Flight number record
UA 1337
United Airlines · Denver to Portland
- Route
- DEN → PDX
- Departs
- 16:00
- Flights
- 327
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1337, check with United Airlines.
UA 1337 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 a little over an hour on average. That rests on 327 flights, with a median arrival 6 minutes early.
Set against the rest of the country, UA 1337'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 326 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
0.31%
National rate is 1.89%
1 hour+ late
6.7%
National rate is 8.3%
These figures cover 327 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 1337 flies
UA 1337 flies DEN to PDX without a single fixed slot. Its most common scheduled departure was 16:00, used on 210 of 327 flights, with 16:15 (48 flights) next.
- Departs 16:00210 flights64.2%
- Departs 16:1548 flights14.7%
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 16:00 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 1337 runs 12 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 1337 next to DEN to PDX
Every carrier on DEN to PDX combined arrived on time 74.8% of the time across 4,280 flights, so UA 1337 is 9 points ahead of it. United flew 1,822 flights on the same city pair under all its flight numbers, including this one, and those ran 82.3% 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 1337thin sample | 327 | 83.4% | 73 min | 0.31% | B+ |
| All United Airlines on DEN–PDX | 1,822 | 82.3% | 59 min | 0.38% | B+ |
| All carriers on DEN–PDX | 4,280 | 74.8% | 55 min | 0.33% | C+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1337 quarter by quarter
Quarter by quarter UA 1337 held fairly steady: 81.5% in Oct–Dec 2025, 85.9% in Jan–Mar 2026, 83.5% in Apr–Jun 2026 and 78.7% in Jul–Sep 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202524 flights—
- Oct–Dec 202566 flights81.5%
- Jan–Mar 202685 flights85.9%
- Apr–Jun 202691 flights83.5%
- Jul–Sep 202661 flights78.7%
Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1337 did best on Sunday at 91.7% on time and worst on Wednesday at 72.3%. Each day rests on about 47 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1337 runs when it is late
The 54 late arrivals split 18 under half an hour, 14 between 30 and 60 minutes, and 22 an hour or more.
- 15+ min early79 flights24.2%
- Within 15 min193 flights59.2%
- 15–29 min late18 flights5.5%
- 30–59 min late14 flights4.3%
- 1–2 hours late11 flights3.4%
- 2+ hours late11 flights3.4%
Scale runs 0% to 100%.
Share of 326 completed flights by arrival against schedule.
12 of 52 late departures made up the time and arrived on time, 23% of them. 14 flights left on time and still arrived late.
The worst days
Worst days for UA 1337
The latest arrival of the period was on 8 June 2026, 6 hours 34 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 8 June 2026 | 6 hours 34 minutes | Carrier |
| 21 August 2026 | 4 hours 9 minutes | Carrier |
| 26 May 2026 | 3 hours 25 minutes | Late-arriving aircraft |
| 17 February 2026 | 3 hours 18 minutes | Late-arriving aircraft |
| 11 September 2025 | 2 hours 58 minutes | Carrier |
Delay causes
Why UA 1337 runs late
Carrier accounts for 47% of the 3,924 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Carrier
- 36%Late-arriving aircraft
- 15%National Airspace System
- 2%Extreme weather
36% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,924 reported delay minutes here, that single category outweighs weather by 22 to one. The split is drawn from 3,924 delay minutes reported on UA 1337.
Cancellations are rare at 0.31%, 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
6.7% 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 991 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.
UA 1337 is not only a DEN to PDX flight. It also flew SAN to DEN (275 flights, 89.4% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 327 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SAN to DENthin sample | 275 | 89.4% | 72 min | 0.36% | A+ |
What to do with this
Booking UA 1337
For a booking, read UA 1337 as 83.4% on time with 0.31% cancelled over 327 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DEN to PDX, every carrier and departure
- PDX to DEN, the return direction
- United Airlines 498 on the same route77.4%
- United Airlines 1247 on the same route87.8%
- United Airlines 644 on the same route84.3%
- Denver International (DEN) delay statistics
- Portland International (PDX) 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.