Of 924 sampled ZH departures, 48.1% left 15 minutes or more behind schedule. Average lateness was 26.0 minutes. Sample window: Nov 3, 2025 to Oct 31, 2026. Its published schedule has about 116 flights a week on 9 routes.
These are historical aggregates, not live status. A departure is late at 15 minutes past schedule.
| Month | Departures sampled | Late | Average lateness |
|---|---|---|---|
| Nov 2025 | 138 | 71.0% | 29.7 min |
| Apr 2026 | 25 | 48.0% | 15.5 min |
| May 2026 | 668 | 41.0% | 26.6 min |
| Sep 2026 | 23 | 60.9% | 17.8 min |
| Oct 2026 | 35 | 65.7% | 19.1 min |
| Departure airport | Departures sampled | Late | Average lateness |
|---|---|---|---|
| Shenzhen Bao'an International Airport (SZX) | 640 | 43.3% | 28.1 min |
| London Heathrow Airport (LHR) | 72 | 61.1% | 17.2 min |
| Beijing Capital International Airport (PEK) | 51 | 51.0% | 22.3 min |
| Singapore Changi Airport (SIN) | 51 | 54.9% | 22.7 min |
| Incheon International Airport (ICN) | 38 | 55.3% | 20.8 min |
| Suvarnabhumi Airport (BKK) | 27 | 77.8% | 29.9 min |
GET /flight_delays filtered by airline_iata=ZH returns the flights delayed at this moment: flight number, scheduled and actual times and minutes of delay.
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