Go to a website that continually updates the status of flights on all of the major national and international airlines. Alternatively, you can check on your airline's website.
Navigate to the website of your choice and search for your airline and flight number. Make sure your flight is on time, or look for the next available flight you can get on.
Call your airline if you do not have access to a computer. Make sure you have your flight number ready. Be aware that wait times can be lengthy when you call many airlines.
Check for a canceled connecting flight while you are still in the air on your original flight. Many airlines allow you to use smartphones or laptops while you are in the air. If you find that a flight is canceled, you can likely get on the next available flight online more quickly than standing in line at a customer service desk once you arrive at the next airport.