The objective of this research is to identify and compare the behaviour of airline ticket prices via the distribution channels of Online Travel Agencies (OTA) media and the Official Website. This study employs a time series analysis approach to process time series data in the form of airline ticket prices obtained from online media, including both official websites and Online Travel Agents (OTA). While the data collected is the published price on two Indonesian airlines, namely Garuda Indonesia as a Full-Service Airline (FSA) and Lion Air as a Low-Cost Carrier (LCC), both with flights between Jakarta (CGK) and Surabaya (SUB). This route was chosen since it is the busiest route and airport in the world, not only in Indonesia. Furthermore, these two cities are the busiest cities in Indonesia. Meanwhile, online media (a website) was chosen due to the characteristics of Indonesian consumers, who are the most frequent internet users. According to the findings of this study, there is almost no significant difference in airline fare behaviour in the FSA and LCC categories via both online distribution channels, the official website and OTA. The study's limitation is that it did not test in terms of demand (passengers) and passenger capacity. The researcher hope that this study will serve as a baseline for future research from a wider viewpoint. Furthermore, from a practical standpoint, this research can show the best period for consumers to purchase domestic airline tickets. The most competitive prices are offered by FSA airlines on the third or second day before departure. For low-cost carriers, the best price offers are available 30 to 20 days in advance and 3 to 1 day before departure.