The Stated Preference component consisted of 7 choice tasks, each with 3 alternatives described by all of the attributes listed in Table 1. Respondents were asked to list their preferred flight, but were also given a no choice option. Furthermore, respondents were directed to indicate if any attributes were ignored, and were asked if some of the alternatives would never be chosen. An example of the choice screen is shown in Figure 1. A D-optimal efficient design was used, with 12 blocks of 7 choice tasks each..