Flight number record
UA 2240
United Airlines · Denver to Los Angeles
- Route
- DEN → LAX
- Departs
- 18:05
- Flights
- 328
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2240, check with United Airlines.
UA 2240 sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 328 flights, with a median arrival 2 minutes early.
Key figures
On time
75.3%
Arrivals under 15 minutes late, of 328 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
9.5%
National rate is 8.3%
These figures cover 328 flights between September 2025 and August 2026. Beyond the headline rate, 9.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 2240 flies
UA 2240 flies DEN to LAX without a single fixed slot. Its most common scheduled departure was 18:05, used on 77 of 328 flights, with 17:55 (55 flights) and 17:42 (51 flights) next.
- Departs 18:0577 flights23.5%
- Departs 17:5555 flights16.8%
- Departs 17:4251 flights15.5%
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 18:05 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and UA 2240 runs 7 points better at 75.3%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
UA 2240 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 2240 is 3 points behind 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 trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2240thin sample | 328 | 75.3% | 69 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 2240 quarter by quarter
UA 2240 did not run the same all year. Its best quarter was Jan–Mar 2026 at 88.9% on time and its weakest Jul–Sep 2026 at 59.7%, a swing of 29 points on roughly 66 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 flights76.7%
- Oct–Dec 202555 flights78.2%
- Jan–Mar 202690 flights88.9%
- Apr–Jun 202691 flights70.3%
- Jul–Sep 202662 flights59.7%
Scale runs 50% to 95%.
By weekday, UA 2240 did best on Sunday at 84.8% on time and worst on Friday at 68.1%. Each day rests on about 47 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2240 runs when it is late
The 81 late arrivals split 31 under half an hour, 19 between 30 and 60 minutes, and 31 an hour or more.
- 15+ min early68 flights20.7%
- Within 15 min179 flights54.6%
- 15–29 min late31 flights9.5%
- 30–59 min late19 flights5.8%
- 1–2 hours late20 flights6.1%
- 2+ hours late11 flights3.4%
Scale runs 0% to 100%.
Share of 328 completed flights by arrival against schedule.
20 of 84 late departures made up the time and arrived on time, 24% of them. In the other direction, 17 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 2240
The latest arrival of the period was on 14 August 2026, 6 hours 24 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 August 2026 | 6 hours 24 minutes | Late-arriving aircraft |
| 8 June 2026 | 5 hours 20 minutes | Late-arriving aircraft |
| 30 June 2026 | 4 hours 13 minutes | Late-arriving aircraft |
| 17 February 2026 | 4 hours 8 minutes | Late-arriving aircraft |
| 28 July 2026 | 4 hours 4 minutes | Late-arriving aircraft |
Delay causes
Why UA 2240 runs late
Late-arriving aircraft accounts for 59% of the 5,617 delay minutes carriers reported here, and the remaining four split what is left.
- 59%Late-arriving aircraft
- 26%Carrier
- 14%National Airspace System
- 1%Extreme weather
59% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,617 reported delay minutes here, that single category outweighs weather by 55 to one. The split is drawn from 5,617 delay minutes reported on UA 2240.
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
9.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
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 EWR to LAX (36), COS to DEN (24) and ORD to DEN (21), but none flew often enough under UA 2240 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. 328 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 2240
For a booking, read UA 2240 as 75.3% on time with 0.00% cancelled over 328 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 1013 on the same route83.8%
- United Airlines 405 on the same route91.2%
- 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.