Flight number record
UA 586
United Airlines · Denver to Kansas City
- Route
- DEN → MCI
- Departs
- 13:30
- Flights
- 364
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 586, check with United Airlines.
UA 586 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 77.6%. When something does go wrong the average delay runs about an hour. That rests on 364 flights, with a median arrival 6 minutes early.
Set against the rest of the country, UA 586's record is 8 points better than the US average of 77.6%. That gap is worth roughly 84 fewer late arrivals for every thousand flights.
Key figures
On time
86.0%
Arrivals under 15 minutes late, of 363 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
0.27%
National rate is 1.81%
1 hour+ late
5.0%
National rate is 8.1%
These figures cover 364 flights between July 2025 and June 2026. The median arrival is 6 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.
Schedule
When UA 586 flies
UA 586 flies DEN to MCI without a single fixed slot. Its most common scheduled departure was 13:30, used on 129 of 364 flights, with 13:40 (86 flights) and 13:31 (64 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 13:30129 flights35.4%
- Departs 13:4086 flights23.6%
- Departs 13:3164 flights17.6%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 13:30 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and UA 586 runs 7 points better at 86.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
UA 586 next to DEN to MCI
Every carrier on DEN to MCI combined arrived on time 75.5% of the time across 4,269 flights, so UA 586 is 11 points ahead of it. United flew 1,297 flights on the same city pair under all its flight numbers, including this one, and those ran 78.2% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 586thin sample | 364 | 86.0% | 58 min | 0.27% | A+ |
| All United Airlines on DEN–MCI | 1,297 | 78.2% | 66 min | 0.39% | B+ |
| All carriers on DEN–MCI | 4,269 | 75.5% | 60 min | 0.40% | B+ |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 586 quarter by quarter
Quarter by quarter UA 586 held fairly steady: 82.6% in Jul–Sep 2025, 88.9% in Oct–Dec 2025, 83.3% in Jan–Mar 2026 and 89.0% in Apr–Jun 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202592 flights82.6%
- Oct–Dec 202591 flights88.9%
- Jan–Mar 202690 flights83.3%
- Apr–Jun 202691 flights89.0%
Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, UA 586 ranged from 82.4% on Thursday to 92.2% on Saturday. With about 52 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Delay causes
Why UA 586 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 43% of the 2,933 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 43%Late-arriving aircraft
- 39%Carrier
- 17%National Airspace System
- 1%Extreme weather
43% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 2,933 reported delay minutes here, that single category outweighs weather by 39 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 2,933 delay minutes reported on UA 586.
Cancellations are rare at 0.27%, below the national 1.81% 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 routes
What a delay on this flight costs
5.0% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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.
The 533 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The same number turns up on six other city pairs in the data, including LGA to DEN (137), ORD to LGA (83) and SJC to DEN (41), but none flew often enough under UA 586 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to MCI only.
One caution: this is a thin sample. 364 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 UA 586
For a booking, UA 586 has one of the better records a US domestic flight can show: 86.0% on time and 0.27% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- DEN to MCI, every carrier and departure
- MCI to DEN, the return direction
- United Airlines 2159 on the same route87.9%
- Denver International (DEN) delay statistics
- Kansas City International (MCI) delay statistics
- United Airlines on-time record
- Every United Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means United Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.