I did a cruise and ground package with Flights in late June with an early July return.
MSP-FAI open jaw YVR-MSP First/Business class was 80k.
The MSP-FAI portion remained set and did not budge - but the return YVR-MSP was
variable by as much as 20k miles. Some what less mileage necessary for a one stop via SLC. The last 30 days before the trip the mileage required did not change although for a few days it went up to 100k but then dropped back to 80k.