The price you are quoted for a ticket is usually the price the air carrier sets for air transportation. Some air carriers include other charges, such as air navigation fees, in their advertised fares in newspapers or online. Taxes and carrier-imposed surcharges are usually extra. Airport improvement fees may also apply.
Check with your air carrier or travel agent to find out how much your total air travel cost will be, including all additional charges. Before paying a fare, you should determine what the "bottom line" cost is.