I am in the planning stages for a trip in Feb. and I am thinking about Seville and Madrid (8 days/7 nights - splitting time between both). One possiblity is to fly into Seville and then travel onto Madrid. Should we (2 adults & 1 teenager) fly (any discount airlines), train, or rent a car (how long)? What are differences with time & cost in mind? Thanks for your help.

Simple answer. Take the AVE train. Cannot remember the cost off hand but it is the quickest way and costs are moderate.

I recommend the AVE route as well.

I would want to know more before endorsing spending an equal amount of time in Seville and Madrid. IMO the former can easily be seen in a couple of days.

Split the journey, spend 4 hours in Cordoba, visit the Mezquita and Alcazar, very easily achievable. There used too be some decent sized luggage lockers at the Cordoba station.

MotorCoach is cheapest. I traveled Madrid-Cadiz on Socibus/Secorbus for about 35 Euro. AVE Madrid-Sevilla or Sevilla-Madrid will cost about 60 Euro (Turista) pp.

At times Iberia offers discounted fares that are cheaper than AVE. Vueling is a Spain discount airline but I don't think it flys a Madrid-Sevilla route.

Carnaval is celebrated in Cadiz around 18-20 feb. It's probably celebrated in other places around Spain but Cadiz is said to have mainland Spain's best 'Fat Tuesday' celebration.

Look at www.aireuropa.com as they sometimes have good deals

Thank you for all your help everyone.

check out iberia for cheap airfare - we flew from barca to madrid for 29e each and the flight was a lot faster than the train

Train AVE is 65 aprox euro per person one way in tourist class. First class is frankly not worth it.