Hi we wanna leave Barcelona on the 26/6/13 and go to Portugal just want the cheapest option on getting there is if you can let me now that would be great thank you.
What - anywhere in Portugal?
The cheapest will clearly be bus - www.alsa.es will get you to several places.
Actually a discount airfare might be cheaper than the very, very long bus ride. Be sure to factor in the costs for transit to/from bus stations and airports as well as food costs for the long bus ride.