Airline flight tracking and updates

FlightAware lists live flight delay and cancellation statistics for airline travelers, as well as its Misery Map page.

Google Flights allows you to shop for flights from multiple carriers. You can save a given flight and check its price over time in their Tracked Flights page.

The FAA National Airspace System Status and flight information sites also lists current airport events.  The U.S. Department of Transportation also has an airline customer service dashboard, a cancellation and delay dashboard, consumer protection dashboard, and a consumer guide to air travel.