Airlines treat children traveling alone differently depending on the age of the child. Most airlines have a minimum age for their unaccompanied child service, typically five, and a maximum age, typically 12.Children younger than the minimum age will have to travel with an adult.irlines treat children traveling alone differently depending on the age of the child. Most airlines have a minimum age for their unaccompanied child service, typically five, and a maximum age, typically 12.
The fee is $110 for award flights. There is no fee to change or cancel a flight ticketed within 24 hours, so long as the reservation was made at least 7 days prior to departure. United Airlines charges change fees of $200 for domestic flights and up to $400 or more for international itineraries.
Passengers who make a same-day change to their flight are subject to a $75 change fee. Change fees for flights that result in a date change are subject to more expensive change fees; the exact price is determined by the airline based on the type of ticket the passenger purchased and what type of change is being made. Same-day change fees on United Airlines cost passengers $75. For changes to a ticket that extend beyond 24 hours of the original flight time, passengers must pay a $150 flight change fee for domestic flights, and $250 for international.