Picking up a friend at the airport? You can get the latest flight info in macOS High Sierra. Here’s how:
Press Command-Space to open Spotlight, then type the airline and flight number to see the status. If you end up with multiple results in the list, you can just click through them to find the particular flight you’re looking for.
(This how-to is based on my experiences and info on Apple's support pages — where the images sometimes come from.)