Flight number record
UA 2271
United Airlines · Denver to Seattle
- Route
- DEN → SEA
- Departs
- 07:45
- Flights
- 314
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 2271, check with United Airlines.
UA 2271 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 13 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 40 minutes. That rests on 314 flights, with a median arrival 11 minutes early.
Set against the rest of the country, UA 2271's record is 13 points better than the US average of 77.6%. That gap is worth roughly 131 fewer late arrivals for every thousand flights.
Key figures
On time
90.7%
Arrivals under 15 minutes late, of 311 completed flights
Avg delay
38 min
Across delayed arrivals only, not all flights
Cancelled
0.96%
National rate is 1.81%
1 hour+ late
1.6%
National rate is 8.1%
These figures cover 314 flights between July 2025 and June 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.
Schedule
When UA 2271 flies
UA 2271 flies DEN to SEA without a single fixed slot. Its most common scheduled departure was 07:45, used on 137 of 314 flights, with 08:01 (65 flights) and 08:00 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 07:45137 flights43.6%
- Departs 08:0165 flights20.7%
- Departs 08:0038 flights12.1%
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 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 2271 runs level with that at 90.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Against the route
UA 2271 next to DEN to SEA
Every carrier on DEN to SEA combined arrived on time 73.9% of the time across 6,309 flights, so UA 2271 is 17 points ahead of it. United flew 1,903 flights on the same city pair under all its flight numbers, including this one, and those ran 80.0% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2271thin sample | 314 | 90.7% | 38 min | 0.96% | A+ |
| All United Airlines on DEN–SEA | 1,903 | 80.0% | 55 min | 0.63% | B+ |
| All carriers on DEN–SEA | 6,309 | 73.9% | 57 min | 0.76% | C+ |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 2271 quarter by quarter
Quarter by quarter UA 2271 held fairly steady: 88.4% in Jul–Sep 2025, 87.5% in Oct–Dec 2025, 92.1% in Jan–Mar 2026 and 93.4% in Apr–Jun 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202543 flights88.4%
- Oct–Dec 202591 flights87.5%
- Jan–Mar 202689 flights92.1%
- Apr–Jun 202691 flights93.4%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 2271 ranged from 88.4% on Friday to 95.6% on Sunday. With about 45 flights behind each day, a spread of 7 points is inside normal variation, so the day you fly is not worth changing for this flight.
Delay causes
Why UA 2271 runs late
One category carries most of the weight here. National Airspace System accounts for 44% of the 1,111 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.
- 44%National Airspace System
- 35%Carrier
- 21%Late-arriving aircraft
The largest share of delay minutes, 35%, 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 387 of the 1,111 delay minutes reported here. The split is drawn from 1,111 delay minutes reported on UA 2271.
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
Badly late arrivals are rare here: only 1.6% 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 1,024 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 three other city pairs in the data, including FLL to EWR (31), SEA to EWR (24) and IAD to SLC (18), but none flew often enough under UA 2271 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to SEA only.
One caution: this is a thin sample. 314 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 2271
For a booking, UA 2271 has one of the better records a US domestic flight can show: 90.7% on time and 0.96% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- DEN to SEA, every carrier and departure
- SEA to DEN, the return direction
- Delta Air Lines 1731 on the same route89.4%
- Alaska Airlines 643 on the same route88.1%
- Alaska Airlines 682 on the same route81.2%
- Denver International (DEN) delay statistics
- Seattle-Tacoma International (SEA) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.