These are 1965 newspaper advertisements for holidays to Spain and the Balearics and the cost seems to be an average of about £35 which may not sound a lot now but to put that into some sort of perspective in 1960 my dad took a good job at a salary of £815 a year so that fare would have been about two and a half weeks wages! Each! The average weekly wage in the United Kingdom today is £490 so on that basis a flight to Spain at 1957 British European Airline prices would now be about £1,225 so some things in life have defied inflation and become cheaper.
I have posted about this before and you can read my story of 1960s Spanish holidays to Benidorm here:
http://apetcher.wordpress.com/2010/03/02/every-picture-tells-a-story-benidorm-c1960/
Age of Innocence 
this picture dont really explain much about the hoildays in the olden days