El Al’s 8th March flight from Tel Aviv to New York carried 280 passengers of which 168 were fully vaccinated. The others, mostly children under 16, took a rapid Covid-19 test developed by Israel’s Sheba Medical Center that gave the results 15-20 minutes later. Everyone passed the test.
https://www.timesofisrael.com/el-al-trials-rapid-covid-testing-for-passengers-prior-to-flight/