Flight number record
UA 2859
United Airlines · Denver to Eagle
- Route
- DEN → EGE
- Departs
- 19:35
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2859, check with United Airlines.
UA 2859 sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 363 flights, with a median arrival 1 minute late.
The national on-time rate over the same period is 77.3%, so UA 2859 runs 7 points behind the country as a whole. Across a thousand flights that is about 67 extra late arrivals.
Key figures
On time
70.6%
Arrivals under 15 minutes late, of 361 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
0.28%
National rate is 1.89%
1 hour+ late
12.2%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 2026. Beyond the headline rate, 12.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 2859 flies
UA 2859 flies DEN to EGE without a single fixed slot. Its most common scheduled departure was 19:35, used on 81 of 363 flights, with 19:40 (50 flights) and 19:50 (39 flights) next.
- Departs 19:3581 flights22.3%
- Departs 19:4050 flights13.8%
- Departs 19:5039 flights10.7%
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 19:35 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and UA 2859 runs 3 points better at 70.6%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
UA 2859 next to DEN to EGE
Every carrier on DEN to EGE combined arrived on time 79.2% of the time across 1,171 flights, so UA 2859 is 9 points behind it. United flew 954 flights on the same city pair under all its flight numbers, including this one, and those ran 77.8% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2859thin sample | 363 | 70.6% | 75 min | 0.28% | C+ |
| All United Airlines on DEN–EGE | 954 | 77.8% | 62 min | 0.21% | B+ |
| All carriers on DEN–EGE | 1,171 | 79.2% | 60 min | 0.34% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2859 quarter by quarter
UA 2859 did not run the same all year. Its best quarter was Jan–Mar 2026 at 78.7% on time and its weakest Jul–Sep 2026 at 51.7%, a swing of 27 points on roughly 73 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.
- Jul–Sep 202530 flights70.0%
- Oct–Dec 202591 flights74.7%
- Jan–Mar 202690 flights78.7%
- Apr–Jun 202691 flights71.4%
- Jul–Sep 202661 flights51.7%
Scale runs 45% to 85%.
By weekday, UA 2859 did best on Tuesday at 76.5% on time and worst on Thursday at 60.8%. Each day rests on about 52 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2859 runs when it is late
The 106 late arrivals split 33 under half an hour, 29 between 30 and 60 minutes, and 44 an hour or more.
- 15+ min early27 flights7.5%
- Within 15 min228 flights63.2%
- 15–29 min late33 flights9.1%
- 30–59 min late29 flights8.0%
- 1–2 hours late29 flights8.0%
- 2+ hours late15 flights4.2%
Scale runs 0% to 100%.
Share of 361 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 105 departures that left 15 minutes late or more, only 12 made it up before arrival. 13 flights left on time and still arrived late.
The worst days
Worst days for UA 2859
The latest arrival of the period was on 7 July 2026, 11 hours 47 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. Three of the five worst days fell in August 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 July 2026 | 11 hours 47 minutes | National Airspace System |
| 14 August 2026 | 5 hours 13 minutes | Late-arriving aircraft |
| 29 July 2026 | 5 hours | Carrier |
| 13 August 2026 | 4 hours 17 minutes | Late-arriving aircraft |
| 24 August 2026 | 4 hours 13 minutes | Late-arriving aircraft |
Delay causes
Why UA 2859 runs late
Late-arriving aircraft accounts for 55% of the 7,897 delay minutes carriers reported here, and the remaining four split what is left.
- 55%Late-arriving aircraft
- 26%Carrier
- 16%National Airspace System
- 3%Extreme weather
55% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,897 reported delay minutes here, that single category outweighs weather by 21 to one. The split is drawn from 7,897 delay minutes reported on UA 2859.
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
12.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The same number turns up on three other city pairs in the data, including JAX to DEN (21), RDU to ORD (16) and ORD to DEN (16), but none flew often enough under UA 2859 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to EGE 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 2859
For a booking, UA 2859 is a flight to put a long connection behind. 12.2% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- DEN to EGE, every carrier and departure
- EGE to DEN, the return direction
- United Airlines 1378 on the same route81.0%
- 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
- 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.