Flight number record
UA 1013
United Airlines · Denver to Los Angeles
- Route
- DEN → LAX
- 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 1013, check with United Airlines.
UA 1013 lands a B+, 7 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by roughly 50 minutes on average. That rests on 365 flights, with a median arrival 5 minutes early.
Set against the rest of the country, UA 1013's record is 7 points better than the US average of 77.3%. That gap is worth roughly 65 fewer late arrivals for every thousand flights.
Key figures
On time
83.8%
Arrivals under 15 minutes late, of 365 completed flights
Avg delay
51 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
3.0%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 5 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 1013 flies
UA 1013 flies DEN to LAX without a single fixed slot. Its most common scheduled departure was 11:45, used on 103 of 365 flights, with 11:22 (77 flights) and 11:28 (55 flights) next.
- Departs 11:45103 flights28.2%
- Departs 11:2277 flights21.1%
- Departs 11:2855 flights15.1%
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 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 1013 runs 6 points better at 83.8%. 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 1013 next to DEN to LAX
Every carrier on DEN to LAX combined arrived on time 78.7% of the time across 7,708 flights, so UA 1013 is 5 points ahead of it. United flew 3,079 flights on the same city pair under all its flight numbers, including this one, and those ran 84.0% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1013 | 365 | 83.8% | 51 min | 0.00% | B+ |
| All United Airlines on DEN–LAX | 3,079 | 84.0% | 56 min | 0.00% | B+ |
| All carriers on DEN–LAX | 7,708 | 78.7% | 63 min | 0.53% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1013 quarter by quarter
UA 1013 did not run the same all year. Its best quarter was Jan–Mar 2026 at 91.1% on time and its weakest Apr–Jun 2026 at 76.9%, a swing of 14 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 flights83.3%
- Oct–Dec 202592 flights88.0%
- Jan–Mar 202690 flights91.1%
- Apr–Jun 202691 flights76.9%
- Jul–Sep 202662 flights77.4%
Scale runs 70% to 95%.
By weekday, UA 1013 did best on Tuesday at 90.4% on time and worst on Friday at 76.9%. Each day rests on about 52 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1013 runs when it is late
Most of the lateness is short. 30 of the 59 late arrivals were under half an hour behind, and 11 reached an hour or more.
- 15+ min early69 flights18.9%
- Within 15 min237 flights64.9%
- 15–29 min late30 flights8.2%
- 30–59 min late18 flights4.9%
- 1–2 hours late5 flights1.4%
- 2+ hours late6 flights1.6%
Scale runs 0% to 100%.
Share of 365 completed flights by arrival against schedule.
6 of 34 late departures made up the time and arrived on time, 18% of them. In the other direction, 31 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 LAX.
The worst days
Worst days for UA 1013
The latest arrival of the period was on 21 August 2026, 6 hours 46 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across August, March, December, July and June, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 August 2026 | 6 hours 46 minutes | Late-arriving aircraft |
| 6 March 2026 | 5 hours 53 minutes | Extreme weather |
| 19 December 2025 | 3 hours 1 minute | Late-arriving aircraft |
| 11 July 2026 | 2 hours 21 minutes | Carrier |
| 21 June 2026 | 2 hours 16 minutes | Carrier |
Delay causes
Why UA 1013 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 3,021 reported delay minutes.
- 39%Late-arriving aircraft
- 27%National Airspace System
- 24%Carrier
- 10%Extreme weather
39% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,021 reported delay minutes here, that single category outweighs weather by 4 to one. The split is drawn from 3,021 delay minutes reported on UA 1013.
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 3.0% 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.
Every one of the 365 flights under UA 1013 in the data flew DEN to LAX. 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. 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 1013
For a booking, read UA 1013 as 83.8% 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 LAX, every carrier and departure
- LAX to DEN, the return direction
- United Airlines 1638 on the same route91.8%
- United Airlines 405 on the same route91.2%
- United Airlines 2240 on the same route75.3%
- United Airlines 531 on the same route76.3%
- United Airlines 1195 on the same route82.5%
- Frontier Airlines 4345 on the same route74.9%
- Denver International (DEN) delay statistics
- Los Angeles International (LAX) 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.