Hugh @ Skyscanner
suggested this on July 12, 2012 12:12
Many of our users are interested in flying in and out of different cities, doing stop overs or flying back from a different airport. We are currently looking at a solution which would let you compare multi-city flights on our site and book through airlines or travel agents offering this option, just as with other types of flights. We know this is popular, and our team are investigating solutions at the moment - please vote if you want to tell them to speed up!