Flight number record
UA 2271
United Airlines · Denver to Seattle
- Route
- DEN → SEA
- Departs
- 07:45
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 15 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 35 minutes. That rests on 363 flights, with a median arrival 11 minutes early.
Set against the rest of the country, UA 2271's record is 15 points better than the US average of 77.3%. That gap is worth roughly 146 fewer late arrivals for every thousand flights.
Key figures
On time
91.9%
Arrivals under 15 minutes late, of 360 completed flights
Avg delay
37 min
Across delayed arrivals only, not all flights
Cancelled
0.83%
National rate is 1.89%
1 hour+ late
0.8%
National rate is 8.3%
These figures cover 363 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 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 363 flights, with 08:01 (100 flights) next.
- Departs 07:45137 flights37.7%
- Departs 08:01100 flights27.5%
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 2271 runs 3 points better at 91.9%. 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 2271 next to DEN to SEA
Every carrier on DEN to SEA combined arrived on time 74.5% of the time across 6,328 flights, so UA 2271 is 17 points ahead of it. United flew 1,908 flights on the same city pair under all its flight numbers, including this one, and those ran 80.9% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2271thin sample | 363 | 91.9% | 37 min | 0.83% | A+ |
| All United Airlines on DEN–SEA | 1,908 | 80.9% | 57 min | 0.47% | B+ |
| All carriers on DEN–SEA | 6,328 | 74.5% | 58 min | 0.60% | C+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2271 quarter by quarter
Quarter by quarter UA 2271 held fairly steady: 93.3% in Jul–Sep 2025, 87.5% in Oct–Dec 2025, 92.1% in Jan–Mar 2026, 93.4% in Apr–Jun 2026 and 95.2% in Jul–Sep 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights93.3%
- Oct–Dec 202591 flights87.5%
- Jan–Mar 202689 flights92.1%
- Apr–Jun 202691 flights93.4%
- Jul–Sep 202662 flights95.2%
Scale runs 80% to 100%.
By weekday, UA 2271 ranged from 90.0% on Friday to 98.1% on Sunday. With about 52 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late UA 2271 runs when it is late
UA 2271 often beats the schedule: 140 of 360 completed flights, 39%, arrived 15 minutes or more early. The 29 late arrivals split 14 under half an hour, 12 between 30 and 60 minutes, and 3 an hour or more.
- 15+ min early140 flights38.9%
- Within 15 min191 flights53.1%
- 15–29 min late14 flights3.9%
- 30–59 min late12 flights3.3%
- 1–2 hours late2 flights0.6%
- 2+ hours late1 flights0.3%
Scale runs 0% to 100%.
Share of 360 completed flights by arrival against schedule.
Only 14 of 360 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for UA 2271
The latest arrival of the period was on 23 July 2026, 2 hours 12 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 23 July 2026 | 2 hours 12 minutes | Late-arriving aircraft |
| 30 March 2026 | 1 hour 15 minutes | Late-arriving aircraft |
| 22 June 2026 | 1 hour 13 minutes | Late-arriving aircraft |
| 18 September 2025 | 59 minutes | National Airspace System |
| 22 August 2026 | 53 minutes | National Airspace System |
Delay causes
Why UA 2271 runs late
National Airspace System accounts for 54% of the 1,069 delay minutes carriers reported here, and the remaining four split what is left.
- 54%National Airspace System
- 26%Late-arriving aircraft
- 20%Carrier
54% 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 574 minutes out of 1,069, against a national NAS share of 21%. The split is drawn from 1,069 delay minutes reported on UA 2271.
Cancellations are rare at 0.83%, 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 0.8% 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 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.
The same number turns up on one other city pair in the data, including SEA to EWR (24), 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. 363 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: 91.9% on time and 0.83% 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 route89.5%
- United Airlines 2013 on the same route77.9%
- United Airlines 1424 on the same route85.7%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.