The progression of a flight is typically categorized into several distinct operational phases. While different aviation bodies use varying classifications, a standard 10-phase model includes: 1. Pre-flight Planning (weather checks, fuel calculations); 2. Set-up and Briefing (cockpit configuration and crew coordination); 3. Engine Start and Push-back (leaving the gate); 4. Taxi (navigating to the runway); 5. Take-off (acceleration and liftoff); 6. Climb (ascending to cruise altitude); 7. Cruise (the level portion of the flight); 8. Descent (leaving cruise altitude for the destination); 9. Approach (aligning with the runway); and 10. Landing and Taxi-in (touchdown and returning to the gate). In 2026, many modern flight management systems (FMS) automatically transition through these phases, though the "Critical Phases of Flight"—usually defined as anything below 10,000 feet—remain the most intensive for pilots, requiring a "Sterile Cockpit" where non-essential conversation is prohibited to ensure maximum safety during high-workload maneuvers.