Flight number record
UA 1912
United Airlines · Los Angeles to Denver
- Route
- LAX → DEN
- Departs
- 08:47
- Flights
- 349
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1912, check with United Airlines.
UA 1912 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 14 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 349 flights, with a median arrival 12 minutes early.
Set against the rest of the country, UA 1912's record is 14 points better than the US average of 77.3%. That gap is worth roughly 141 fewer late arrivals for every thousand flights.
Key figures
On time
91.4%
Arrivals under 15 minutes late, of 349 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
3.7%
National rate is 8.3%
These figures cover 349 flights between September 2025 and August 2026. The median arrival is 12 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 1912 flies
UA 1912 flies LAX to DEN without a single fixed slot. Its most common scheduled departure was 08:47, used on 92 of 349 flights, with 08:50 (79 flights) and 08:45 (63 flights) next.
- Departs 08:4792 flights26.4%
- Departs 08:5079 flights22.6%
- Departs 08:4563 flights18.1%
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 08:47 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and UA 1912 runs 8 points better at 91.4%. 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 1912 next to LAX to DEN
Every carrier on LAX to DEN combined arrived on time 81.6% of the time across 7,709 flights, so UA 1912 is 10 points ahead of it. United flew 3,081 flights on the same city pair under all its flight numbers, including this one, and those ran 87.7% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1912thin sample | 349 | 91.4% | 66 min | 0.00% | A+ |
| All United Airlines on LAX–DEN | 3,081 | 87.7% | 69 min | 0.00% | A+ |
| All carriers on LAX–DEN | 7,709 | 81.6% | 68 min | 0.44% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1912 quarter by quarter
Quarter by quarter UA 1912 held fairly steady: 90.0% in Jul–Sep 2025, 89.5% in Oct–Dec 2025, 86.7% in Jan–Mar 2026, 95.6% in Apr–Jun 2026 and 95.2% in Jul–Sep 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights90.0%
- Oct–Dec 202576 flights89.5%
- Jan–Mar 202690 flights86.7%
- Apr–Jun 202691 flights95.6%
- Jul–Sep 202662 flights95.2%
Scale runs 80% to 100%.
By weekday, UA 1912 did best on Thursday at 96.0% on time and worst on Saturday at 82.0%. Each day rests on about 50 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1912 runs when it is late
UA 1912 often beats the schedule: 151 of 349 completed flights, 43%, arrived 15 minutes or more early. The 30 late arrivals split 11 under half an hour, 6 between 30 and 60 minutes, and 13 an hour or more.
- 15+ min early151 flights43.3%
- Within 15 min168 flights48.1%
- 15–29 min late11 flights3.2%
- 30–59 min late6 flights1.7%
- 1–2 hours late10 flights2.9%
- 2+ hours late3 flights0.9%
Scale runs 0% to 100%.
Share of 349 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 22 departures that left 15 minutes late or more, only 2 made it up before arrival. 10 flights left on time and still arrived late.
The worst days
Worst days for UA 1912
The latest arrival of the period was on 8 September 2025, 4 hours 51 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 |
|---|---|---|
| 8 September 2025 | 4 hours 51 minutes | Carrier |
| 12 March 2026 | 3 hours 31 minutes | Late-arriving aircraft |
| 17 February 2026 | 3 hours 7 minutes | National Airspace System |
| 19 April 2026 | 1 hour 52 minutes | Carrier |
| 16 November 2025 | 1 hour 45 minutes | Carrier |
Delay causes
Why UA 1912 runs late
Carrier accounts for 46% of the 1,970 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Carrier
- 33%National Airspace System
- 20%Late-arriving aircraft
33% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 656 minutes out of 1,970, against a national NAS share of 21%. The split is drawn from 1,970 delay minutes reported on UA 1912.
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 3.7% 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 862 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 three other city pairs in the data, including DEN to MCO (32), DEN to BOS (18) and DEN to IAD (16), but none flew often enough under UA 1912 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAX to DEN only.
One caution: this is a thin sample. 349 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 1912
For a booking, UA 1912 has one of the better records a US domestic flight can show: 91.4% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- LAX to DEN, every carrier and departure
- DEN to LAX, the return direction
- United Airlines 2146 on the same route77.4%
- Frontier Airlines 3156 on the same route89.2%
- United Airlines 2610 on the same route90.7%
- Los Angeles International (LAX) delay statistics
- 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.