Flight number record
UA 2013
United Airlines · Denver to Seattle
- Route
- DEN → SEA
- Departs
- 15:58
- Flights
- 291
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2013, check with United Airlines.
UA 2013 lands a B+, level with the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 291 flights, with a median arrival 4 minutes early.
Key figures
On time
77.9%
Arrivals under 15 minutes late, of 289 completed flights
Avg delay
68 min
Across delayed arrivals only, not all flights
Cancelled
0.69%
National rate is 1.89%
1 hour+ late
8.7%
National rate is 8.3%
These figures cover 291 flights between September 2025 and August 2026. Beyond the headline rate, 8.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 2013 flies
UA 2013 flies DEN to SEA without a single fixed slot. Its most common scheduled departure was 15:58, used on 67 of 291 flights, with 16:00 (41 flights) and 16:20 (36 flights) next.
- Departs 15:5867 flights23.0%
- Departs 16:0041 flights14.1%
- Departs 16:2036 flights12.4%
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 15:58 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 2013 runs 6 points better at 77.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
UA 2013 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 2013 is 3 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%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2013thin sample | 291 | 77.9% | 68 min | 0.69% | B+ |
| 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 2013 quarter by quarter
UA 2013 did not run the same all year. Its best quarter was Oct–Dec 2025 at 86.0% on time and its weakest Jul–Sep 2026 at 66.7%, a swing of 19 points on roughly 73 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 202550 flights86.0%
- Jan–Mar 202689 flights84.1%
- Apr–Jun 202691 flights74.7%
- Jul–Sep 202661 flights66.7%
Scale runs 60% to 90%.
By weekday, UA 2013 did best on Thursday at 87.8% on time and worst on Monday at 69.8%. Each day rests on about 42 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2013 runs when it is late
UA 2013 often beats the schedule: 75 of 289 completed flights, 26%, arrived 15 minutes or more early. The 64 late arrivals split 24 under half an hour, 15 between 30 and 60 minutes, and 25 an hour or more.
- 15+ min early75 flights26.0%
- Within 15 min150 flights51.9%
- 15–29 min late24 flights8.3%
- 30–59 min late15 flights5.2%
- 1–2 hours late15 flights5.2%
- 2+ hours late10 flights3.5%
Scale runs 0% to 100%.
Share of 289 completed flights by arrival against schedule.
15 of 59 late departures made up the time and arrived on time, 25% of them. In the other direction, 20 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SEA.
The worst days
Worst days for UA 2013
The latest arrival of the period was on 6 March 2026, 5 hours 17 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across March, November, June, July and February, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 6 March 2026 | 5 hours 17 minutes | Late-arriving aircraft |
| 28 November 2025 | 4 hours 25 minutes | Carrier |
| 8 June 2026 | 4 hours 9 minutes | Extreme weather |
| 11 July 2026 | 3 hours 54 minutes | Carrier |
| 17 February 2026 | 3 hours 31 minutes | Late-arriving aircraft |
Delay causes
Why UA 2013 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 4,367 reported delay minutes.
- 40%Carrier
- 31%Late-arriving aircraft
- 21%National Airspace System
- 8%Extreme weather
The largest share of delay minutes, 40%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,761 of the 4,367 delay minutes reported here. The split is drawn from 4,367 delay minutes reported on UA 2013.
Cancellations are rare at 0.69%, 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
8.7% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
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 four other city pairs in the data, including IAH to DEN (148), SJC to DEN (21) and AUS to IAH (21), but none flew often enough under UA 2013 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. 291 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 2013
For a booking, read UA 2013 as 77.9% on time with 0.69% cancelled over 291 flights. Those are rates from the past twelve months, not a forecast for any particular 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%
- United Airlines 2271 on the same route91.9%
- Alaska Airlines 643 on the same route89.5%
- 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.