Great Falls International in June 2025

86.4%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 2025, reporting carriers scheduled 213 domestic departures from Great Falls International (GTF). 86.4% left less than 15 minutes late and 86.4% reached their destination on time; 0.0% were cancelled.

Nationally that month, 71.4% of flights departed on time and 70.3% arrived on time, so GTF departures were 15.0 points above the national departure figure.

A year earlier, in June 2024, the airport had 191 departures with 90.1% leaving on time: a change of −3.7 points, with flights up 12%.

Flights arriving at GTF that month were on time 83.1% of the time (213 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 45%, air carrier 24% and extreme weather 19%.

On time 86.4%
Arrived 15+ minutes late 13.6%
Cancelled 0.0%
Diverted 0.0%

Every scheduled departure from GTF in June 2025, judged by arrival at the destination.

June 2025 against a year earlier, the airport's year and the nation

Measure	Jun 2025	Jun 2024	GTF, 12 months to Jul 2026	All reported flights, Jun 2025
Departed on time	86.4%	90.1%	88.2%	71.4%
Arrived on time	86.4%	88.5%	87.7%	70.3%
Cancelled	0.0%	0.5%	0.8%	1.6%
Average departure delay (late minutes only)	14.4 min	8.7 min	10.6 min	22.1 min
Scheduled departures a day	7	6	6	20,386
Scheduled departures	213	191	2,168	611,575

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	135	63%	93.3%	-5.6 min	0.0%
UA United Airlines	60	28%	71.7%	24.0 min	0.0%
G4 Allegiant Air	18	8%	83.3%	1.6 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%	-10.9 min	0.0%
GTF–DEN	Great Falls to Denver	60	71.7%	24.0 min	0.0%
GTF–MSP	Great Falls to Minneapolis	30	83.3%	0.3 min	0.0%
GTF–SEA	Great Falls to Seattle	11	81.8%	20.1 min	0.0%
GTF–AZA	Great Falls to Phoenix	9	77.8%	4.7 min	0.0%
GTF–LAS	Great Falls to Las Vegas	9	88.9%	-1.4 min	0.0%
GTF–ORD	Great Falls to Chicago	4	75.0%	-0.2 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 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jun 2025	Minutes
Air carrier	23.8%	31.6%	690
Late-arriving aircraft	12.5%	40.6%	364
National Aviation System	44.6%	20.9%	1,295
Extreme weather	19.1%	6.9%	553
Security	0.0%	0.2%	0

2,902 delay minutes on 29 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 2025?

86.4% of 213 scheduled domestic departures left less than 15 minutes late, and 86.4% reached their destination on time. The national figures that month were 71.4% and 70.3%.

How does that compare with a year earlier?

In June 2024, 90.1% of 191 departures left on time and 0.5% were cancelled, against 86.4% and 0.0% in June 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for June 2025; 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.