By plane
Ben Gurion International Airport TLV Is the main international airport serving Israel and the West Bank. From Ben Gurion it is cheapest to take a "sherut" shared taxi to the bus station on Nablus Road by Damascus Gate, and then follow the directions above to Nablus. A sherut from Ben Gurion to Jerusalem costs 50 NIS and runs constantly 24 hours a day.
By bus
Ramallah and Jerusalem: From Jerusalem, take the #18 bus to Ramallah. The bus departs from the bus station off Nablus Road north of Damascus Gate and the Old City. A #18 bus leaves every 10 minutes throughout the day, and it costs 7 NIS. This bus will drop passengers off at the main street in Ramallah, but stay on until the main bus station. From the Ramallah Bus Station, a bus runs to Nablus 10 NIS as of July 2010 but the last bus leaves early, often around 4pm. If the last bus has already left a servees taxi will take you to Nablus from Ramallah for 17 NIS as of November 2011.
Other West Bank Cities: Servees taxis are easily found to Nablus from all major west bank transportation centres including Jenin 20 NIS, Tulkarem, and other cities.
As of July 2010 there are no check points for buses/servees taxis entering Nablus from other West Bank cities, although you will need your passport and visa stamp to enter back into Israeli territory upon your return. As of June 2009, the IDF is now allowing many cars and buses to pass through the checkpoints surrounding Nablus without dropping their passengers off at the walking checkpoint. This is subject to change without much warning.
Leaving Nablus through the Huwwara checkpoint on foot is more complicated and on average takes half an hour except during work "rush hours," during which the process can take several hours. Women undergo less security in the rightmost queue and as a foreigner one might try this row as well. The time of this process depends on the attitude and the mood of the Israeli soldier. If you carry bulky luggage, this will be x-ray scanned by a portable scanner across the road. The military will keep your passport whilst you have your bags screened. Walk through and look for a taxi or servees taxi to your destination.
Servees minibus taxis leaving Nablus tend to congregate around the center of town, ask the drivers which cities they're going to until you find yours. There's also a servees taxi station near the center of town, ask where the "muHattat al-busaat" is. There is a bus that goes to Ramallah 10 NIS from the station, but the last bus leaves at 4pm. A servees taxi to Ramallah costs 15 NIS, and from Ramallah the bus to Jerusalem is 7 NIS and leaves from the main bus station in Ramallah. As of July 2010, you won't encounter any checkpoint or need to show your passport to go to Jenin or Ramallah, although you will need your passport and visa stamp to enter Israeli territory.