Flight number record
UA 405
United Airlines · Denver to Los Angeles
- Route
- DEN → LAX
- Departs
- 10:02
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 405, check with United Airlines.
UA 405 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 roughly 50 minutes. That rests on 364 flights, with a median arrival 10 minutes early.
Set against the rest of the country, UA 405's record is 14 points better than the US average of 77.3%. That gap is worth roughly 139 fewer late arrivals for every thousand flights.
Key figures
On time
91.2%
Arrivals under 15 minutes late, of 364 completed flights
Avg delay
48 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
1.9%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 10 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 405 flies
UA 405 flies DEN to LAX without a single fixed slot. Its most common scheduled departure was 10:02, used on 82 of 364 flights, with 10:14 (47 flights) and 10:12 (37 flights) next.
- Departs 10:0282 flights22.5%
- Departs 10:1447 flights12.9%
- Departs 10:1237 flights10.2%
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 10:02 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and UA 405 runs 7 points better at 91.2%. 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 405 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 405 is 13 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 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 405thin sample | 364 | 91.2% | 48 min | 0.00% | A+ |
| 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 405 quarter by quarter
Quarter by quarter UA 405 held fairly steady: 96.7% in Jul–Sep 2025, 90.2% in Oct–Dec 2025, 88.8% in Jan–Mar 2026, 91.2% in Apr–Jun 2026 and 93.5% in Jul–Sep 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights96.7%
- Oct–Dec 202592 flights90.2%
- Jan–Mar 202689 flights88.8%
- Apr–Jun 202691 flights91.2%
- Jul–Sep 202662 flights93.5%
Scale runs 80% to 100%.
By weekday, UA 405 did best on Monday at 98.1% on time and worst on Sunday at 84.6%. 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 405 runs when it is late
UA 405 often beats the schedule: 133 of 364 completed flights, 37%, arrived 15 minutes or more early. The 32 late arrivals split 15 under half an hour, 10 between 30 and 60 minutes, and 7 an hour or more.
- 15+ min early133 flights36.5%
- Within 15 min199 flights54.7%
- 15–29 min late15 flights4.1%
- 30–59 min late10 flights2.7%
- 1–2 hours late5 flights1.4%
- 2+ hours late2 flights0.5%
Scale runs 0% to 100%.
Share of 364 completed flights by arrival against schedule.
A late pushback is often recovered here: of 31 departures that left 15 minutes late or more, 12 still arrived on time. 13 flights left on time and still arrived late.
The worst days
Worst days for UA 405
The latest arrival of the period was on 14 February 2026, 4 hours 15 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 |
|---|---|---|
| 14 February 2026 | 4 hours 15 minutes | Carrier |
| 1 January 2026 | 2 hours 18 minutes | National Airspace System |
| 28 December 2025 | 1 hour 35 minutes | Carrier |
| 4 June 2026 | 1 hour 26 minutes | Late-arriving aircraft |
| 24 December 2025 | 1 hour 16 minutes | Carrier |
Delay causes
Why UA 405 runs late
Carrier accounts for 46% of the 1,550 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Carrier
- 30%National Airspace System
- 24%Late-arriving aircraft
The largest share of delay minutes, 46%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 712 of the 1,550 delay minutes reported here. The split is drawn from 1,550 delay minutes reported on UA 405.
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 1.9% 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 one other city pair in the data, including ICT to ORD (1), but none flew often enough under UA 405 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to LAX only.
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 405
For a booking, UA 405 has one of the better records a US domestic flight can show: 91.2% on time and 0.00% cancelled. That is a base rate, not a promise about any single 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 1013 on the same route83.8%
- 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
- 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.