Israel welcomes you, all visitors must hold a passport that is valid for at least six months from the date they are departing the country. In case of US, Canadian, Australian, British citizens a valid passport from respective country is all that is needed that will be valid six months from the date of departure.
Visitors are entitled to remain in Israel up to three months from the date of arrival, in accordance with the visa conditions issued.
No visas are required to enter Israel for US, Canadian, Australian, British citizens. If your tour is a combination tour with other destinations, please contact the respective consulate or visa agency of your country destination in order to determine travel document requirements. You can also use the services of iVisa. Complete the easy online application and pay with credit card or PayPal. No need to deal with the embassy. iVisa.com does it for you so you don't lose valuable time. Present your Passport and the Document iVisa.com provides upon entry to destination country.
Additional information can be found at the Ministry of Foreign Affairs. You can also see the Tourist Visa Table provided by the Ministry.