The US FAA has required 1500 flight hours to receive an ATP (airline pilot) certificate since 2010: https://www.ecfr.gov/current/title-14/chapter-I/subchapter-D...
South Korea requires 250 hours as a country (6x), and Jeju Air specifically requires 300 (5x): https://epicflightacademy.com/hiring-requirements-jeju-air/#...)