Originally Posted by SEA_Tigger
Do they really care? I use the South Main Terminal checkpoint when the loads are light when departing from the North Terminal on UA instead of using the North Main Terminal checkpoint (I hop the shuttle between the SMT stop and the NMT stop, then on to the NT).
Of course, all SEA terminals are connected airside, but I would think that wouldn't make a difference.
Yes, a lot of ID checkers do care. I don't know about TPA personally, but it does happen a lot.