There needs to be far more advertising of Volotea from SOU and the same could be said for the Vueling BCN route a few years ago as the local catchment area are unaware of where they can actually fly too from SOU.
I have just returned from BCN with BA from LHR and I spoke to three couples from Southampton as well as two couples from Bournemouth that were using the flight, surely there is a demand for a flight to BCN again as its a very popular city especially as I visit it for work as well as for leisure at least six times a year.
I would like to see Vueling have another go at SOU and hope that Volotea return for next year as SOU needs some variety regarding airlines and destinations especially considering the wider affluent catchment area of the airport.