Great Falls International in July 2026

89.3%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 July 2026, reporting carriers scheduled 187 domestic departures from Great Falls International (GTF). 89.3% left less than 15 minutes late and 86.6% reached their destination on time; 0.0% were cancelled.

Nationally that month, 68.8% of flights departed on time and 69.4% arrived on time, so GTF departures were 20.5 points above the national departure figure.

A year earlier, in July 2025, the airport had 207 departures with 89.9% leaving on time: a change of −0.6 points, with flights down 10%.

Flights arriving at GTF that month were on time 82.4% of the time (187 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 61%, national aviation system 23% and late-arriving aircraft 17%.

On time 86.6%
Arrived 15+ minutes late 12.3%
Cancelled 0.0%
Diverted 1.1%

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

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

Measure	Jul 2026	Jul 2025	GTF, 12 months to Jul 2026	All reported flights, Jul 2026
Departed on time	89.3%	89.9%	88.2%	68.8%
Arrived on time	86.6%	87.9%	87.7%	69.4%
Cancelled	0.0%	0.0%	0.8%	2.6%
Average departure delay (late minutes only)	19.0 min	9.7 min	10.6 min	24.1 min
Scheduled departures a day	6	7	6	21,066
Scheduled departures	187	207	2,168	631,970

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	108	58%	92.6%	-9.9 min	0.0%
UA United Airlines	61	33%	77.0%	38.3 min	0.0%
G4 Allegiant Air	18	10%	83.3%	2.2 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
GTF–SLC	Great Falls to Salt Lake City	92	95.7%	-10.7 min	0.0%
GTF–DEN	Great Falls to Denver	61	77.0%	38.3 min	0.0%
GTF–ORD	Great Falls to Chicago	16	75.0%	-5.5 min	0.0%
GTF–AZA	Great Falls to Phoenix	9	66.7%	21.8 min	0.0%
GTF–LAS	Great Falls to Las Vegas	9	100.0%	-17.4 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), July 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2026	Minutes
Air carrier	60.6%	31.7%	2,155
Late-arriving aircraft	16.9%	41.8%	600
National Aviation System	22.5%	19.9%	799
Extreme weather	0.0%	6.5%	0
Security	0.0%	0.1%	0

3,554 delay minutes on 23 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 July 2026?

89.3% of 187 scheduled domestic departures left less than 15 minutes late, and 86.6% reached their destination on time. The national figures that month were 68.8% and 69.4%.

How does that compare with a year earlier?

In July 2025, 89.9% of 207 departures left on time and 0.0% were cancelled, against 89.3% and 0.0% in July 2026.

Provenance

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