Texas, I switched planes there and had lunch at BurgerKing while waiting for the plane to arrive…
Kansas I vaguely remember, but I can’t remember if we actually went INTO kansas or just took our picture at the “now entering kansas” sign.
New Mexico, I drove through there 3 times. Two of the times we went to 4 corners thing. The third time they had turned it into a tourist trap and were charging $20 per car to go in. We never drove through the 4 corners area to go to california again after that. 
The limit to my visitation of Montana was staying at West Yellowstone for 3-4 nights.