Flight number record

UA 2345

United Airlines · Denver to Newark

Route: DEN → EWR
Departs: 06:00
Flights: 307
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 18 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 45 minutes. That rests on 307 flights, with a median arrival 19 minutes early.

Set against the rest of the country, UA 2345's record is 18 points better than the US average of 77.6%. That gap is worth roughly 182 fewer late arrivals for every thousand flights.

On time

95.8%

Arrivals under 15 minutes late, of 306 completed flights

Avg delay

47 min

Across delayed arrivals only, not all flights

Cancelled

0.33%

National rate is 1.81%

1 hour+ late

1.0%

National rate is 8.1%

These figures cover 307 flights between July 2025 and June 2026. The median arrival is 19 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.

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 258 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 06:00258 flights84.0%
Departs 06:0349 flights16.0%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 95.8%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

UA 2345 next to DEN to EWR

Every carrier on DEN to EWR combined arrived on time 77.5% of the time across 3,363 flights, so UA 2345 is 18 points ahead of it. Across its whole network United Airlines managed 79.0%, which this flight beats by 17 points.

UA 2345 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 2345thin sample	307	95.8%	47 min	0.33%	A+
All United Airlines on DEN–EWR	3,363	77.5%	80 min	1.58%	B
All carriers on DEN–EWR	3,363	77.5%	80 min	1.58%	B
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 2345 quarter by quarter

Quarter by quarter UA 2345 held fairly steady: 92.3% in Jul–Sep 2025, 93.5% in Oct–Dec 2025, 100.0% in Jan–Mar 2026 and 100.0% in Apr–Jun 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 202592 flights92.3%
Oct–Dec 202592 flights93.5%
Jan–Mar 202632 flights100.0%
Apr–Jun 202691 flights100.0%

Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, UA 2345 ranged from 88.6% on Sunday to 100.0% on Tuesday. With about 44 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why UA 2345 runs late

One category carries most of the weight here. National Airspace System accounts for 57% of the 609 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

National Airspace System
57%
Carrier
43%

The largest share of delay minutes, 43%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 261 of the 609 delay minutes reported here. The split is drawn from 609 delay minutes reported on UA 2345.

Cancellations are rare at 0.33%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is 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 1.0% land an hour or more behind schedule, against 8.1% 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 five other city pairs in the data, including EWR to ATL (38), 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: 95.8% on time and 0.33% cancelled. That is a base rate, not a promise about any single day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures