The chronology of Lost is divided into three major parts: Pre-crash, Post-crash, and Post-Island. The ongoing Post-crash timeline is divided into monthly segments.
On September 22, 2004, flight 815 departed from Kingsford Smith International Airport in Sydney, Australia, bound for Los Angeles, California. Scheduled flight time was 13 hours. Six hours into the flight, the plane lost radio and radar contact. Two hours later the airplane experienced a catastrophic mid-air break-up into several pieces, crashing onto an island in the Pacific Ocean. Total flight time:8 hours.
- Pre-crash timeline, chronology of events prior to the crash.
- Post-crash timeline, chronology of events after the crash.
- Post-Island timeline, chronology of events taking place off the island after rescue.