Flight number record
UA 1959
United Airlines · Anchorage to Denver
- Route
- ANC → DEN
- Departs
- 23:59
- Flights
- 317
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1959, check with United Airlines.
UA 1959 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 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 317 flights, with a median arrival 12 minutes early.
Set against the rest of the country, UA 1959's record is 10 points better than the US average of 77.3%. That gap is worth roughly 103 fewer late arrivals for every thousand flights.
Key figures
On time
87.6%
Arrivals under 15 minutes late, of 314 completed flights
Avg delay
88 min
Across delayed arrivals only, not all flights
Cancelled
0.95%
National rate is 1.89%
1 hour+ late
4.5%
National rate is 8.3%
These figures cover 317 flights between September 2025 and August 2026. The median arrival is 12 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 1959 flies
UA 1959 flies ANC to DEN without a single fixed slot. Its most common scheduled departure was 23:59, used on 72 of 317 flights, with 23:45 (67 flights) and 23:49 (50 flights) next.
- Departs 23:5972 flights22.7%
- Departs 23:4567 flights21.1%
- Departs 23:4950 flights15.8%
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 23:59 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and UA 1959 runs 18 points better at 87.6%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
UA 1959 next to ANC to DEN
Every carrier on ANC to DEN combined arrived on time 81.5% of the time across 852 flights, so UA 1959 is 6 points ahead of it. United flew 615 flights on the same city pair under all its flight numbers, including this one, and those ran 84.4% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1959thin sample | 317 | 87.6% | 88 min | 0.95% | A+ |
| All United Airlines on ANC–DEN | 615 | 84.4% | 74 min | 1.30% | B |
| All carriers on ANC–DEN | 852 | 81.5% | 67 min | 0.94% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1959 quarter by quarter
UA 1959 did not run the same all year. Its best quarter was Apr–Jun 2026 at 97.0% on time and its weakest Jan–Mar 2026 at 80.0%, a swing of 17 points on roughly 63 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 202530 flights93.3%
- Oct–Dec 202592 flights84.8%
- Jan–Mar 202675 flights80.0%
- Apr–Jun 202670 flights97.0%
- Jul–Sep 202650 flights88.0%
Scale runs 70% to 100%.
By weekday, UA 1959 did best on Tuesday at 100.0% on time and worst on Sunday at 82.0%. Each day rests on about 45 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1959 runs when it is late
UA 1959 often beats the schedule: 140 of 314 completed flights, 45%, arrived 15 minutes or more early. The 39 late arrivals split 16 under half an hour, 9 between 30 and 60 minutes, and 14 an hour or more.
- 15+ min early140 flights44.6%
- Within 15 min135 flights43.0%
- 15–29 min late16 flights5.1%
- 30–59 min late9 flights2.9%
- 1–2 hours late11 flights3.5%
- 2+ hours late3 flights1.0%
Scale runs 0% to 100%.
Share of 314 completed flights by arrival against schedule.
A late pushback is often recovered here: of 50 departures that left 15 minutes late or more, 15 still arrived on time. Only 4 left on time and still arrived late.
The worst days
Worst days for UA 1959
The latest arrival of the period was on 3 December 2025, 13 hours 50 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in March 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 December 2025 | 13 hours 50 minutes | Carrier |
| 8 March 2026 | 13 hours 30 minutes | Carrier |
| 14 March 2026 | 2 hours 24 minutes | Carrier |
| 29 September 2025 | 1 hour 44 minutes | Carrier |
| 15 March 2026 | 1 hour 36 minutes | Late-arriving aircraft |
Delay causes
Why UA 1959 runs late
Carrier accounts for 62% of the 3,426 delay minutes carriers reported here, and the remaining four split what is left.
- 62%Carrier
- 31%Late-arriving aircraft
- 6%National Airspace System
- 2%Extreme weather
The largest share of delay minutes, 62%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,114 of the 3,426 delay minutes reported here. The split is drawn from 3,426 delay minutes reported on UA 1959.
Cancellations sit at 0.95% against a national 1.89%, 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 4.5% 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.
At 2,405 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The same number turns up on five other city pairs in the data, including FLL to DEN (5), DEN to IND (3) and DEN to SLC (2), but none flew often enough under UA 1959 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ANC to DEN only.
One caution: this is a thin sample. 317 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 1959
For a booking, UA 1959 has one of the better records a US domestic flight can show: 87.6% on time and 0.95% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- ANC to DEN, every carrier and departure
- DEN to ANC, 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
- 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.