I'm interested to know which non-stop U.S. domestic routes offer YUP (or Y-UP) fares for non-elite travelers and on which airline.

For those who are not familiar with YUP fares, on such routings where they are available, the passenger qualifies for an immediate upgrade to first class if a first class seat is available at the time of ticketing, even if the passenger is not a member of that airline's FF program.

The only market I'm currently aware of that offers non-stop YUP fares is IAH-MSP. Please add to the list. I'm aware that TW offers this on routings via STL, but I'm only interested in non-stop routings.