SLC is a very efficient airport that Delta basically controls. If the flight from AMS arrives on time or early, customs should be quick and they'll make the flight no problem. Virtually all Delta mainline flights now arrive and depart from Concourse A. All JAC flights are mainline. The biggest problem is that if they misconnect, the first flight of the day to JAC isn't until 11:00 am each day. So they would be delayed about 15 hours.