Starting May 20, unvaccinated international travellers flying into Saudi Arabia must quarantine for a week in government-approved accommodation.
That's according to the Saudi civil aviation authority (GACA), which said the rule will not apply to individuals who can present their vaccination certificates.
Airlines have also been instructed to add the cost of the quarantine to the ticket price.
International travellers aged over eight must also present a negative PCR test with a validity of 72 hours.
Meanwhile, Saudi citizens, flight crews and diplomats will have to quarantine at home unless they are vaccinated, state news agency SPA said, citing an interior ministry official.
It's part of efforts by the authorities to stop the spread of COVID-19 as the Kingdom reopens its borders.

Keiko Fujimori declared winner of Peru presidential race
Ukrainian rescuers clear rubble as Kyiv mourns 30 killed in Russian attack
Monaco blast suspect is a Ukrainian woman who fled to Germany
Clinical trials begin for two potential Ebola treatments
India issues notice to Telegram, Signal on concerns over usernames, source says
Blast at Damascus cafe kills nine, wounds 20
Rebels in Indonesia's Papua kill American pilot, burn plane
Russian air strikes kill 10, injure more than 50 in Ukraine's Kyiv
