Until January 2017, travelers who arrived at the Ben Gurion Airport and were planning to continue their journey to Jerusalem (or vice versa) could either take the Egged bus 947, the train, a regular taxi or the cheap taxi company NESHER. Taking the train from the airport to Jerusalem costs less than 20 Shekels but the Jerusalem train station is located far away from downtown. When you arrive at the train station, you have to consider a rather long bus ride or you pay for a local taxi.
Most travelers prefer the NESHER company with their yellow minibuses. You have to book in advance and they take you to different locations in Jerusalem. Costs: 61 Shekels which is still okay compared to a regular taxi.
Now there is a new bus line from Jerusalem to Ben Gurion Airport. The 485 bus where passengers only pay 16 Shekels for a ride. Either from Jerusalem to the airport or from the airport to Jerusalem. The bus leaves every hour in both directions. 24 hours a day. On Fridays, the last bus leaves at 2 pm and will continue right after Shabbat is over.
Bus number 485 passes several stops all over Jerusalem. On Kaplan Street where the government building are located, on Jaffa Road and somewhere outside the Central Bus Station.