Flight number record
UA 586
United Airlines · Denver to Kansas City
- Route
- DEN → MCI
- Departs
- 13:40
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 586, check with United Airlines.
UA 586 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 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 55 minutes. That rests on 363 flights, with a median arrival 8 minutes early.
Set against the rest of the country, UA 586's record is 10 points better than the US average of 77.3%. That gap is worth roughly 97 fewer late arrivals for every thousand flights.
Key figures
On time
87.0%
Arrivals under 15 minutes late, of 362 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
0.28%
National rate is 1.89%
1 hour+ late
4.7%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 2026. The median arrival is 8 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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Schedule
When UA 586 flies
UA 586 flies DEN to MCI without a single fixed slot. Its most common scheduled departure was 13:40, used on 126 of 363 flights, with 13:30 (67 flights) and 13:31 (64 flights) next.
- Departs 13:40126 flights34.7%
- Departs 13:3067 flights18.5%
- Departs 13:3164 flights17.6%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 13:40 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and UA 586 runs 9 points better at 87.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
UA 586 next to DEN to MCI
Every carrier on DEN to MCI combined arrived on time 76.5% of the time across 4,364 flights, so UA 586 is 11 points ahead of it. United flew 1,296 flights on the same city pair under all its flight numbers, including this one, and those ran 79.5% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 586thin sample | 363 | 87.0% | 53 min | 0.28% | A+ |
| All United Airlines on DEN–MCI | 1,296 | 79.5% | 70 min | 0.31% | B+ |
| All carriers on DEN–MCI | 4,364 | 76.5% | 62 min | 0.41% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 586 quarter by quarter
Quarter by quarter UA 586 held fairly steady: 86.7% in Jul–Sep 2025, 88.9% in Oct–Dec 2025, 83.3% in Jan–Mar 2026, 89.0% in Apr–Jun 2026 and 86.9% in Jul–Sep 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 202530 flights86.7%
- Oct–Dec 202591 flights88.9%
- Jan–Mar 202690 flights83.3%
- Apr–Jun 202691 flights89.0%
- Jul–Sep 202661 flights86.9%
Scale runs 75% to 95%.
By weekday, UA 586 ranged from 82.7% on Friday to 92.5% on Monday. 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.
Arrival by arrival
How late UA 586 runs when it is late
Most of the lateness is short. 24 of the 47 late arrivals were under half an hour behind, and 17 reached an hour or more.
- 15+ min early67 flights18.5%
- Within 15 min248 flights68.5%
- 15–29 min late24 flights6.6%
- 30–59 min late6 flights1.7%
- 1–2 hours late13 flights3.6%
- 2+ hours late4 flights1.1%
Scale runs 0% to 100%.
Share of 362 completed flights by arrival against schedule.
7 of 35 late departures made up the time and arrived on time, 20% of them. In the other direction, 19 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 MCI.
The worst days
Worst days for UA 586
The latest arrival of the period was on 19 December 2025, 3 hours 26 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 December 2025 | 3 hours 26 minutes | Carrier |
| 1 June 2026 | 3 hours 18 minutes | Late-arriving aircraft |
| 20 November 2025 | 2 hours 17 minutes | Carrier |
| 23 August 2026 | 2 hours 1 minute | Late-arriving aircraft |
| 11 January 2026 | 1 hour 45 minutes | Carrier |
Delay causes
Why UA 586 runs late
Late-arriving aircraft accounts for 44% of the 2,494 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Late-arriving aircraft
- 38%Carrier
- 17%National Airspace System
- 1%Extreme weather
44% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,494 reported delay minutes here, that single category outweighs weather by 35 to one. The split is drawn from 2,494 delay minutes reported on UA 586.
Cancellations are rare at 0.28%, 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 routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.7% 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.
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.
The same number turns up on six other city pairs in the data, including LGA to DEN (124), SJC to DEN (82) and ORD to LGA (70), 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. 363 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: 87.0% on time and 0.28% 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.