Honolulu would be our pick. I had my wife fly through HON with a connecting flight to PHX in May of last year. We picked that so she would have the least amount of connections possible and no connecting flight in other countries. She said it was a super easy time in customs, only took a minute or 2 and she was on to waiting for her flight to Phoenix. She had never flown before and was a little concerned about navigating a much larger airport like LAX before coming to Phoenix. Section from he said everyone in HON was very nice and helpful. The only thing they asked her was if she had any chicharrónes in her bag 😁
On a side note. On her connection from HON to PHX she sat in a wrong seat, a first class seat. A young woman in a military uniform said "excuse me, I think you are in my seat". My wife started to get up but the young woman smiled and asked her what seat she was supposed to be in. She showed her the boarding pass and the seat was back in coach. The military woman told her to stay in first class seat and she took her seat in coach. Could not have been a better experience on her first trip and first time in the US.