Flight number record
UA 671
United Airlines · Denver to Santa Barbara
- Route
- DEN → SBA
- Departs
- 11:30
- Flights
- 307
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 671, check with United Airlines.
UA 671 lands a B+, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by roughly 55 minutes on average. That is a workable record, not a spotless one. That rests on 307 flights, with a median arrival 1 minute early.
Key figures
On time
80.9%
Arrivals under 15 minutes late, of 304 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.81%
1 hour+ late
4.6%
National rate is 8.1%
These figures cover 307 flights between July 2025 and June 2026. On-time means an arrival less than 15 minutes after the scheduled gate time, the same threshold the Department of Transportation uses in its own reports. Cancelled and diverted flights are excluded from the on-time rate and counted separately, which is why the cancellation column matters on its own.
Schedule
When UA 671 flies
UA 671 flies DEN to SBA without a single fixed slot. Its most common scheduled departure was 11:30, used on 81 of 307 flights, with 11:31 (68 flights) and 11:26 (57 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 11:3081 flights26.4%
- Departs 11:3168 flights22.1%
- Departs 11:2657 flights18.6%
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 11:30 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and UA 671 runs 2 points better at 80.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
UA 671 next to DEN to SBA
Every carrier on DEN to SBA combined arrived on time 74.4% of the time across 1,097 flights, so UA 671 is 7 points ahead of it. United flew 827 flights on the same city pair under all its flight numbers, including this one, and those ran 76.0% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 671thin sample | 307 | 80.9% | 53 min | 0.00% | B+ |
| All United Airlines on DEN–SBA | 827 | 76.0% | 56 min | 0.73% | B+ |
| All carriers on DEN–SBA | 1,097 | 74.4% | 55 min | 0.55% | C+ |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 671 quarter by quarter
UA 671 did not run the same all year. Its best quarter was Jan–Mar 2026 at 89.6% on time and its weakest Jul–Sep 2025 at 77.8%, a swing of 12 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.
- Jul–Sep 202555 flights77.8%
- Oct–Dec 202592 flights79.3%
- Jan–Mar 202669 flights89.6%
- Apr–Jun 202691 flights78.0%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, UA 671 did best on Tuesday at 93.0% on time and worst on Friday at 75.0%. Each day rests on about 44 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Delay causes
Why UA 671 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 3,091 reported delay minutes.
- 36%Carrier
- 34%Late-arriving aircraft
- 30%National Airspace System
- 1%Extreme weather
The largest share of delay minutes, 36%, 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 1,099 of the 3,091 delay minutes reported here. The split is drawn from 3,091 delay minutes reported on UA 671.
Cancellations are rare at 0.00%, below the national 1.81% 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
Badly late arrivals are rare here: only 4.6% 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.
The 916 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 six other city pairs in the data, including JAX to DEN (134), XNA to DEN (49) and ORF to DEN (37), but none flew often enough under UA 671 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to SBA 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 671
For a booking, read UA 671 as 80.9% on time with 0.00% cancelled over 307 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DEN to SBA, every carrier and departure
- SBA to DEN, the return direction
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.