There is a 'sherut' taxi or van service which departs whenever the car fills up, and takes you to Haifa for a reasonable rate. In June, they should fill up fairly quickly. Travel time, about an hour and a quarter. The bus is not very frequent and takes longer. If you would like to be met at the airport by a private taxi, let us know by email.
Car rentals are cheapest if arranged from abroad.
This road begins as Flieman Street, then turns into Avraham Weinshal Street and towards the top changes its name to Sigmund Freud Street, which leads to the Horev Center. Do NOT take this road. Take another left back towards the Eshkol Tower. Present this letter to the attendant at the barrier.