What are my rights as an air passenger?
The EU has gathered the official rules for air travel from/to the EU here - EU Air Passenger Rights:
Other areas/countries have rules very similar to these. As a passenger you should familiarize yourself with your rights. You can always demand an airline to pass the rules on to you. It is good to know what your rights are if you are denied boarding or if your flight is delayed or your luggage is delayed or lost in transit.