Statistics make for nasty college classes but are great for predicting the likelihood that a particular flight, route, or airline will be delayed. Now, I wouldn’t plan my trip based on, but it might be useful for when you are picking up a friend or family member.

For real time flight tracking (only within US airspace) don’t forget FlightAware.

There's Another Washington D.C. Space Museum 30 Miles Outside The City, Very Worth The Drive