Flight number record
UA 1912
United Airlines · Los Angeles to Denver
- Route
- LAX → DEN
- Departs
- 09:00
- Flights
- 349
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 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 13 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over 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 13 points better than the US average of 77.6%. That gap is worth roughly 127 fewer late arrivals for every thousand flights.
Key figures
On time
90.3%
Arrivals under 15 minutes late, of 349 completed flights
Avg delay
74 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.81%
1 hour+ late
4.6%
National rate is 8.1%
These figures cover 349 flights between July 2025 and June 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.
Schedule
When UA 1912 flies
UA 1912 flies LAX to DEN without a single fixed slot. Its most common scheduled departure was 09:00, used on 111 of 349 flights, with 08:50 (79 flights) and 08:47 (51 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 09:00111 flights31.8%
- Departs 08:5079 flights22.6%
- Departs 08:4751 flights14.6%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 09:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and UA 1912 runs 6 points better at 90.3%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Against the route
UA 1912 next to LAX to DEN
Every carrier on LAX to DEN combined arrived on time 81.7% of the time across 7,721 flights, so UA 1912 is 9 points ahead of it. United flew 3,067 flights on the same city pair under all its flight numbers, including this one, and those ran 87.1% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1912thin sample | 349 | 90.3% | 74 min | 0.00% | A+ |
| All United Airlines on LAX–DEN | 3,067 | 87.1% | 68 min | 0.10% | A+ |
| All carriers on LAX–DEN | 7,721 | 81.7% | 65 min | 0.51% | B+ |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 1912 quarter by quarter
Quarter by quarter UA 1912 held fairly steady: 89.1% in Jul–Sep 2025, 89.5% in Oct–Dec 2025, 86.7% in Jan–Mar 2026 and 95.6% in Apr–Jun 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 202592 flights89.1%
- Oct–Dec 202576 flights89.5%
- Jan–Mar 202690 flights86.7%
- Apr–Jun 202691 flights95.6%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1912 ranged from 86.0% on Saturday to 96.0% on Friday. With about 50 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Delay causes
Why UA 1912 runs late
One category carries most of the weight here. Carrier accounts for 49% of the 2,503 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 49%Carrier
- 26%National Airspace System
- 25%Late-arriving aircraft
The largest share of delay minutes, 49%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,230 of the 2,503 delay minutes reported here. The split is drawn from 2,503 delay minutes reported on UA 1912.
Cancellations are rare at 0.00%, below the national 1.81% 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 4.6% land an hour or more behind schedule, against 8.1% 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The same number turns up on two other city pairs in the data, including DEN to MCO (32) 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: 90.3% 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 route75.3%
- Frontier Airlines 3156 on the same route88.1%
- United Airlines 1339 on the same route95.7%
- United Airlines 2610 on the same route91.8%
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.