Flight number record
UA 2345
United Airlines · Denver to Newark
- Route
- DEN → EWR
- Departs
- 06:00
- Flights
- 307
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2345, check with United Airlines.
UA 2345 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 19 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 55 minutes. That rests on 307 flights, with a median arrival 20 minutes early.
Set against the rest of the country, UA 2345's record is 19 points better than the US average of 77.3%. That gap is worth roughly 194 fewer late arrivals for every thousand flights.
Key figures
On time
96.7%
Arrivals under 15 minutes late, of 303 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
0.98%
National rate is 1.89%
1 hour+ late
1.3%
National rate is 8.3%
These figures cover 307 flights between September 2025 and August 2026. The median arrival is 20 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 2345 flies
UA 2345 is scheduled to leave Denver (DEN) at 06:00 local time and reach Newark (EWR) at 11:44. That slot held for 307 of the 307 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.
- Departs 06:00307 flights100.0%
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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and UA 2345 runs 7 points better at 96.7%. 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 2345 next to DEN to EWR
Every carrier on DEN to EWR combined arrived on time 78.8% of the time across 3,344 flights, so UA 2345 is 18 points ahead of it. Across its whole network United Airlines managed 78.8%, which this flight beats by 18 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2345thin sample | 307 | 96.7% | 55 min | 0.98% | A+ |
| All United Airlines on DEN–EWR | 3,344 | 78.8% | 83 min | 1.53% | B |
| All carriers on DEN–EWR | 3,344 | 78.8% | 83 min | 1.53% | B |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2345 quarter by quarter
Quarter by quarter UA 2345 held fairly steady: 96.7% in Jul–Sep 2025, 93.5% in Oct–Dec 2025, 100.0% in Jan–Mar 2026, 100.0% in Apr–Jun 2026 and 94.8% in Jul–Sep 2026. A spread of 7 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 flights93.5%
- Jan–Mar 202632 flights100.0%
- Apr–Jun 202691 flights100.0%
- Jul–Sep 202662 flights94.8%
Scale runs 85% to 100%.
By weekday, UA 2345 ranged from 92.9% on Wednesday to 100.0% on Friday. With about 44 flights behind each day, a spread of 7 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late UA 2345 runs when it is late
UA 2345 often beats the schedule: 184 of 303 completed flights, 61%, arrived 15 minutes or more early. The 10 late arrivals split 3 under half an hour, 3 between 30 and 60 minutes, and 4 an hour or more. Not one arrived two hours late.
- 15+ min early184 flights60.7%
- Within 15 min109 flights36.0%
- 15–29 min late3 flights1.0%
- 30–59 min late3 flights1.0%
- 1–2 hours late4 flights1.3%
- 2+ hours late0 flights0.0%
Scale runs 0% to 100%.
Share of 303 completed flights by arrival against schedule.
Only 6 of 303 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for UA 2345
The latest arrival of the period was on 20 November 2025, 1 hour 58 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 |
|---|---|---|
| 20 November 2025 | 1 hour 58 minutes | Carrier |
| 26 August 2026 | 1 hour 23 minutes | Carrier |
| 8 November 2025 | 1 hour 19 minutes | National Airspace System |
| 24 December 2025 | 1 hour 16 minutes | Carrier |
| 14 December 2025 | 53 minutes | National Airspace System |
Delay causes
Why UA 2345 runs late
Carrier accounts for 56% of the 547 delay minutes carriers reported here, and the remaining four split what is left.
- 56%Carrier
- 44%National Airspace System
The largest share of delay minutes, 56%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 306 of the 547 delay minutes reported here. The split is drawn from 547 delay minutes reported on UA 2345.
Cancellations sit at 0.98% against a national 1.89%, which is ordinary. Diversions add another 0.33%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 1.3% 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.
At 1,605 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The same number turns up on four other city pairs in the data, including EWR to ATL (56), MCI to IAH (37) and EWR to RSW (36), but none flew often enough under UA 2345 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to EWR only.
One caution: this is a thin sample. 307 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 2345
For a booking, UA 2345 has one of the better records a US domestic flight can show: 96.7% on time and 0.98% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- DEN to EWR, every carrier and departure
- EWR to DEN, the return direction
- United Airlines 1233 on the same route78.4%
- United Airlines 1715 on the same route66.2%
- United Airlines 2613 on the same route70.1%
- United Airlines 1283 on the same route70.5%
- United Airlines 1505 on the same route69.0%
- United Airlines 1745 on the same route91.6%
- Denver International (DEN) delay statistics
- Newark Liberty International (EWR) 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.