheduled to leave at 12:15, and you missed it), then you are able to get on ANY Easy Bus within an hour. So you can still make the 12:30, 12:45, and the 1:15. After the 1:15, you will have to pay for another ticket.
You also MUST print your ticket (or have the ticket on your phone) to show to the bus driver before you get on the bus.
Easy Bus is extremely EASY and cheap. I highly recommend using it. To book your Easy Bus, use this website.