Flight number record
UA 1217
United Airlines · Denver to Durango
- Route
- DEN → DRO
- Departs
- 11:20
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1217, check with United Airlines.
UA 1217 earns a B+. 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 77.3%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 364 flights, with a median arrival 4 minutes early.
Set against the rest of the country, UA 1217's record is 8 points better than the US average of 77.3%. That gap is worth roughly 75 fewer late arrivals for every thousand flights.
Key figures
On time
84.8%
Arrivals under 15 minutes late, of 362 completed flights
Avg delay
48 min
Across delayed arrivals only, not all flights
Cancelled
0.27%
National rate is 1.89%
1 hour+ late
3.3%
National rate is 8.3%
These figures cover 364 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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Schedule
When UA 1217 flies
UA 1217 flies DEN to DRO without a single fixed slot. Its most common scheduled departure was 11:20, used on 84 of 364 flights, with 11:15 (82 flights) and 11:22 (45 flights) next.
- Departs 11:2084 flights23.1%
- Departs 11:1582 flights22.5%
- Departs 11:2245 flights12.4%
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 11:20 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and UA 1217 runs 7 points better at 84.8%. 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 1217 next to DEN to DRO
Every carrier on DEN to DRO combined arrived on time 80.2% of the time across 2,201 flights, so UA 1217 is 5 points ahead of it. United flew 730 flights on the same city pair under all its flight numbers, including this one, and those ran 75.3% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1217thin sample | 364 | 84.8% | 48 min | 0.27% | B+ |
| All United Airlines on DEN–DRO | 730 | 75.3% | 61 min | 0.14% | B+ |
| All carriers on DEN–DRO | 2,201 | 80.2% | 69 min | 0.95% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1217 quarter by quarter
UA 1217 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Apr–Jun 2026 at 82.4%, a swing of 11 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 flights93.3%
- Oct–Dec 202591 flights84.4%
- Jan–Mar 202690 flights85.4%
- Apr–Jun 202691 flights82.4%
- Jul–Sep 202662 flights83.9%
Scale runs 75% to 100%.
By weekday, UA 1217 ranged from 80.8% on Saturday to 86.8% on Monday. With about 52 flights behind each day, a spread of 6 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late UA 1217 runs when it is late
The 55 late arrivals split 23 under half an hour, 20 between 30 and 60 minutes, and 12 an hour or more.
- 15+ min early38 flights10.5%
- Within 15 min269 flights74.3%
- 15–29 min late23 flights6.4%
- 30–59 min late20 flights5.5%
- 1–2 hours late9 flights2.5%
- 2+ hours late3 flights0.8%
Scale runs 0% to 100%.
Share of 362 completed flights by arrival against schedule.
6 of 43 late departures made up the time and arrived on time, 14% of them. 18 flights left on time and still arrived late.
The worst days
Worst days for UA 1217
The latest arrival of the period was on 29 December 2025, 4 hours 10 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 29 December 2025 | 4 hours 10 minutes | Late-arriving aircraft |
| 24 January 2026 | 2 hours 42 minutes | Carrier |
| 22 November 2025 | 2 hours 18 minutes | Carrier |
| 17 June 2026 | 1 hour 54 minutes | Late-arriving aircraft |
| 26 December 2025 | 1 hour 49 minutes | Late-arriving aircraft |
Delay causes
Why UA 1217 runs late
Late-arriving aircraft accounts for 45% of the 2,630 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Late-arriving aircraft
- 36%Carrier
- 19%National Airspace System
45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,630 reported delay minutes here, that single category outweighs weather by 45 to one. The split is drawn from 2,630 delay minutes reported on UA 1217.
Cancellations are rare at 0.27%, 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 3.3% 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 two other city pairs in the data, including ORD to DEN (156) and SNA to DEN (44), but none flew often enough under UA 1217 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to DRO 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 1217
For a booking, read UA 1217 as 84.8% on time with 0.27% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DEN to DRO, every carrier and departure
- DRO to DEN, the return direction
- SkyWest Airlines 5224 on the same route82.7%
- SkyWest Airlines 5817 on the same route75.4%
- United Airlines 1390 on the same route62.9%
- 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.