Great Falls International in June 2026

87.1%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 June 2026, reporting carriers scheduled 171 domestic departures from Great Falls International (GTF). 87.1% left less than 15 minutes late and 87.7% reached their destination on time; 0.0% were cancelled.

Nationally that month, 72.2% of flights departed on time and 72.8% arrived on time, so GTF departures were 14.9 points above the national departure figure.

A year earlier, in June 2025, the airport had 213 departures with 86.4% leaving on time: a change of +0.7 points, with flights down 20%.

Flights arriving at GTF that month were on time 81.3% of the time (171 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 59%, national aviation system 23% and air carrier 16%.

On time 87.7%
Arrived 15+ minutes late 12.3%
Cancelled 0.0%
Diverted 0.0%

Every scheduled departure from GTF in June 2026, judged by arrival at the destination.

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

Measure	Jun 2026	Jun 2025	GTF, 12 months to Jul 2026	All reported flights, Jun 2026
Departed on time	87.1%	86.4%	88.2%	72.2%
Arrived on time	87.7%	86.4%	87.7%	72.8%
Cancelled	0.0%	0.0%	0.8%	1.6%
Average departure delay (late minutes only)	11.1 min	14.4 min	10.6 min	20.6 min
Scheduled departures a day	6	7	6	20,253
Scheduled departures	171	213	2,168	607,577

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	94	55%	97.9%	-16.2 min	0.0%
UA United Airlines	60	35%	73.3%	18.1 min	0.0%
G4 Allegiant Air	17	10%	82.4%	-6.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
GTF–SLC	Great Falls to Salt Lake City	90	98.9%	-16.5 min	0.0%
GTF–DEN	Great Falls to Denver	60	73.3%	18.1 min	0.0%
GTF–LAS	Great Falls to Las Vegas	9	100.0%	-21.3 min	0.0%
GTF–AZA	Great Falls to Phoenix	8	62.5%	11.3 min	0.0%
GTF–ORD	Great Falls to Chicago	4	75.0%	-9.5 min	0.0%

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), June 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Jun 2026	Minutes
Air carrier	16.2%	30.8%	292
Late-arriving aircraft	58.5%	42.1%	1,053
National Aviation System	22.7%	20.3%	408
Extreme weather	2.6%	6.7%	46
Security	0.0%	0.1%	0

1,799 delay minutes on 21 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 GTF on time in June 2026?

87.1% of 171 scheduled domestic departures left less than 15 minutes late, and 87.7% reached their destination on time. The national figures that month were 72.2% and 72.8%.

How does that compare with a year earlier?

In June 2025, 86.4% of 213 departures left on time and 0.0% were cancelled, against 87.1% and 0.0% in June 2026.

Provenance

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