Flight number record
UA 2430
United Airlines · Denver to Chicago
- Route
- DEN → ORD
- Departs
- 07:45
- Flights
- 269
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2430, check with United Airlines.
UA 2430 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 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 269 flights, with a median arrival 11 minutes early.
Set against the rest of the country, UA 2430's record is 10 points better than the US average of 77.3%. That gap is worth roughly 99 fewer late arrivals for every thousand flights.
Key figures
On time
87.2%
Arrivals under 15 minutes late, of 266 completed flights
Avg delay
65 min
Across delayed arrivals only, not all flights
Cancelled
0.74%
National rate is 1.89%
1 hour+ late
3.0%
National rate is 8.3%
These figures cover 269 flights between September 2025 and August 2026. The median arrival is 11 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 2430 flies
UA 2430 flies DEN to ORD without a single fixed slot. Its most common scheduled departure was 07:45, used on 98 of 269 flights, with 08:00 (64 flights) and 07:50 (35 flights) next.
- Departs 07:4598 flights36.4%
- Departs 08:0064 flights23.8%
- Departs 07:5035 flights13.0%
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 07:45 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and UA 2430 runs 2 points worse at 87.2%. 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 2430 next to DEN to ORD
Every carrier on DEN to ORD combined arrived on time 71.8% of the time across 6,109 flights, so UA 2430 is 15 points ahead of it. United flew 3,885 flights on the same city pair under all its flight numbers, including this one, and those ran 71.9% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2430thin sample | 269 | 87.2% | 65 min | 0.74% | A+ |
| All United Airlines on DEN–ORD | 3,885 | 71.9% | 82 min | 0.82% | C+ |
| All carriers on DEN–ORD | 6,109 | 71.8% | 88 min | 1.11% | C |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2430 quarter by quarter
UA 2430 did not run the same all year. Its best quarter was Apr–Jun 2026 at 92.9% on time and its weakest Jan–Mar 2026 at 82.2%, a swing of 11 points on roughly 90 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 202524 flights—
- Oct–Dec 202514 flights—
- Jan–Mar 202690 flights82.2%
- Apr–Jun 202685 flights92.9%
- Jul–Sep 202656 flights88.7%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 2430 did best on Thursday at 95.0% on time and worst on Friday at 82.1%. Each day rests on about 38 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2430 runs when it is late
UA 2430 often beats the schedule: 110 of 266 completed flights, 41%, arrived 15 minutes or more early. The 34 late arrivals split 15 under half an hour, 11 between 30 and 60 minutes, and 8 an hour or more.
- 15+ min early110 flights41.4%
- Within 15 min122 flights45.9%
- 15–29 min late15 flights5.6%
- 30–59 min late11 flights4.1%
- 1–2 hours late4 flights1.5%
- 2+ hours late4 flights1.5%
Scale runs 0% to 100%.
Share of 266 completed flights by arrival against schedule.
4 of 25 late departures made up the time and arrived on time, 16% of them. 13 flights left on time and still arrived late.
The worst days
Worst days for UA 2430
The latest arrival of the period was on 7 March 2026, 8 hours 51 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 March 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 March 2026 | 8 hours 51 minutes | Carrier |
| 15 March 2026 | 3 hours 10 minutes | National Airspace System |
| 11 August 2026 | 3 hours 9 minutes | Late-arriving aircraft |
| 6 March 2026 | 2 hours 16 minutes | National Airspace System |
| 12 August 2026 | 1 hour 53 minutes | National Airspace System |
Delay causes
Why UA 2430 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 2,203 reported delay minutes.
- 41%National Airspace System
- 31%Carrier
- 28%Late-arriving aircraft
41% 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 910 minutes out of 2,203, against a national NAS share of 21%. The split is drawn from 2,203 delay minutes reported on UA 2430.
Cancellations are rare at 0.74%, 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
Badly late arrivals are rare here: only 3.0% 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 888 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 four other city pairs in the data, including ORD to PHL (179), ORD to BNA (125) and PHL to IAH (56), but none flew often enough under UA 2430 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to ORD only.
One caution: this is a thin sample. 269 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 2430
For a booking, UA 2430 has one of the better records a US domestic flight can show: 87.2% on time and 0.74% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- DEN to ORD, every carrier and departure
- ORD to DEN, the return direction
- United Airlines 2865 on the same route79.2%
- United Airlines 2329 on the same route84.1%
- United Airlines 1023 on the same route59.8%
- United Airlines 617 on the same route68.8%
- United Airlines 1377 on the same route90.0%
- American Airlines 2771 on the same route87.9%
- Denver International (DEN) delay statistics
- Chicago O'Hare International (ORD) 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.