Travelmath provides an online direct flight finder to help you determine whether there is a non-stop flight to your destination. Nonstop flights can be faster, since they don't require you to change planes or stop at a connecting airport. However, sometimes you can't find any non-stop flights between two cities. In that case, you may want to search for a direct connection that goes through an airline's hub. You can use the flight search engine on this site to find the best airline routes for your trip. Enter any city or IATA airport code to check for direct flights.
If you're just trying to figure out frequent flyer miles, you may want to get the flight distance or flight time. You can also search for the nearest airport to your destination, or view a list of airports in any state or country.