Like that "Come Fly With Me" tv show stunt.
They had a rip off of Ryanair called "Our Lady Air".
Cabin crew: "Dear Passengers, we will soon be landing at our destination."
Passenger: "But we've only been in the air an hour?"
Cabin Crew: "Oh see, to save money, we land at airports outside the main cities. We are now landing at Barcalona-Shannon airport."
Passenger: "But thats miles away from Barcelona!"
Cabin Crew: "Dont worry, you can purchase transfers at a low cost to bring you to Barcalona. It goes Shannon-Rosslare, Rosslare-Wales, all the way back across the UK to the channel tunnel, then onto france and finally from northern france all the way over to Barcalona!"
Seriously though, they will need to do it with the main airports because nobody's going to drive across a country with completly different laws, cultures and currencies to the European countries.