Flight number record

UA 1337

United Airlines · Denver to Portland

Route: DEN → PDX
Departs: 16:00
Flights: 328
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1337, check with United Airlines.

UA 1337 lands a B+, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 328 flights, with a median arrival 5 minutes early.

Set against the rest of the country, UA 1337's record is 5 points better than the US average of 77.6%. That gap is worth roughly 47 fewer late arrivals for every thousand flights.

On time

82.3%

Arrivals under 15 minutes late, of 327 completed flights

Avg delay

64 min

Across delayed arrivals only, not all flights

Cancelled

0.30%

National rate is 1.81%

1 hour+ late

6.7%

National rate is 8.1%

These figures cover 328 flights between July 2025 and June 2026. The median arrival is 5 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 1337 flies

UA 1337 flies DEN to PDX without a single fixed slot. Its most common scheduled departure was 16:00, used on 171 of 328 flights, with 16:15 (48 flights) and 15:40 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 16:00171 flights52.1%
Departs 16:1548 flights14.6%
Departs 15:4037 flights11.3%

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 16:00 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and UA 1337 runs 10 points better at 82.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

UA 1337 next to DEN to PDX

Every carrier on DEN to PDX combined arrived on time 73.9% of the time across 4,289 flights, so UA 1337 is 8 points ahead of it. United flew 1,821 flights on the same city pair under all its flight numbers, including this one, and those ran 81.7% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 3 points.

UA 1337 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1337thin sample	328	82.3%	64 min	0.30%	B+
All United Airlines on DEN–PDX	1,821	81.7%	60 min	0.44%	B+
All carriers on DEN–PDX	4,289	73.9%	53 min	0.44%	C+
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 1337 quarter by quarter

Quarter by quarter UA 1337 held fairly steady: 77.9% in Jul–Sep 2025, 81.5% in Oct–Dec 2025, 85.9% in Jan–Mar 2026 and 83.5% in Apr–Jun 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 202586 flights77.9%
Oct–Dec 202566 flights81.5%
Jan–Mar 202685 flights85.9%
Apr–Jun 202691 flights83.5%

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 70.2%. Each day rests on about 47 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 1337 runs late

One category carries most of the weight here. Carrier accounts for 45% of the 3,714 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.

Carrier
45%
Late-arriving aircraft
35%
National Airspace System
15%
Extreme weather
5%

35% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 3,714 reported delay minutes here, that single category outweighs weather by 7 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 3,714 delay minutes reported on UA 1337.

Cancellations are rare at 0.30%, below the national 1.81% 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 8.1%. That is the figure that decides a connection, and it says 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 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

UA 1337 is not only a DEN to PDX flight. It also flew SAN to DEN (288 flights, 88.5% 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. 328 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.

Other routes flown as UA 1337
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SAN to DENthin sample	288	88.5%	67 min	0.35%	A+

What to do with this

Booking UA 1337

For a booking, read UA 1337 as 82.3% on time with 0.30% cancelled over 328 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

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.

Key figures