Exactly Johan, I should have just booked through Expedia like usual, but I went through KLM.com so I could see the fare code.
It just annoys me because I selected that flight so I could attend the whole of a conference I am attending that weekend. Now I will miss most of the last days' proceedings.
Should I phone and ask if there is still a later flight? Or will the just charge me £25? As far as I was aware the flight I had selected KL6678 was the last one out of SLC that day.