Flight number record
UA 1430
United Airlines · San Francisco to Denver
- Route
- SFO → DEN
- Departs
- 16:10
- Flights
- 309
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1430, check with United Airlines.
UA 1430 lands a B+, about a point worse than the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 309 flights, with a median arrival 7 minutes early.
Key figures
On time
76.4%
Arrivals under 15 minutes late, of 309 completed flights
Avg delay
59 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
10.4%
National rate is 8.3%
These figures cover 309 flights between September 2025 and August 2026. Beyond the headline rate, 10.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 1430 flies
UA 1430 flies SFO to DEN without a single fixed slot. Its most common scheduled departure was 16:10, used on 58 of 309 flights, with 16:28 (52 flights) and 16:31 (37 flights) next.
- Departs 16:1058 flights18.8%
- Departs 16:2852 flights16.8%
- Departs 16:3137 flights12.0%
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 16:10 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 1430 runs 5 points better at 76.4%. 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 1430 next to SFO to DEN
Every carrier on SFO to DEN combined arrived on time 74.7% of the time across 5,486 flights, so UA 1430 is 2 points ahead of it. United flew 3,427 flights on the same city pair under all its flight numbers, including this one, and those ran 82.1% on time. 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 1430thin sample | 309 | 76.4% | 59 min | 0.00% | B+ |
| All United Airlines on SFO–DEN | 3,427 | 82.1% | 58 min | 0.18% | B+ |
| All carriers on SFO–DEN | 5,486 | 74.7% | 61 min | 0.46% | C+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1430 quarter by quarter
UA 1430 did not run the same all year. Its best quarter was Jan–Mar 2026 at 85.6% on time and its weakest Jul–Sep 2026 at 62.9%, a swing of 23 points on roughly 77 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.
- Oct–Dec 202566 flights74.2%
- Jan–Mar 202690 flights85.6%
- Apr–Jun 202691 flights78.0%
- Jul–Sep 202662 flights62.9%
Scale runs 55% to 90%.
By weekday, UA 1430 did best on Thursday at 86.0% on time and worst on Wednesday at 59.1%. Each day rests on about 44 flights, so a gap of 27 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1430 runs when it is late
UA 1430 often beats the schedule: 87 of 309 completed flights, 28%, arrived 15 minutes or more early. The 73 late arrivals split 23 under half an hour, 18 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early87 flights28.2%
- Within 15 min149 flights48.2%
- 15–29 min late23 flights7.4%
- 30–59 min late18 flights5.8%
- 1–2 hours late25 flights8.1%
- 2+ hours late7 flights2.3%
Scale runs 0% to 100%.
Share of 309 completed flights by arrival against schedule.
23 of 91 late departures made up the time and arrived on time, 25% of them. Only 5 left on time and still arrived late.
The worst days
Worst days for UA 1430
The latest arrival of the period was on 5 November 2025, 3 hours 56 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 5 November 2025 | 3 hours 56 minutes | Late-arriving aircraft |
| 5 January 2026 | 2 hours 51 minutes | Late-arriving aircraft |
| 7 July 2026 | 2 hours 35 minutes | Late-arriving aircraft |
| 20 February 2026 | 2 hours 32 minutes | Late-arriving aircraft |
| 14 August 2026 | 2 hours 32 minutes | National Airspace System |
Delay causes
Why UA 1430 runs late
Late-arriving aircraft accounts for 50% of the 4,309 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Late-arriving aircraft
- 29%National Airspace System
- 21%Carrier
50% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,309 reported delay minutes here, that single category outweighs weather by 50 to one. The split is drawn from 4,309 delay minutes reported on UA 1430.
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
10.4% 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 967 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 six other city pairs in the data, including PSP to SFO (77), PIT to IAD (42) and DEN to ORD (35), but none flew often enough under UA 1430 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SFO to DEN only.
One caution: this is a thin sample. 309 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 1430
For a booking, read UA 1430 as 76.4% on time with 0.00% cancelled over 309 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SFO to DEN, every carrier and departure
- DEN to SFO, the return direction
- Frontier Airlines 1230 on the same route89.1%
- United Airlines 2348 on the same route81.9%
- United Airlines 1596 on the same route67.7%
- San Francisco International (SFO) 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
- 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.