From America West's web site:


America West Airlines defines an infant as a child under 2 years (24 months) of age. There are two options available for infant passengers.

Lap Children
An infant which travels on the lap of the passenger is called a Lap Child. One infant per ticketed passenger 12 years or older will be accepted without charge.

Reserved Seating
For an infant to travel in their own seat, a ticket must be purchased. America West Airlines offers a 50% discount off the traveling adult fare for one (1) infant ticket per adult paying passenger, 12 years or older. A Federal Aviation Administration (FAA) approved child seat must be used. (emphasis added)


I would like to buy a separate seat for my 18 month old and use the regular seat belt (he's the size of an average 24 month old). Will the FA's have a problem with that?

(I posted this in the America West forum but got no responses).