What is Block Time? How Airlines Pad Flight Schedules
Why scheduled flight times are often longer than actual flight time, the role of block time, and how airlines use padding to maintain on-time records.
FlightyFlow Team·· 6 min read
Block vs flight time
- Flight time is from wheels-up to wheels-down.
- Block time is from gate-out to gate-in (push-back to arrival at parking).
Schedules are written in block time.
Why airlines pad
If an airline schedules a flight for the actual average block time, half the flights will be "late" by definition. Padding ensures more flights show "on time" in the official statistics.
How much padding
It varies by route:
- Congested hub-to-hub: can be 15–30 min of padding.
- Long-haul: padding compensates for variable headwinds.
- Short-haul to a small airport: less padding because there's less variability.
Why this matters to you
- An "on time" flight that arrives 20 minutes early still uses block time normally.
- A "delayed" flight that arrives 10 minutes late may have been pushed up against the padding edge.
- For tight connections, the predictive ETA in a tracker matters more than the airline's "On Time" status.
How modern apps handle this
FlightyFlow builds its predictive ETA from current flight data, weather, and historical patterns — often more accurate than the airline's official "estimated" time, especially in irregular operations.
#block time#padding#aviation
Track your next flight with FlightyFlow
Free on the App Store. Live aircraft, smart alerts, and beautiful flight pages — built for iPhone.