This paper investigates the impacts of potential determinants of demand for tourism in Turkey through Markov Regime Switching-Vector Auto Regression (MS-VAR) estimations from 1999 to 2017 on monthly data. The determinants are income level, exchange rates and the threat of terror incidences. The terror variable, following the Global Terrorism Index (GTI) 2017 report, is calculated for Turkey by the author. This research has conducted two separate MS-VAR models to observe the relevant parameters’ signs of the demand for tourism function. Both MS-VAR models revealed that income level and exchange rates have positive influences on tourism while the terror threat has a negative impact on tourism in Turkey. Terror adversely affects the demand for tourism in the short-term in which terror has occurred in the nearest past (i.e., a month ago). The MS-VAR models also yield that a similar negative impact of terror on tourism activities does not appear over the longer periods.