I will be flying from USA Chicago to LIS and return. ( Economy )
And one ticket from UK London to LIS and return ( Economy)

I am concern about the exact size of the carry on size 22x16x8
Are the wheels part of the 22" and is the thickness has to be 8" and not 9" or 9.5".
My carry on are like 9" thick so afraid they wont fit in the measuring box they used.
If that's the case then i need to get an 8" thick carry on.