Flight number record
UA 2120
United Airlines · Newark to Denver
- Route
- EWR → DEN
- Departs
- 14:10
- Flights
- 340
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2120, check with United Airlines.
UA 2120 lands a B+, level with the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 340 flights, with a median arrival 6 minutes early.
Key figures
On time
76.6%
Arrivals under 15 minutes late, of 333 completed flights
Avg delay
83 min
Across delayed arrivals only, not all flights
Cancelled
0.88%
National rate is 1.89%
1 hour+ late
9.3%
National rate is 8.3%
These figures cover 340 flights between September 2025 and August 2026. Beyond the headline rate, 9.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 2120 flies
UA 2120 flies EWR to DEN without a single fixed slot. Its most common scheduled departure was 14:10, used on 91 of 340 flights, with 14:40 (58 flights) and 14:07 (37 flights) next.
- Departs 14:1091 flights26.8%
- Departs 14:4058 flights17.1%
- Departs 14:0737 flights10.9%
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 14:10 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 2120 runs 5 points better at 76.6%. 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 2120 next to EWR to DEN
Every carrier on EWR to DEN combined arrived on time 77.6% of the time across 3,349 flights, so UA 2120 is about level with it. Across its whole network United Airlines managed 78.8%, which this flight trails by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2120thin sample | 340 | 76.6% | 83 min | 0.88% | B+ |
| All United Airlines on EWR–DEN | 3,349 | 77.6% | 84 min | 1.46% | B |
| All carriers on EWR–DEN | 3,349 | 77.6% | 84 min | 1.46% | B |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2120 quarter by quarter
UA 2120 did not run the same all year. Its best quarter was Apr–Jun 2026 at 86.2% on time and its weakest Jul–Sep 2026 at 61.7%, a swing of 25 points on roughly 85 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 flights—
- Oct–Dec 202591 flights70.3%
- Jan–Mar 202690 flights81.8%
- Apr–Jun 202667 flights86.2%
- Jul–Sep 202662 flights61.7%
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, UA 2120 ranged from 71.4% on Saturday to 81.2% on Monday. With about 49 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late UA 2120 runs when it is late
UA 2120 often beats the schedule: 105 of 333 completed flights, 32%, arrived 15 minutes or more early. The 78 late arrivals split 30 under half an hour, 17 between 30 and 60 minutes, and 31 an hour or more.
- 15+ min early105 flights31.5%
- Within 15 min150 flights45.0%
- 15–29 min late30 flights9.0%
- 30–59 min late17 flights5.1%
- 1–2 hours late17 flights5.1%
- 2+ hours late14 flights4.2%
Scale runs 0% to 100%.
Share of 333 completed flights by arrival against schedule.
14 of 64 late departures made up the time and arrived on time, 22% of them. In the other direction, 28 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 DEN.
The worst days
Worst days for UA 2120
The latest arrival of the period was on 27 August 2026, 10 hours 47 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in August 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 27 August 2026 | 10 hours 47 minutes | Carrier |
| 6 August 2026 | 8 hours 24 minutes | National Airspace System |
| 7 August 2026 | 6 hours 41 minutes | Extreme weather |
| 6 September 2025 | 4 hours 51 minutes | Carrier |
| 9 November 2025 | 4 hours 14 minutes | Carrier |
Delay causes
Why UA 2120 runs late
National Airspace System accounts for 42% of the 6,435 delay minutes carriers reported here, and the remaining four split what is left.
- 42%National Airspace System
- 35%Carrier
- 18%Late-arriving aircraft
- 6%Extreme weather
42% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 2,704 minutes out of 6,435, against a national NAS share of 21%. The split is drawn from 6,435 delay minutes reported on UA 2120.
Cancellations are rare at 0.88%, below the national 1.89% 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
9.3% 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.
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 MCO to EWR (189), TPA to EWR (53) and RSW to EWR (37), but none flew often enough under UA 2120 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to EWR to DEN only.
One caution: this is a thin sample. 340 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 2120
For a booking, read UA 2120 as 76.6% on time with 0.88% cancelled over 340 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- EWR to DEN, every carrier and departure
- DEN to EWR, the return direction
- United Airlines 1197 on the same route69.7%
- United Airlines 1792 on the same route71.3%
- United Airlines 407 on the same route67.2%
- United Airlines 2455 on the same route83.3%
- Newark Liberty International (EWR) delay statistics
- Denver International (DEN) 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
- How often a connection fails at the major US hubs
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.