I think the challenge for CoDA is similar to those for all smaller airports, in cases where large low cost carriers are expanding from larger airports in close proximity to them...a smaller regional operator like Flybe or EIR that would provide a better frequency on a daily service from Derry to a London airport will have a different pricing structure than Ryanair or Easyjet...and thus unless the service is subsidized to keep it competitive the consumer will decide based on price and convenience...