Of 1,512 sampled 9X departures, 26.2% left 15 minutes or more behind schedule. Average lateness was 10.3 minutes. Sample window: Nov 4, 2025 to Oct 29, 2026.
These are historical aggregates, not live status. A departure is late at 15 minutes past schedule.
| Month | Departures sampled | Late | Average lateness |
|---|---|---|---|
| Nov 2025 | 182 | 26.4% | 6.2 min |
| Dec 2025 | 170 | 28.8% | 11.0 min |
| Jan 2026 | 121 | 24.8% | 14.1 min |
| Mar 2026 | 360 | 33.6% | 18.8 min |
| May 2026 | 93 | 24.7% | -8.6 min |
| Jun 2026 | 60 | 23.3% | 1.8 min |
| Jul 2026 | 155 | 21.9% | 3.2 min |
| Aug 2026 | 127 | 15.0% | 0.0 min |
| Sep 2026 | 131 | 15.3% | 4.9 min |
| Oct 2026 | 112 | 33.0% | 31.9 min |
| Departure airport | Departures sampled | Late | Average lateness |
|---|---|---|---|
| Washington Dulles International Airport (IAD) | 952 | 25.8% | 10.6 min |
| Los Angeles International Airport (LAX) | 271 | 16.6% | 1.6 min |
| Pittsburgh International Airport (PIT) | 97 | 35.1% | 21.6 min |
| Dallas Fort Worth International Airport (DFW) | 80 | 38.8% | 20.8 min |
| Phoenix Sky Harbor International Airport (PHX) | 32 | 46.9% | 34.2 min |
| Frederick W. Smith International Airport (MEM) | 28 | 50.0% | 36.7 min |
| St. Louis Lambert International Airport (STL) | 26 | 7.7% | -61.0 min |
| Nashville International Airport (BNA) | 25 | 32.0% | 29.7 min |
GET /flight_delays filtered by airline_iata=9X returns the flights delayed at this moment: flight number, scheduled and actual times and minutes of delay.
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