Flight number record
UA 1584
United Airlines · Eagle to Denver
- Route
- EGE → DEN
- Departs
- 07:05
- Flights
- 270
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1584, check with United Airlines.
UA 1584 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 9 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 270 flights, with a median arrival 13 minutes early.
Set against the rest of the country, UA 1584's record is 9 points better than the US average of 77.3%. That gap is worth roughly 86 fewer late arrivals for every thousand flights.
Key figures
On time
85.9%
Arrivals under 15 minutes late, of 270 completed flights
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
4.4%
National rate is 8.3%
These figures cover 270 flights between September 2025 and August 2026. The median arrival is 13 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 1584 flies
UA 1584 flies EGE to DEN without a single fixed slot. Its most common scheduled departure was 07:05, used on 156 of 270 flights, with 07:10 (63 flights) and 07:00 (37 flights) next.
- Departs 07:05156 flights57.8%
- Departs 07:1063 flights23.3%
- Departs 07:0037 flights13.7%
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 07:05 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and UA 1584 runs 3 points worse at 85.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
UA 1584 next to EGE to DEN
Every carrier on EGE to DEN combined arrived on time 79.3% of the time across 1,171 flights, so UA 1584 is 7 points ahead of it. United flew 954 flights on the same city pair under all its flight numbers, including this one, and those ran 80.4% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1584thin sample | 270 | 85.9% | 67 min | 0.00% | A+ |
| All United Airlines on EGE–DEN | 954 | 80.4% | 84 min | 0.31% | B+ |
| All carriers on EGE–DEN | 1,171 | 79.3% | 77 min | 0.43% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1584 quarter by quarter
UA 1584 did not run the same all year. Its best quarter was Jan–Mar 2026 at 92.2% on time and its weakest Jul–Sep 2026 at 77.4%, a swing of 15 points on roughly 68 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Oct–Dec 202553 flights88.7%
- Jan–Mar 202664 flights92.2%
- Apr–Jun 202691 flights85.7%
- Jul–Sep 202662 flights77.4%
Scale runs 70% to 100%.
By weekday, UA 1584 did best on Monday at 94.9% on time and worst on Friday at 78.9%. Each day rests on about 39 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1584 runs when it is late
UA 1584 often beats the schedule: 127 of 270 completed flights, 47%, arrived 15 minutes or more early. Most of the lateness is short. 19 of the 38 late arrivals were under half an hour behind, and 12 reached an hour or more.
- 15+ min early127 flights47.0%
- Within 15 min105 flights38.9%
- 15–29 min late19 flights7.0%
- 30–59 min late7 flights2.6%
- 1–2 hours late5 flights1.9%
- 2+ hours late7 flights2.6%
Scale runs 0% to 100%.
Share of 270 completed flights by arrival against schedule.
4 of 21 late departures made up the time and arrived on time, 19% of them. In the other direction, 21 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 UA 1584
The latest arrival of the period was on 17 April 2026, 5 hours 23 minutes behind schedule; most of its delay minutes were filed as extreme weather. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 April 2026 | 5 hours 23 minutes | Extreme weather |
| 1 May 2026 | 4 hours 20 minutes | Carrier |
| 6 March 2026 | 4 hours 1 minute | Extreme weather |
| 3 April 2026 | 3 hours 4 minutes | National Airspace System |
| 5 May 2026 | 2 hours 46 minutes | Extreme weather |
Delay causes
Why UA 1584 runs late
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 2,554 reported delay minutes.
- 41%National Airspace System
- 32%Carrier
- 23%Extreme weather
- 4%Late-arriving aircraft
Extreme weather accounts for 23% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 3.8 times the usual weather exposure. The split is drawn from 2,554 delay minutes reported on UA 1584.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are 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 4.4% 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 same number turns up on six other city pairs in the data, including ORD to LAX (55), DEN to TUS (32) and DEN to PBI (21), but none flew often enough under UA 1584 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to EGE to DEN only.
One caution: this is a thin sample. 270 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 1584
For a booking, UA 1584 has one of the better records a US domestic flight can show: 85.9% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- EGE to DEN, every carrier and departure
- DEN to EGE, the return direction
- United Airlines 2663 on the same route81.1%
- Denver International (DEN) 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
- Worst months to fly in the US, ranked by the data
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.