Great Falls International in December 2024

90.6%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 December 2024, reporting carriers scheduled 203 domestic departures from Great Falls International (GTF). 90.6% left less than 15 minutes late and 90.1% reached their destination on time; 0.0% were cancelled.

Nationally that month, 77.8% of flights departed on time and 78.1% arrived on time, so GTF departures were 12.8 points above the national departure figure.

A year earlier, in December 2023, the airport had 211 departures with 91.9% leaving on time: a change of −1.3 points, with flights down 4%.

Flights arriving at GTF that month were on time 86.2% of the time (203 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 44%, late-arriving aircraft 21% and air carrier 18%.

On time 90.1%
Arrived 15+ minutes late 9.4%
Cancelled 0.0%
Diverted 0.5%

Every scheduled departure from GTF in December 2024, judged by arrival at the destination.

December 2024 against a year earlier, the airport's year and the nation

Measure	Dec 2024	Dec 2023	GTF, 12 months to Jul 2026	All reported flights, Dec 2024
Departed on time	90.6%	91.9%	88.2%	77.8%
Arrived on time	90.1%	90.5%	87.7%	78.1%
Cancelled	0.0%	0.0%	0.8%	0.7%
Average departure delay (late minutes only)	11.6 min	11.0 min	10.6 min	16.6 min
Scheduled departures a day	7	7	6	19,686
Scheduled departures	203	211	2,168	590,581

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	168	83%	94.6%	-10.8 min	0.0%
G4 Allegiant Air	22	11%	59.1%	60.6 min	0.0%
UA United Airlines	13	6%	84.6%	-10.4 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
GTF–SLC	Great Falls to Salt Lake City	88	94.3%	-10.0 min	0.0%
GTF–DEN	Great Falls to Denver	62	95.2%	-13.3 min	0.0%
GTF–MSP	Great Falls to Minneapolis	31	90.3%	-7.5 min	0.0%
GTF–LAS	Great Falls to Las Vegas	13	69.2%	72.9 min	0.0%
GTF–AZA	Great Falls to Phoenix	9	44.4%	42.8 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), December 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2024	Minutes
Air carrier	18.1%	34.3%	407
Late-arriving aircraft	20.8%	40.2%	467
National Aviation System	43.6%	17.8%	979
Extreme weather	17.5%	7.5%	393
Security	0.0%	0.2%	0

2,246 delay minutes on 19 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 December 2024?

90.6% of 203 scheduled domestic departures left less than 15 minutes late, and 90.1% reached their destination on time. The national figures that month were 77.8% and 78.1%.

How does that compare with a year earlier?

In December 2023, 91.9% of 211 departures left on time and 0.0% were cancelled, against 90.6% and 0.0% in December 2024.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for December 2024; 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.