Carrier route record
OOGTF→DEN
SkyWest Airlines · Great Falls to Denver
- Flights
- 201
- Period
- September 2025 to August 2026
- Share of route
- 28%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on GTF to DEN earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 14 points better than the national rate of 77.3%. When something does go wrong the average delay runs close to two hours. That rests on 201 flights, with a median arrival 21 minutes early.
Set against the rest of the country, SkyWest's GTF to DEN record is 14 points better than the US average of 77.3%. That gap is worth roughly 142 fewer late arrivals for every thousand flights.
Key figures
On time
91.5%
Arrivals under 15 minutes late, of 199 completed flights
Avg delay
121 min
Across delayed arrivals only, not all flights
Cancelled
1.00%
National rate is 1.89%
Whole route
86.1%
Every carrier on GTF to DEN, 728 flights
These figures cover 201 flights between September 2025 and August 2026. The median arrival is 21 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
SkyWest against every carrier on GTF to DEN
SkyWest flew 201 of the 728 flights on GTF to DEN, about 28% of it. Its 91.5% on time is 5 points better than the route as a whole, which runs 86.1%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from SkyWest at 91.5% to United at 84.1%.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines (this page)thin sample | 201 | 91.5% | 121 min | 1.00% | A |
| United Airlines | 527 | 84.1% | 120 min | 0.76% | B+ |
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Departure window
When SkyWest runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 201 flights.
- 5am–8am127 flights93.7%
- 8am–11am—
- 11am–2pm—
- 2pm–5pm74 flights87.7%
- 5pm–8pm—
- 8pm–5am—
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
The early departures do better, though not dramatically: 93.7% on time for the 5am–8am window against 87.7% for 2pm–5pm. Worth taking if the schedule allows, not worth an extra connection. The 5am–8am window is the busiest, with 127 flights scheduled in it.
Across the year
SkyWest on GTF to DEN through the year
- Oct–Dec 202579 flights89.9%
- Jan–Mar 2026122 flights92.5%
Scale runs 80% to 100%.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 91.5% on time across 201 flights.
Split by quarter, SkyWest on GTF to DEN logged 79 flights in Oct–Dec 2025 and 122 flights in Jan–Mar 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 91.5% annual figure is the one to use.
Across the week, Tuesday is the strongest day at 96.7% on time and Wednesday the weakest at 87.1%, a spread of 10 points.
Arrival by arrival
How late SkyWest on GTF to DEN runs when it is late
SkyWest on GTF to DEN often beats the schedule: 125 of 199 completed flights, 63%, arrived 15 minutes or more early. When SkyWest on GTF to DEN is late it tends to be very late: 9 of its 17 late arrivals were an hour or more behind, and 5 were two hours or more.
- 15+ min early125 flights62.8%
- Within 15 min57 flights28.6%
- 15–29 min late5 flights2.5%
- 30–59 min late3 flights1.5%
- 1–2 hours late4 flights2.0%
- 2+ hours late5 flights2.5%
Scale runs 0% to 100%.
Share of 199 completed flights by arrival against schedule.
Only 17 of 199 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for SkyWest on GTF to DEN
The latest arrival of the period was on 25 December 2025, 11 hours 14 minutes behind schedule; most of its delay minutes were filed as extreme weather. Three of the five worst days fell in December 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 25 December 2025 | 11 hours 14 minutes | Extreme weather |
| 20 December 2025 | 6 hours 33 minutes | Carrier |
| 3 December 2025 | 2 hours 51 minutes | Extreme weather |
| 25 February 2026 | 2 hours 20 minutes | Late-arriving aircraft |
| 6 February 2026 | 2 hours 19 minutes | Carrier |
Delay causes
Why SkyWest runs late on this route
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 2,049 reported delay minutes.
- 41%Extreme weather
- 38%Carrier
- 16%Late-arriving aircraft
- 4%National Airspace System
Extreme weather accounts for 41% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 6.9 times the usual weather exposure. The split is drawn from 2,049 reported delay minutes.
The largest share of delay minutes, 38%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 785 of the 2,049 delay minutes reported here.
Cancellations sit at 1.00% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 4.5% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 623 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg is a different operation and performs like one: it runs 85.9% on time across 201 flights, 6 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 6 points of difference.
One caution: this is a thin sample. 201 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking SkyWest on GTF to DEN
Put together: treat all of this as provisional. 201 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 91.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 199 completed flights over 12 months sit behind that.
Related
Where to go next
- GTF to DEN, every carrier
- SkyWest on DEN to GTF, the return leg
- United Airlines on GTF to DEN84.1%
- SkyWest Airlines network-wide record
- Denver International (DEN) delay statistics
- The best day of the week to fly, and why it is the second lever
- How to read this site: grades, sample sizes, and honest caveats
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.