Flight number record
UA 1007
United Airlines · Denver to San Francisco
- Route
- DEN → SFO
- Departs
- 17:59
- Flights
- 312
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1007, check with United Airlines.
UA 1007 draws a C+. About one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 312 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.6%, so UA 1007 runs 10 points behind the country as a whole. Across a thousand flights that is about 100 extra late arrivals.
Key figures
On time
67.6%
Arrivals under 15 minutes late, of 309 completed flights
Avg delay
90 min
Across delayed arrivals only, not all flights
Cancelled
0.96%
National rate is 1.81%
1 hour+ late
16.5%
National rate is 8.1%
These figures cover 312 flights between July 2025 and June 2026. Beyond the headline rate, 16.5% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Schedule
When UA 1007 flies
UA 1007 flies DEN to SFO without a single fixed slot. Its most common scheduled departure was 17:59, used on 107 of 312 flights, with 17:54 (41 flights) and 17:50 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 17:59107 flights34.3%
- Departs 17:5441 flights13.1%
- Departs 17:5037 flights11.9%
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 17:59 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and UA 1007 runs level with that at 67.6%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Against the route
UA 1007 next to DEN to SFO
Every carrier on DEN to SFO combined arrived on time 65.8% of the time across 5,415 flights, so UA 1007 is 2 points ahead of it. United flew 3,373 flights on the same city pair under all its flight numbers, including this one, and those ran 71.2% on time. Across its whole network United Airlines managed 79.0%, which this flight trails by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1007thin sample | 312 | 67.6% | 90 min | 0.96% | C+ |
| All United Airlines on DEN–SFO | 3,373 | 71.2% | 63 min | 0.42% | C+ |
| All carriers on DEN–SFO | 5,415 | 65.8% | 61 min | 0.48% | C+ |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 1007 quarter by quarter
UA 1007 did not run the same all year. Its best quarter was Jan–Mar 2026 at 78.3% on time and its weakest Jul–Sep 2025 at 62.7%, a swing of 16 points on roughly 78 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 202586 flights62.7%
- Oct–Dec 202566 flights66.7%
- Jan–Mar 202669 flights78.3%
- Apr–Jun 202691 flights64.8%
Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1007 did best on Tuesday at 82.6% on time and worst on Sunday at 53.3%. Each day rests on about 45 flights, so a gap of 29 points is worth noticing but could still narrow in another year.
Delay causes
Why UA 1007 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 46% of the 8,975 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.
- 46%Late-arriving aircraft
- 44%National Airspace System
- 10%Carrier
- 0%Extreme weather
46% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 8,975 reported delay minutes here, that single category outweighs weather by 46 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 8,975 delay minutes reported on UA 1007.
Cancellations sit at 0.96% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 16.5% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The same number turns up on seven other city pairs in the data, including SFO to SEA (180), MEM to DEN (52) and SAT to DEN (40), but none flew often enough under UA 1007 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to SFO only.
One caution: this is a thin sample. 312 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 1007
For a booking, UA 1007 is a flight to put a long connection behind. 16.5% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- DEN to SFO, every carrier and departure
- SFO to DEN, the return direction
- United Airlines 2633 on the same route75.4%
- United Airlines 2367 on the same route95.3%
- United Airlines 1812 on the same route75.3%
- United Airlines 1561 on the same route71.0%
- United Airlines 2391 on the same route70.8%
- Frontier Airlines 3439 on the same route68.6%
- Denver International (DEN) delay statistics
- San Francisco International (SFO) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.