One of the unique features of Google Now on Android phones is its ability to know what you have planned, thanks to your emails and calendars. So if you have an upcoming flight, closer to the date it will begin display that flight information via Google Now cards to keep you informed of the status and to act as reminder.
Interestingly enough it turns out that iOS 9 and Apple’s OS X El Capitan has that feature as well, but for some reason Apple did not show it off during WWDC. According to the report from 9to5Mac, it seems that this feature is sort of similar to what Android has where it can be accessed in the new Spotlight section.
However unlike Google Now which is automated as it scans your calendars and emails, this flight tracking feature on iOS 9 and OS X will need to be enabled. Basically if there are any mentions of a flight in your Notes app, your calendar, or even in your email, that flight number and name will become actionable.
Users will be able to long-press the link, after which they will be able to select the “Preview Flight” button. From there information about the flight will be pulled up, such as what time it will/has departed, and what time it will land/has landed. It will also be able to tell you if a flight has been delayed, and will also pull up a map to show you the route and where the plan might be at the moment.