Airport reliability

Great Falls (GTF) on-time performance

How reliably flights leave Great Falls, MT (GTF) and reach their destinations, by airline, departure hour and month, September 2025 to August 2026.

Historical performance Official DOT data through August 2026 · Not live flight status

Great Falls, MT2,123 departures in 12 months

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Departures on time: 87.8%
Cancelled: 0.8%
60+ minutes late: 4.2%
Scheduled departures: 2,123

What this means

GTF departures beat the U.S. average.

87.8% of the 2,123 scheduled departures from Great Falls (GTF) arrived at their destination on time, 12.2 points higher than the U.S. average of 75.6%.
0.8% of departures were cancelled (U.S. average 1.9%), and 4.2% arrived an hour or more late.
Flights arriving at GTF were on time 85.7% of the time.
Among airlines with at least 300 departures, SkyWest Airlines was the most punctual from GTF (90.5%) and United Airlines the least (83.3%).
Over the last 3 years, September was the most reliable month for departures from GTF (91.4% on time) and February the least reliable (79.6%).
Flights scheduled to depart before 6 am were the most punctual (96.7% on time); flights scheduled to depart 2 pm to 3 pm were the least (79.7%).

Airlines at GTF

Ranked by on-time arrival

Departures from GTF, September 2025 to August 2026. On time means arrived at the destination within 15 minutes of schedule.
Airline	On time	Cancelled	60+ min late	Avg delay when late	Departures
SkyWest AirlinesSold as United Express, Delta Connection, American Eagle, Alaska	90.5%	0.8%	2.6%	76 min	1,396
United Airlines	83.3%	0.8%	8.0%	120 min	527
Allegiant Air	80.0%	0.5%	6.0%	81 min	200

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On-time rate by departure hour

<6a 96.7%

6a 91.2%

7a 89.1%

10a 90.0%

11a Insufficient sample

12p Insufficient sample

1p 90.1%

2p 79.7%

3p Insufficient sample

4p 74.2%

5p 86.5%

6p 87.5%

8p Insufficient sample

9p Insufficient sample

10p Insufficient sample

Share of scheduled flights on time GTF average 87.8%

Departures from GTF by scheduled local departure hour, September 2025 to August 2026. Scale starts at zero.

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Period	On time	Flights
Departing before 6 am	96.7%	365
Departing 6 am to 7 am	91.2%	317
Departing 7 am to 8 am	89.1%	55
Departing 10 am to 11 am	90.0%	60
Departing 11 am to noon	Insufficient sample	29
Departing noon to 1 pm	Insufficient sample	22
Departing 1 pm to 2 pm	90.1%	362
Departing 2 pm to 3 pm	79.7%	364
Departing 3 pm to 4 pm	Insufficient sample	1
Departing 4 pm to 5 pm	74.2%	62
Departing 5 pm to 6 pm	86.5%	52
Departing 6 pm to 7 pm	87.5%	345
Departing 8 pm to 9 pm	Insufficient sample	11
Departing 9 pm to 10 pm	Insufficient sample	42
Departing 10 pm to 11 pm	Insufficient sample	36

Best and worst months at GTF

Jan 82.6%

Feb 79.6%

Mar 88.1%

Apr 87.8%

May 86.8%

Jun 87.5%

Jul 88.3%

Aug 87.0%

Sep 91.4%

Oct 89.8%

Nov 86.4%

Dec 90.5%

Share of scheduled flights on time 12-month average 87.8%

Departures from GTF by calendar month, September 2023 to August 2026 pooled. Scale starts at zero.

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Period	On time	Flights
January	82.6%	628
February	79.6%	592
March	88.1%	649
April	87.8%	606
May	86.8%	606
June	87.5%	575
July	88.3%	588
August	87.0%	570
September	91.4%	590
October	89.8%	596
November	86.4%	568
December	90.5%	590

Month by month, last 12 months

Sep 90.3%

Oct 88.0%

Nov 87.2%

Dec 90.9%

Jan 91.6%

Feb 85.5%

Mar 83.2%

Apr 88.6%

May 87.9%

Jun 87.7%

Jul 86.6%

Aug 84.9%

Share of scheduled flights on time U.S. average 75.6%

Departures from GTF, September 2025 to August 2026. Scale starts at zero.

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Period	On time	Flights
Sep 2025	90.3%	196
Oct 2025	88.0%	175
Nov 2025	87.2%	164
Dec 2025	90.9%	176
Jan 2026	91.6%	190
Feb 2026	85.5%	173
Mar 2026	83.2%	185
Apr 2026	88.6%	167
May 2026	87.9%	173
Jun 2026	87.7%	171
Jul 2026	86.6%	187
Aug 2026	84.9%	166

Busiest routes from GTF

Nonstop routes from GTF by scheduled flights, September 2025 to August 2026.
To	On time	Cancelled	Airlines	Flights
Salt Lake City (SLC)	91.9%	0.7%	1	1,072
Denver (DEN)	85.3%	0.8%	2	728
Las Vegas (LAS)	86.0%	0.9%	1	107
Seattle (SEA)	78.7%	1.1%	1	94
Phoenix (AZA)	73.1%	0.0%	1	93

Airliner parked at a terminal gate — Photo: Depositphotos (licensed stock, illustrative only). Credits

Sources & data dates

Source: U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
Period: September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
Data through: August 2026
Processed: 2026-11-03
Scope: Scheduled nonstop domestic departures from Great Falls, MT (GTF) by airlines that report to the DOT.
Method: Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.

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