Based on indirect traffic volumes, there is strong demand for flights between the Iberian Peninsula to the Slovenian capital. Services between Madrid and Ljubljana were introduced on a limited summer basis by Vueling’s parent company Iberia last summer. However, Barcelona sees the highest demand between Ljubljana on the Iberian Peninsula. Flights are currently maintained as charters, operated on behalf of tour operators by Trade Air. The route was last maintained on a scheduled basis by former flag carrier Adria Airways, which linked the two cities seasonally over the summer from 2006 until 2012 with two to three weekly flights.