Robert Gray AAF (GRK) Delays and On-Time Departures
Killeen, TX · ranked 112th of 333 airports for on-time departures
Data through July 2026 · Last updated October 18, 2026
82.3% of the 1,907 flights scheduled to depart Killeen (GRK) in the last 12 months left on time, 4.8 points above the US average of 77.4%.
That ranks 112th of 333 US airports tracked on this site, with 4.5% of departures cancelled.
Envoy Air was the most punctual airline here, with 83.0% of departures on time.
December has been the best month (86% on time) and Monday the weakest day of the week (78%).
Best time of day to fly out of Killeen (GRK)
On-time departure % by scheduled departure hour (local time), last 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 93.5% | 1.6% | 582 |
| 6am–7am | 90.3% | 2.2% | 359 |
| 7am–8am | 91.3% | 4.4% | 204 |
| 8am–9am | 95.0% | 0.0% | 40 |
| 9am–10am | Limited data | 18 | |
| 10am–11am | 84.1% | 3.2% | 713 |
| 11am–12pm | 76.1% | 4.6% | 197 |
| 12pm–1pm | 72.7% | 3.4% | 472 |
| 1pm–2pm | Limited data | 13 | |
| 2pm–3pm | Limited data | 13 | |
| 3pm–4pm | 76.3% | 2.6% | 155 |
| 4pm–5pm | 68.6% | 2.7% | 298 |
| 5pm–6pm | 75.4% | 8.7% | 218 |
| 6pm–7pm | 76.7% | 3.8% | 210 |
| 7pm–8pm | 75.0% | 8.6% | 209 |
| 8pm–9pm | 57.6% | 0.0% | 33 |
Airlines at GRK ranked by on-time departures
Last 12 months. Airlines with fewer than 30 departures are marked “limited data”.
| Airline | On-time departures | On-time arrivals | Cancelled | Departures |
|---|---|---|---|---|
| Envoy Air | 83.0% | 82.1% | 4.1% | 1,307 |
| SkyWest Airlines | 80.8% | 78.8% | 5.3% | 600 |
80%+ good 70–79.9% fair <70% poor
Best day to fly out of GRK
On-time departures by day, 24 months.
Best month to fly out of GRK
On-time departures by month, 24 months.
Holiday travel at Killeen (GRK)
On-time departures during holiday periods compared with all other days, last 24 months.
| Period | On-time departures | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 84.4% | +2.2 pts | 0.0% | 77 |
| Christmas & New Year (Dec 20 - Jan 3) | 86.7% | +4.5 pts | 2.0% | 153 |
| Summer peak (Jun 15 - Aug 15) | 77.3% | -4.9 pts | 2.0% | 637 |
| All other days | 82.2% | — | 4.2% | 2,867 |
Monthly on-time departure trend at GRK
On-time departure % each month, with the 12-month US average for reference.
Routes from Killeen (GRK)
Every route from GRK with its own page, by number of flights (last 12 months, on-time arrivals).
| To | On time | Cancelled | Flights |
|---|---|---|---|
| GRK → Dallas/Fort Worth (DFW) | 81.1% | 4.5% | 1,907 |