Most US airlines have programs for unaccompanied minors, typically with specific age requirements and additional fees. These programs offer assistance and supervision throughout the travel process.

Many US airlines permit pets to travel either in the cabin or as cargo, subject to specific size, weight, and breed restrictions. Additional fees and documentation are usually required.

Passengers can earn frequent flyer miles by signing up for the airline's loyalty program, which allows miles to be accrued based on miles flown or dollars spent. These miles can be redeemed for various benefits such as free flights, upgrades, or other rewards.

Most airlines have a dedicated customer service department where passengers can file complaints, either through their website, customer service hotline, or at the airport. Additionally, the US Department of Transportation (DOT) allows passengers to file complaints through their website.

Most US airlines permit the use of smartphones, tablets, and laptops in airplane mode during the flight. However, usage policies may vary during different phases of the flight, so passengers should follow crew instructions.