Flight number record
UA 1959
United Airlines · Anchorage to Denver
- Route
- ANC → DEN
- Departs
- 23:45
- Flights
- 329
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 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 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 329 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 77.6%. That gap is worth roughly 95 fewer late arrivals for every thousand flights.
Key figures
On time
87.1%
Arrivals under 15 minutes late, of 326 completed flights
Avg delay
87 min
Across delayed arrivals only, not all flights
Cancelled
0.91%
National rate is 1.81%
1 hour+ late
4.9%
National rate is 8.1%
These figures cover 329 flights between July 2025 and June 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.
Schedule
When UA 1959 flies
UA 1959 flies ANC to DEN without a single fixed slot. Its most common scheduled departure was 23:45, used on 129 of 329 flights, with 23:59 (72 flights) and 23:49 (50 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 23:45129 flights39.2%
- Departs 23:5972 flights21.9%
- Departs 23:4950 flights15.2%
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 23:45 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and UA 1959 runs 17 points better at 87.1%. 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 1959 next to ANC to DEN
Every carrier on ANC to DEN combined arrived on time 82.5% of the time across 735 flights, so UA 1959 is 5 points ahead of it. United flew 560 flights on the same city pair under all its flight numbers, including this one, and those ran 83.5% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1959thin sample | 329 | 87.1% | 87 min | 0.91% | A+ |
| All United Airlines on ANC–DEN | 560 | 83.5% | 71 min | 1.25% | B |
| All carriers on ANC–DEN | 735 | 82.5% | 66 min | 0.95% | B+ |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | 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 82 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 202592 flights88.0%
- Oct–Dec 202592 flights84.8%
- Jan–Mar 202675 flights80.0%
- Apr–Jun 202670 flights97.0%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1959 did best on Tuesday at 95.3% on time and worst on Sunday at 80.0%. Each day rests on about 47 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Delay causes
Why UA 1959 runs late
One category carries most of the weight here. Carrier accounts for 59% of the 3,658 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.
- 59%Carrier
- 34%Late-arriving aircraft
- 6%National Airspace System
- 2%Extreme weather
The largest share of delay minutes, 59%, 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 2,145 of the 3,658 delay minutes reported here. The split is drawn from 3,658 delay minutes reported on UA 1959.
Cancellations sit at 0.91% 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 4.9% 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.
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. 329 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: 87.1% on time and 0.91% 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
- 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.