Flight number record
UA 1963
United Airlines · Denver to Salt Lake City
- Route
- DEN → SLC
- Departs
- 11:45
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1963, check with United Airlines.
UA 1963 lands a B+, 3 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by roughly 45 minutes on average. That rests on 365 flights, with a median arrival 3 minutes early.
Key figures
On time
79.9%
Arrivals under 15 minutes late, of 364 completed flights
Avg delay
46 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
4.1%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 3 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 1963 flies
UA 1963 flies DEN to SLC without a single fixed slot. Its most common scheduled departure was 11:45, used on 182 of 365 flights, with 11:50 (53 flights) and 11:40 (40 flights) next.
- Departs 11:45182 flights49.9%
- Departs 11:5053 flights14.5%
- Departs 11:4040 flights11.0%
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 11:45 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and UA 1963 runs level with that at 79.9%. 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 1963 next to DEN to SLC
Every carrier on DEN to SLC combined arrived on time 78.2% of the time across 7,713 flights, so UA 1963 is 2 points ahead of it. United flew 1,316 flights on the same city pair under all its flight numbers, including this one, and those ran 79.0% on time. Across its whole network United Airlines managed 78.8%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1963 | 365 | 79.9% | 46 min | 0.00% | B+ |
| All United Airlines on DEN–SLC | 1,316 | 79.0% | 57 min | 0.15% | B+ |
| All carriers on DEN–SLC | 7,713 | 78.2% | 61 min | 0.35% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1963 quarter by quarter
UA 1963 did not run the same all year. Its best quarter was Jul–Sep 2025 at 86.7% on time and its weakest Oct–Dec 2025 at 73.9%, a swing of 13 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 flights86.7%
- Oct–Dec 202592 flights73.9%
- Jan–Mar 202690 flights86.5%
- Apr–Jun 202691 flights75.8%
- Jul–Sep 202662 flights82.3%
Scale runs 65% to 90%.
By weekday, UA 1963 did best on Tuesday at 92.3% on time and worst on Friday at 67.3%. Each day rests on about 52 flights, so a gap of 25 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1963 runs when it is late
The 73 late arrivals split 31 under half an hour, 27 between 30 and 60 minutes, and 15 an hour or more.
- 15+ min early32 flights8.8%
- Within 15 min259 flights71.2%
- 15–29 min late31 flights8.5%
- 30–59 min late27 flights7.4%
- 1–2 hours late10 flights2.7%
- 2+ hours late5 flights1.4%
Scale runs 0% to 100%.
Share of 364 completed flights by arrival against schedule.
10 of 58 late departures made up the time and arrived on time, 17% of them. In the other direction, 25 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 SLC.
The worst days
Worst days for UA 1963
The latest arrival of the period was on 19 December 2025, 3 hours 33 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 |
|---|---|---|
| 19 December 2025 | 3 hours 33 minutes | Late-arriving aircraft |
| 28 December 2025 | 3 hours 12 minutes | Carrier |
| 11 August 2026 | 2 hours 24 minutes | Late-arriving aircraft |
| 6 March 2026 | 2 hours 20 minutes | National Airspace System |
| 6 August 2026 | 2 hours 4 minutes | Late-arriving aircraft |
Delay causes
Why UA 1963 runs late
Late-arriving aircraft accounts for 49% of the 3,384 delay minutes carriers reported here, and the remaining four split what is left.
- 49%Late-arriving aircraft
- 28%National Airspace System
- 23%Carrier
49% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,384 reported delay minutes here, that single category outweighs weather by 49 to one. The split is drawn from 3,384 delay minutes reported on UA 1963.
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 4.1% 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 five other city pairs in the data, including CLT to DEN (156), SLC to ORD (36) and IAH to DEN (31), but none flew often enough under UA 1963 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to SLC only.
One caution: this is a thin sample. 365 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 1963
For a booking, read UA 1963 as 79.9% on time with 0.00% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DEN to SLC, every carrier and departure
- SLC to DEN, the return direction
- Delta Air Lines 2663 on the same route69.1%
- Delta Air Lines 1581 on the same route91.1%
- SkyWest Airlines 5762 on the same route71.3%
- Frontier Airlines 4251 on the same route69.7%
- Delta Air Lines 2544 on the same route88.2%
- Delta Air Lines 1623 on the same route81.4%
- Denver International (DEN) delay statistics
- Salt Lake City International (SLC) 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.