Many airlines fly to Tel Aviv from pretty much all over the world. Budget choices from Europe include low cost airlines such as Easyjet, Ryanair, Wizz Air, Vueling, and more. Note that these can be prone to delays and cancellations, though most airlines are nowadays.
Fancier choices include Swiss, Virgin, Lufthansa, etc., while from north America you can fly with Delta, United, American Airlines, and possibly others.
Israel's national airline is the notorious El Al, which flies to and from pretty much anywhere Israelis are allowed to go to.