You may check "All" for either departure or destination location to increase search flexibility.  In addition to locating Posts on your exact search date (displayed first in black), this query will also display matching Posts 1, 2, or 3 days ahead (displayed in red).  When searching for passengers you may include up to 8 sequenced intermediate locations along your travel path.  This single query will locate all matching passenger posts along your route, even between intermediate cities!