How long is my ETA-IL valid for?
Your ETA-IL authorization is generally valid for multiple trips over a period of up to two years from the date your application is approved, or until your passport expires, whichever comes first. This means that as long as you received an ETA-IL authorization to travel, you do not have to reapply during the validity period.
If your ETA-IL expires while in Israel, it will not affect your departure.