Flight number record
UA 2146
United Airlines · Los Angeles to Denver
- Route
- LAX → DEN
- Departs
- 16:10
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2146, check with United Airlines.
UA 2146 lands a B+, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 364 flights, with a median arrival 2 minutes early.
Key figures
On time
77.4%
Arrivals under 15 minutes late, of 363 completed flights
Avg delay
68 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
8.8%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. Beyond the headline rate, 8.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 2146 flies
UA 2146 flies LAX to DEN without a single fixed slot. Its most common scheduled departure was 16:10, used on 219 of 364 flights, with 16:13 (80 flights) and 16:15 (65 flights) next.
- Departs 16:10219 flights60.2%
- Departs 16:1380 flights22.0%
- Departs 16:1565 flights17.9%
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 16:10 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 2146 runs 6 points better at 77.4%. 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 2146 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 2146 is 4 points behind 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%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2146thin sample | 364 | 77.4% | 68 min | 0.00% | B+ |
| 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 2146 quarter by quarter
UA 2146 did not run the same all year. Its best quarter was Apr–Jun 2026 at 85.7% on time and its weakest Jul–Sep 2026 at 58.1%, a swing of 28 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 flights63.3%
- Oct–Dec 202591 flights80.0%
- Jan–Mar 202690 flights84.4%
- Apr–Jun 202691 flights85.7%
- Jul–Sep 202662 flights58.1%
Scale runs 50% to 90%.
By weekday, UA 2146 did best on Tuesday at 82.7% on time and worst on Monday at 69.8%. Each day rests on about 52 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2146 runs when it is late
The 82 late arrivals split 29 under half an hour, 21 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early53 flights14.6%
- Within 15 min228 flights62.8%
- 15–29 min late29 flights8.0%
- 30–59 min late21 flights5.8%
- 1–2 hours late21 flights5.8%
- 2+ hours late11 flights3.0%
Scale runs 0% to 100%.
Share of 363 completed flights by arrival against schedule.
13 of 78 late departures made up the time and arrived on time, 17% of them. 17 flights left on time and still arrived late.
The worst days
Worst days for UA 2146
The latest arrival of the period was on 23 August 2026, 4 hours 22 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. Four of the five worst days fell in August 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 23 August 2026 | 4 hours 22 minutes | National Airspace System |
| 22 September 2025 | 4 hours 14 minutes | National Airspace System |
| 3 August 2026 | 4 hours 14 minutes | National Airspace System |
| 14 August 2026 | 4 hours 13 minutes | National Airspace System |
| 13 August 2026 | 4 hours 11 minutes | National Airspace System |
Delay causes
Why UA 2146 runs late
National Airspace System accounts for 66% of the 5,551 delay minutes carriers reported here, and the remaining four split what is left.
- 66%National Airspace System
- 22%Late-arriving aircraft
- 12%Carrier
66% 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 3,664 minutes out of 5,551, against a national NAS share of 21%. The split is drawn from 5,551 delay minutes reported on UA 2146.
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
8.8% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
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.
Every one of the 364 flights under UA 2146 in the data flew LAX to DEN. The number was not reused on any other city pair, which makes this a clean record of one route.
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 2146
For a booking, read UA 2146 as 77.4% on time with 0.00% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- LAX to DEN, every carrier and departure
- DEN to LAX, the return direction
- Frontier Airlines 3156 on the same route89.2%
- United Airlines 1912 on the same route91.4%
- 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
- Connecting flights: how much buffer the data says you need
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.