@ dan: is this also true for flights worldwide?
No, as infants need tickets for flights outside the US.
And in the usa they fly for free?
yup
But you still need to include the infant on the ticket. You'll still get through but it'll be a hassle IME.
so whats the big deal? he can just make an infant ticket for the second leg
And then you'll pay 10% of the full walk-up Y fare
And then you'll pay 10% of the full walk-up Y fare, but sure, it should be doable.
im not sure i understand what youre saying. he can issue an infant ticket ahead of time on only half the itinerary
You sure about that? If I'm flying CDG-FRA-TLV you can pay for the infant on just FRA-TLV?