Carrier route record
UADEN→JAC
United Airlines · Denver to Jackson
- Flights
- 1,162
- Period
- September 2025 to August 2026
- Share of route
- 71%
- 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 JAC lands a B+, about a point better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 1,162 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 JAC from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
78.6%
Arrivals under 15 minutes late, of 1,149 completed flights
Avg delay
60 min
Across delayed arrivals only, not all flights
Cancelled
0.60%
National rate is 1.89%
Whole route
82.4%
Every carrier on DEN to JAC, 1,632 flights
These figures cover 1,162 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 JAC
United flew 1,162 of the 1,632 flights on DEN to JAC, most of the route. Its 78.6% on time is 4 points worse than the route as a whole, which runs 82.4%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from SkyWest at 92.3% to United at 78.6%.
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 | 470 | 92.3% | 43 min | 2.34% | A |
| United Airlines (this page) | 1,162 | 78.6% | 60 min | 0.60% | B+ |
Flight by flight
United flight numbers on DEN to JAC
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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 17 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am34 flights91.2%
- 11am–2pm519 flights82.1%
- 2pm–5pm246 flights75.7%
- 5pm–8pm363 flights74.3%
- 8pm–5am—
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 91.2% of the time, against 74.3% for the evening window. That is 17 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 11am–2pm window is the busiest, with 519 flights scheduled in it.
Across the year
United on DEN to JAC through the year
December is the weak month at 63.8% on time, against 93.1% in November. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. July was the busiest month here, with 144 flights.
Across the week, Monday is the strongest day at 81.9% on time and Sunday the weakest at 73.2%, a spread of 9 points.
Arrival by arrival
How late United on DEN to JAC runs when it is late
The 246 late arrivals split 90 under half an hour, 74 between 30 and 60 minutes, and 82 an hour or more.
- 15+ min early188 flights16.4%
- Within 15 min715 flights62.2%
- 15–29 min late90 flights7.8%
- 30–59 min late74 flights6.4%
- 1–2 hours late56 flights4.9%
- 2+ hours late26 flights2.3%
Scale runs 0% to 100%.
Share of 1,149 completed flights by arrival against schedule.
28 of 219 late departures made up the time and arrived on time, 13% of them. 55 flights left on time and still arrived late.
The worst days
Worst days for United on DEN to JAC
The latest arrival of the period was on 26 December 2025, 9 hours behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 26 December 2025 | 9 hours | Late-arriving aircraft |
| 12 August 2026 | 6 hours 9 minutes | Late-arriving aircraft |
| 29 July 2026 | 5 hours 31 minutes | Carrier |
| 9 July 2026 | 4 hours 20 minutes | Late-arriving aircraft |
| 22 August 2026 | 3 hours 44 minutes | Late-arriving aircraft |
Delay causes
Why United runs late on this route
Late-arriving aircraft accounts for 49% of the 15,000 delay minutes carriers reported here, and the remaining four split what is left.
- 49%Late-arriving aircraft
- 32%Carrier
- 16%National Airspace System
- 3%Extreme weather
49% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 15,000 reported delay minutes here, that single category outweighs weather by 17 to one. The split is drawn from 14,865 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 91.2% on time here.
Cancellations are rare at 0.60%, 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
7.1% 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 406 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 8am–11am window matters as much as it does.
The return leg runs 76.9% on time across 1,161 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 1,162 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking United on DEN to JAC
Put together: the calendar is the biggest lever here, not the carrier or the hour. November runs 93.1% on time and December 63.8%, a swing of 29 points. If the dates move at all, move them out of December before you think about anything else. 1,149 completed flights over 12 months sit behind that.
Related
Where to go next
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.