The best way to get from Ben-Gurion Airport to Netanya is by train, and it takes 45 minutes. There is also a direct bus, but it will take longer. Both trains and buses depart from Terminal 3 at the airport and are cheap.
Taking a taxi would be expensive, and you may have traffic problems. Please note that the train doesn’t operate from Friday morning to Saturday evening. Bus #950 runs on weekends every 15 minutes during day hours, and bus #905 runs every hour at night.
Between Netanya and Wingate Institute you can take buses #947 or #601.