By definition, if you need to go from point A to point B on specific dates, its not a mileage run.
You have limited options as youre already at a DL hub, and DL only flies to SMF from 4 cities.
Nonstop is coming up on DL for $399 (9.5 cpm), connection in LAX one way for 410 if the miles matter more than convenience (9 cpm). If you connect through LAX both ways, its pricing at around 421 (8.6 cpm). SLC and MSP are doable but more expensive per mile.