I was going to fly from East Midlands airport, as this would have been nearer to my home.
The flight out was at the same time as Liverpool and for the same price (1p! - well £14 when taxes etc added!), but there weren't flights out on Saturday, plus the return flight would have been departing at 06.35.
I found that Easyjet returned on the Monday at 17.25 arriving Liverpool 18.55, so although it cost a bit more (£42.02 including taxes etc) The time was more convenient.
When flying with these cut price companies it's worth considering the convenience of times as well as cost, so look at flying in and out with a different airline if it allows you more time to stay at Your destination!
Madrid Barajas airport (Aeropuerto de Barajas) is 16km North East of the city centre.
Buses, taxi and Metro all provide easy ways to reach the city.
I opted for the Metro.
It is located in Terminal 2 and 4 - well signposted. (it is about a 5 - 10 min walk from Terminal 1)
Please see my next tip for info re. Metro from Airport to the city
***API - It is now compulsary for travellers to Spain to provide information of each traveller prior to departure (name, date of birth, flight number, passport number).
Ryanair notified me of this a few days prior to departure, and provided an easy link to complete my details. Failure to provide this information will result in passengers not being allowed to fly!!! This security check will eventually apply to all other routes****

