It used to be normal in the U.S. to walk people to the gate until 9/11.

Now you can escort someone to the check-in counter and up to the security checkpoint, and meet people at the luggage area to help with bags.

But in practice it seems rare to do so if there isn’t a particular reason, probably because you’d have to pay to park or ride transit and it’s usually a trek beyond that. Honestly if they allowed you to go through security with the passenger and wait at the gate, I’m not sure how many people would even do it here (or how many passengers would want their loved ones to do so).

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seg_lol an hour ago | parent [-]

You can walk someone to the gate, you just have to have a ticket.

	▲	pigggg an hour ago \| parent [-]
		Post 9/11 you could get a waiver from the ticket counter to escort someone thru security all the way to the gate. Dunno if that's a thing anymore, but I had them print out a paper and showed it at security several times in the mid 2000s.