Flight number record
UA 1537
United Airlines · Denver to Jackson
- Route
- DEN → JAC
- Departs
- 13:55
- Flights
- 274
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1537, check with United Airlines.
UA 1537 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 an hour on average. That rests on 274 flights, with a median arrival 6 minutes early.
Set against the rest of the country, UA 1537's record is 6 points better than the US average of 77.3%. That gap is worth roughly 61 fewer late arrivals for every thousand flights.
Key figures
On time
83.4%
Arrivals under 15 minutes late, of 271 completed flights
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
6.6%
National rate is 8.3%
These figures cover 274 flights between September 2025 and August 2026. The median arrival is 6 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 1537 flies
UA 1537 flies DEN to JAC without a single fixed slot. Its most common scheduled departure was 13:55, used on 82 of 274 flights, with 13:45 (71 flights) and 13:44 (37 flights) next.
- Departs 13:5582 flights29.9%
- Departs 13:4571 flights25.9%
- Departs 13:4437 flights13.5%
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 13:55 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and UA 1537 runs 5 points better at 83.4%. 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 1537 next to DEN to JAC
Every carrier on DEN to JAC combined arrived on time 82.4% of the time across 1,632 flights, so UA 1537 is about level with it. United flew 1,162 flights on the same city pair under all its flight numbers, including this one, and those ran 78.6% 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 1537thin sample | 274 | 83.4% | 67 min | 0.00% | B+ |
| All United Airlines on DEN–JAC | 1,162 | 78.6% | 60 min | 0.60% | B+ |
| All carriers on DEN–JAC | 1,632 | 82.4% | 58 min | 1.10% | B |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1537 quarter by quarter
Quarter by quarter UA 1537 held fairly steady: 88.6% in Oct–Dec 2025, 81.9% in Jan–Mar 2026, 80.6% in Apr–Jun 2026 and 80.6% 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 flights—
- Oct–Dec 202537 flights88.6%
- Jan–Mar 202683 flights81.9%
- Apr–Jun 202662 flights80.6%
- Jul–Sep 202662 flights80.6%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1537 did best on Monday at 89.7% on time and worst on Sunday at 76.9%. Each day rests on about 39 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1537 runs when it is late
The 45 late arrivals split 13 under half an hour, 14 between 30 and 60 minutes, and 18 an hour or more.
- 15+ min early58 flights21.4%
- Within 15 min168 flights62.0%
- 15–29 min late13 flights4.8%
- 30–59 min late14 flights5.2%
- 1–2 hours late11 flights4.1%
- 2+ hours late7 flights2.6%
Scale runs 0% to 100%.
Share of 271 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 41 departures that left 15 minutes late or more, only 3 made it up before arrival. 7 flights left on time and still arrived late.
The worst days
Worst days for UA 1537
The latest arrival of the period was on 12 August 2026, 6 hours 9 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across August, July, May, June and February, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 12 August 2026 | 6 hours 9 minutes | Late-arriving aircraft |
| 25 July 2026 | 3 hours 34 minutes | Carrier |
| 29 May 2026 | 2 hours 42 minutes | Carrier |
| 21 June 2026 | 2 hours 27 minutes | Late-arriving aircraft |
| 18 February 2026 | 2 hours 14 minutes | Extreme weather |
Delay causes
Why UA 1537 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 3,008 reported delay minutes.
- 41%Late-arriving aircraft
- 32%Carrier
- 17%National Airspace System
- 10%Extreme weather
41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,008 reported delay minutes here, that single category outweighs weather by 4 to one. The split is drawn from 3,008 delay minutes reported on UA 1537.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
6.6% 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 about an hour, which a normal layover absorbs.
The same number turns up on six other city pairs in the data, including PHL to DEN (93), IAD to DEN (53) and XNA to DEN (37), but none flew often enough under UA 1537 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to JAC only.
One caution: this is a thin sample. 274 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 1537
For a booking, read UA 1537 as 83.4% on time with 0.00% cancelled over 274 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DEN to JAC, every carrier and departure
- JAC to DEN, the return direction
- United Airlines 2193 on the same route81.6%
- SkyWest Airlines 5730 on the same route93.4%
- United Airlines 1306 on the same route75.7%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.