...and to clarify, DL did serve SLC with non-stop and one-stop service (shared the flights with YYC). They pulled out and then either the ORD or the DEN service kicked in (I can't remember which) on CP/AC.

Also, NW used to only use the D9S on the MSP route. They now use the A319. Plus, they are bringing in a third frequency for the summer (the third frequency was always seasonal, correct?)