Selenium and other tools in that class essentially just build an api on top of a standard consumer browser engine(s). There are some differences that are difficult to completely hide, but it’s about as close to real as it gets and can be very difficult if not impossible to tell it’s an automation framework vs a standard web browser.
Travel information is also one of those services where it’s not weird for a significant number of their users to use it quite heavily, making behavioral detection more difficult.
