Carrier route record
UAGJT→DEN
United Airlines · Grand Junction to Denver
- 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 GJT to DEN earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 732 flights, with a median arrival 12 minutes early.
Set against the rest of the country, United's GJT to DEN record is 8 points better than the US average of 77.3%. That gap is worth roughly 77 fewer late arrivals for every thousand flights.
Key figures
On time
85.0%
Arrivals under 15 minutes late, of 728 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
0.41%
National rate is 1.89%
Whole route
79.6%
Every carrier on GJT to DEN, 2,282 flights
These figures cover 732 flights between September 2025 and August 2026. The median arrival is 12 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 GJT to DEN
United flew 732 of the 2,282 flights on GJT to DEN, about 32% of it. Its 85.0% on time is 5 points better than the route as a whole, which runs 79.6%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from United at 85.0% to SkyWest at 77.0%.
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 |
|---|---|---|---|---|---|
| United Airlines (this page) | 732 | 85.0% | 61 min | 0.41% | A+ |
| SkyWest Airlines | 1,550 | 77.0% | 80 min | 1.81% | B |
Flight by flight
United flight numbers on GJT to DEN
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Departure window
When United 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 732 flights.
- 5am–8am365 flights86.2%
- 8am–11am—
- 11am–2pm363 flights83.9%
- 2pm–5pm2 flights—
- 5pm–8pm—
- 8pm–5am2 flights—
Scale runs 75% to 90%. Rows with fewer than 30 flights show a dash.
The 5am–8am window is the strongest at 86.2% on time. The full set of windows spans 2 points.
Across the year
United on GJT to DEN through the year
Delays peak in October, when the on-time rate falls to 74.2%. March is the strongest month at 95.1%. Moving a flexible trip across that boundary buys 21 points. January was the busiest month here, with 62 flights.
Across the week, Wednesday is the strongest day at 89.4% on time and Saturday the weakest at 77.5%, a spread of 12 points.
Arrival by arrival
How late United on GJT to DEN runs when it is late
United on GJT to DEN often beats the schedule: 306 of 728 completed flights, 42%, arrived 15 minutes or more early. The 109 late arrivals split 45 under half an hour, 37 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early306 flights42.0%
- Within 15 min313 flights43.0%
- 15–29 min late45 flights6.2%
- 30–59 min late37 flights5.1%
- 1–2 hours late14 flights1.9%
- 2+ hours late13 flights1.8%
Scale runs 0% to 100%.
Share of 728 completed flights by arrival against schedule.
15 of 73 late departures made up the time and arrived on time, 21% of them. In the other direction, 51 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at DEN.
The worst days
Worst days for United on GJT to DEN
The latest arrival of the period was on 16 February 2026, 7 hours 3 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across February, April, October and December, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 16 February 2026 | 7 hours 3 minutes | Late-arriving aircraft |
| 3 April 2026 | 6 hours 35 minutes | Carrier |
| 31 October 2025 | 6 hours 17 minutes | Carrier |
| 19 December 2025 | 5 hours 30 minutes | Late-arriving aircraft |
| 17 February 2026 | 5 hours 6 minutes | National Airspace System |
Delay causes
Why United 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 6,619 reported delay minutes.
- 34%National Airspace System
- 33%Carrier
- 31%Late-arriving aircraft
- 3%Extreme weather
34% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 2,220 minutes out of 6,619, against a national NAS share of 21%. The split is drawn from 6,619 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 86.2% on time here.
Cancellations are rare at 0.41%, 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
Badly late arrivals are rare here: only 3.7% 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.
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 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 77.8% on time across 732 flights, 7 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 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 GJT to DEN
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 85.0% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 728 completed flights over 12 months sit behind that.
Related
Where to go next
- GJT to DEN, every carrier
- United on DEN to GJT, the return leg
- SkyWest Airlines on GJT to DEN77.0%
- United Airlines network-wide record
- Denver International (DEN) delay statistics
- Worst months to fly in the US, ranked by the data
- Late aircraft, weather, or the airline: what actually causes US flight delays
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.