United Airlines has a low $67 fare each way between San Jose, California SJC and Detroit DTW for departures into May 2016. Low fares are Tuesday and Wednesday, with some Saturday departures. Low fares tend to be one-stop flights via Houston IAH.
United Airlines San Jose SJC – Houston IAH – Detroit DTW
$66.60 one-way Wednesday April 6
United Airlines base fare = $44.00 for Mileage Plus calculations.