Carrier route record
UADEN→GJT
United Airlines · Denver to Grand Junction
- Flights
- 732
- Period
- September 2025 to August 2026
- Share of route
- 32%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with United Airlines.
United on DEN to GJT lands a B+, level with the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 732 flights, with a median arrival 4 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate United on DEN to GJT from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
77.8%
Arrivals under 15 minutes late, of 730 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
0.14%
National rate is 1.89%
Whole route
79.9%
Every carrier on DEN to GJT, 2,282 flights
These figures cover 732 flights between September 2025 and August 2026. The median arrival is 4 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
United against every carrier on DEN to GJT
United flew 732 of the 2,282 flights on DEN to GJT, about 32% of it. Its 77.8% on time is 2 points worse than the route as a whole, which runs 79.9%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from SkyWest at 80.9% to United at 77.8%.
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 | 1,550 | 80.9% | 70 min | 1.87% | B |
| United Airlines (this page) | 732 | 77.8% | 63 min | 0.14% | B+ |
Flight by flight
United flight numbers on DEN to GJT
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Departure window
When United runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 22 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am—
- 11am–2pm367 flights86.9%
- 2pm–5pm—
- 5pm–8pm331 flights69.1%
- 8pm–5am34 flights64.7%
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 64.7% on time, against 86.9% for the 11am–2pm slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 11am–2pm window is the busiest, with 367 flights scheduled in it.
Across the year
United on DEN to GJT through the year
August is the worst month at 63.9% on time, 26 points below January, the best at 90.3%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. January was the busiest month here, with 62 flights.
Across the week, Wednesday is the strongest day at 80.8% on time and Sunday the weakest at 72.6%, a spread of 8 points.
Arrival by arrival
How late United on DEN to GJT runs when it is late
The 162 late arrivals split 51 under half an hour, 56 between 30 and 60 minutes, and 55 an hour or more.
- 15+ min early104 flights14.2%
- Within 15 min464 flights63.6%
- 15–29 min late51 flights7.0%
- 30–59 min late56 flights7.7%
- 1–2 hours late35 flights4.8%
- 2+ hours late20 flights2.7%
Scale runs 0% to 100%.
Share of 730 completed flights by arrival against schedule.
21 of 151 late departures made up the time and arrived on time, 14% of them. 32 flights left on time and still arrived late.
The worst days
Worst days for United on DEN to GJT
The latest arrival of the period was on 19 December 2025, 5 hours 40 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On four of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 December 2025 | 5 hours 40 minutes | Carrier |
| 21 August 2026 | 5 hours 39 minutes | Late-arriving aircraft |
| 23 August 2026 | 3 hours 52 minutes | Late-arriving aircraft |
| 26 July 2026 | 3 hours 46 minutes | Late-arriving aircraft |
| 17 June 2026 | 3 hours 43 minutes | Late-arriving aircraft |
Delay causes
Why United runs late on this route
Late-arriving aircraft accounts for 62% of the 10,000 delay minutes carriers reported here, and the remaining four split what is left.
- 62%Late-arriving aircraft
- 26%Carrier
- 12%National Airspace System
- 0%Extreme weather
62% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 10,000 reported delay minutes here, that single category outweighs weather by 62 to one. The split is drawn from 10,181 reported delay minutes.
Cancellations are rare at 0.14%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
7.5% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
At 212 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 11am–2pm window matters as much as it does.
The return leg is a different operation and performs like one: it runs 85.0% on time across 732 flights, 7 points above 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 7 points of difference.
One caution: this is a thin sample. 732 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 United on DEN to GJT
Put together: treat all of this as provisional. 732 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 77.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 730 completed flights over 12 months sit behind that.
Related
Where to go next
- DEN to GJT, every carrier
- United on GJT to DEN, the return leg
- SkyWest Airlines on DEN to GJT80.9%
- United Airlines network-wide record
- Denver International (DEN) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
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.