an airport ticket counter. American charges $10 for tickets purchased at their travel centers and airport ticket offices and $5 at reservation offices.
Baggage. Airlines have a free baggage allowance, which includes two checked bags, one carry-on, and one personal item such as a handbag, laptop, or stroller. There are three different types of baggage fees: excess, overweight, and oversize. To avoid overweight and oversize fees, baggage should weigh less than 50 pounds and be fewer than 62 inches. Overweight fees are commonly $25 if your bag is less than 70 pounds and $50 if it is less than 100 pounds, while oversize fees are usually $80 at most airlines. Bags weighing more than 100 pounds or those longer than 80 inches might not be accepted at all.
Minors. Unaccompanied minor fees are approximately $40 for nonstop flights and $75 for connecting flights, per direction. The definition of minor varies by airline, but in general, a child is considered to be between ages 5 and 14. American, United, and U.S. Airways prohibit children ages 5 to 7 from having connecting flights. International flights incur additional fees.
Standby. These fees pertain to upgrades only. A few national airlines have standby fees. Delta’s fees vary from $50 to $150 depending on mileage. U.S. Airways has a flat fee of $25.
Since charges vary, it’s important that you contact your particular airline.