UA has sub-$1000 fares on this route, but you need to leave on a Friday, not a Saturday, to meet the minimum stay requirements. When you depart on a Saturday, your arrival will be on a Sunday and you cannot return until the following Sunday in order to meet the min stay fare requirements.
TRAVEL FROM LAST STOPOVER MUST COMMENCE NO EARLIER THAN THE FIRST SUN AFTER ARRIVAL AT TURNAROUND.