Robert Gray AAF in May 2026

79.9%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In May 2026, reporting carriers scheduled 179 domestic departures from Robert Gray AAF (GRK). 79.9% left less than 15 minutes late and 81.6% reached their destination on time; 4.5% were cancelled.

Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so GRK departures were 2.8 points above the national departure figure.

A year earlier, in May 2025, the airport had 155 departures with 78.1% leaving on time: a change of +1.8 points, with flights up 15%.

Flights arriving at GRK that month were on time 76.0% of the time (179 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 36%, air carrier 30% and extreme weather 28%.

On time 81.6%
Arrived 15+ minutes late 14.0%
Cancelled 4.5%
Diverted 0.0%

Every scheduled departure from GRK in May 2026, judged by arrival at the destination.

May 2026 against a year earlier, the airport's year and the nation

Measure	May 2026	May 2025	GRK, 12 months to Jul 2026	All reported flights, May 2026
Departed on time	79.9%	78.1%	78.7%	77.1%
Arrived on time	81.6%	76.8%	77.2%	77.6%
Cancelled	4.5%	5.2%	4.5%	0.9%
Average departure delay (late minutes only)	12.8 min	16.0 min	14.8 min	16.0 min
Scheduled departures a day	6	5	5	20,391
Scheduled departures	179	155	1,907	611,735

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
MQ Envoy Air	115	64%	86.1%	-1.5 min	3.5%
OO SkyWest Airlines	64	36%	73.4%	10.8 min	6.3%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
GRK–DFW	Killeen to Dallas/Fort Worth	179	81.6%	2.8 min	4.5%

By scheduled departure hour

100

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), May 2026.

Delay causes

BTS cause category	Share of delay minutes	National, May 2026	Minutes
Air carrier	30.0%	33.0%	595
Late-arriving aircraft	36.0%	40.4%	714
National Aviation System	6.3%	20.5%	125
Extreme weather	27.7%	6.0%	549
Security	0.0%	0.1%	0

1,983 delay minutes on 25 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left GRK on time in May 2026?

79.9% of 179 scheduled domestic departures left less than 15 minutes late, and 81.6% reached their destination on time. The national figures that month were 77.1% and 77.6%.

How does that compare with a year earlier?

In May 2025, 78.1% of 155 departures left on time and 5.2% were cancelled, against 79.9% and 4.5% in May 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2026; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for GRK · methodology · corrections.