How reliable is Robert Gray Army Air Field Airport?
Flights from GRK departed within 15 minutes of schedule in 82% of 13,394 flights in official BTS history — and weather is calmest in Aug. Here’s the full picture before you book.
Reliability score
on-time, cancellations & delays
Weather favorability
year-round climate
Origin-airport operations
What the departure punctuality at GRK looks like
On-time departures
across 13,394 flights
Source: BTS Airport Operations · data through 2026-06-25. Role-specific BTS departure history; advisory context, not a guarantee for any flight.
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Weather by month
When the weather works for you at Killeen
A calm-weather score (0–100) for each month from decades of airport observations — how often conditions disrupt flying, not temperature. Higher is calmer.
Calmest month
Calmest flying weather of the year · 98/100 favorability
Roughest month
Most disruptive — low visibility & fog, freezing conditions · 77/100 favorability
The read on GRK
What the numbers say about flying through Robert Gray Army Air Field Airport
Across official performance history, flights from Killeen left within 15 minutes of schedule about 82% of the time over 13,394 flights. That's a solid, better-than-average operational record. Pair it with an elevated cancellation rate of 3.6% — worth weighing alongside the on-time figure. When a departure does run late, the typical delay is around 10 minutes.
On weather, Killeen is an unusually calm-weather airport year-round. August is the calmest stretch for flying, scoring 98 out of 100 for favorable conditions, while January is the most disruptive at 77, driven mainly by low visibility & fog and freezing conditions. The seasonal swing is real but manageable; favor the calmer months when your dates are flexible.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to Killeen, read how we weigh it all in how the PlaneSane Score works, and brush up with how to pick a reliable flight and avoiding weather delays.
Common questions about GRK
- How reliable is Robert Gray Army Air Field Airport (GRK)?
- Flights from Killeen left within 15 minutes of schedule roughly 82% of the time across 13,394 flights of official history — a solid, better-than-average operational record. The cancellation rate runs about 3.6%. It's advisory context, not a guarantee for any single flight.
- What is the best month to fly from GRK for good weather?
- August has the calmest flying weather at Robert Gray Army Air Field Airport. January is the most disruptive, mainly from low visibility & fog and freezing conditions.
Planning a trip through Killeen?
Score real flights to and from GRK on reliability, weather, and connection safety — not just price.