Everyone who flies on commercial airlines has encountered delays. Maybe you have been bumped…told that you will have to take a later flight.
Or maybe your flight was delayed, sometimes by bad weather, sometimes by lack of available crew members, sometimes by a mechanical problem.
Worse than a bump or a delay is having your flight cancelled. That will leave you scrambling for a new way to get to your destination.
When any of these circumstances occur you do have some rights, and this blog post explains what they are.