Flight number record
UA 1308
United Airlines · Denver to Pittsburgh
- Route
- DEN → PIT
- Departs
- 10:02
- Flights
- 310
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1308, check with United Airlines.
UA 1308 lands a B+, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about 45 minutes on average. That rests on 310 flights, with a median arrival 7 minutes early.
Set against the rest of the country, UA 1308's record is 6 points better than the US average of 77.3%. That gap is worth roughly 62 fewer late arrivals for every thousand flights.
Key figures
On time
83.5%
Arrivals under 15 minutes late, of 309 completed flights
Avg delay
46 min
Across delayed arrivals only, not all flights
Cancelled
0.32%
National rate is 1.89%
1 hour+ late
2.6%
National rate is 8.3%
These figures cover 310 flights between September 2025 and August 2026. The median arrival is 7 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 1308 flies
UA 1308 flies DEN to PIT without a single fixed slot. Its most common scheduled departure was 10:02, used on 55 of 310 flights, with 10:08 (52 flights) and 10:05 (51 flights) next.
- Departs 10:0255 flights17.7%
- Departs 10:0852 flights16.8%
- Departs 10:0551 flights16.5%
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 10:02 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and UA 1308 runs level with that at 83.5%. 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 1308 next to DEN to PIT
Every carrier on DEN to PIT combined arrived on time 74.1% of the time across 1,622 flights, so UA 1308 is 9 points ahead of it. United flew 819 flights on the same city pair under all its flight numbers, including this one, and those ran 81.2% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1308thin sample | 310 | 83.5% | 46 min | 0.32% | B+ |
| All United Airlines on DEN–PIT | 819 | 81.2% | 58 min | 0.49% | B+ |
| All carriers on DEN–PIT | 1,622 | 74.1% | 58 min | 0.49% | C+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1308 quarter by quarter
UA 1308 did not run the same all year. Its best quarter was Oct–Dec 2025 at 91.0% on time and its weakest Jan–Mar 2026 at 78.7%, a swing of 12 points on roughly 78 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.
- Oct–Dec 202567 flights91.0%
- Jan–Mar 202690 flights78.7%
- Apr–Jun 202691 flights84.6%
- Jul–Sep 202662 flights80.6%
Scale runs 70% to 95%.
By weekday, UA 1308 did best on Tuesday at 88.6% on time and worst on Monday at 75.6%. Each day rests on about 44 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1308 runs when it is late
UA 1308 often beats the schedule: 86 of 309 completed flights, 28%, arrived 15 minutes or more early. The 51 late arrivals split 20 under half an hour, 23 between 30 and 60 minutes, and 8 an hour or more.
- 15+ min early86 flights27.8%
- Within 15 min172 flights55.7%
- 15–29 min late20 flights6.5%
- 30–59 min late23 flights7.4%
- 1–2 hours late5 flights1.6%
- 2+ hours late3 flights1.0%
Scale runs 0% to 100%.
Share of 309 completed flights by arrival against schedule.
12 of 52 late departures made up the time and arrived on time, 23% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for UA 1308
The latest arrival of the period was on 22 May 2026, 4 hours 14 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 22 May 2026 | 4 hours 14 minutes | Late-arriving aircraft |
| 26 March 2026 | 2 hours 53 minutes | Carrier |
| 24 February 2026 | 2 hours 2 minutes | Carrier |
| 6 March 2026 | 1 hour 57 minutes | National Airspace System |
| 18 August 2026 | 1 hour 23 minutes | Carrier |
Delay causes
Why UA 1308 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 2,344 reported delay minutes.
- 40%Late-arriving aircraft
- 40%Carrier
- 21%National Airspace System
40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,344 reported delay minutes here, that single category outweighs weather by 40 to one. The split is drawn from 2,344 delay minutes reported on UA 1308.
Cancellations are rare at 0.32%, 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 2.6% 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 1,290 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 two other city pairs in the data, including EWR to ORD (47) and CHS to EWR (26), but none flew often enough under UA 1308 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to PIT only.
One caution: this is a thin sample. 310 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 1308
For a booking, read UA 1308 as 83.5% on time with 0.32% cancelled over 310 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DEN to PIT, every carrier and departure
- PIT to DEN, the return direction
- Denver International (DEN) delay statistics
- Pittsburgh International (PIT) 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.