Flight number record

UA 2087

United Airlines · Denver to Washington

Route: DEN → IAD
Departs: 10:20
Flights: 341
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 2087, check with United Airlines.

UA 2087 lands a B+, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by roughly 50 minutes on average. That is a workable record, not a spotless one. That rests on 341 flights, with a median arrival 4 minutes early.

On time

80.1%

Arrivals under 15 minutes late, of 336 completed flights

Avg delay

52 min

Across delayed arrivals only, not all flights

Cancelled

0.59%

National rate is 1.81%

1 hour+ late

5.7%

National rate is 8.1%

These figures cover 341 flights between July 2025 and June 2026. The median arrival is 4 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 2087 flies

UA 2087 flies DEN to IAD without a single fixed slot. Its most common scheduled departure was 10:20, used on 99 of 341 flights, with 10:12 (68 flights) and 10:15 (51 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:2099 flights29.0%
Departs 10:1268 flights19.9%
Departs 10:1551 flights15.0%

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 10:20 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and UA 2087 runs 4 points worse at 80.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

UA 2087 next to DEN to IAD

Every carrier on DEN to IAD combined arrived on time 80.3% of the time across 3,558 flights, so UA 2087 is about level with it. United flew 2,797 flights on the same city pair under all its flight numbers, including this one, and those ran 84.4% on time. Across its whole network United Airlines managed 79.0%, close to this flight's figure.

UA 2087 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 2087thin sample	341	80.1%	52 min	0.59%	B+
All United Airlines on DEN–IAD	2,797	84.4%	70 min	0.46%	B+
All carriers on DEN–IAD	3,558	80.3%	64 min	0.56%	B+
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 2087 quarter by quarter

UA 2087 did not run the same all year. Its best quarter was Oct–Dec 2025 at 86.8% on time and its weakest Jul–Sep 2025 at 73.0%, a swing of 14 points on roughly 85 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.

Jul–Sep 202592 flights73.0%
Oct–Dec 202592 flights86.8%
Jan–Mar 202666 flights76.9%
Apr–Jun 202691 flights82.4%

Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, UA 2087 did best on Tuesday at 89.6% on time and worst on Saturday at 65.2%. Each day rests on about 49 flights, so a gap of 24 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 2087 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 46% of the 3,480 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.

Late-arriving aircraft
46%
Carrier
33%
National Airspace System
20%

46% 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 3,480 reported delay minutes here, that single category outweighs weather by 46 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 3,480 delay minutes reported on UA 2087.

Cancellations are rare at 0.59%, 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

5.7% 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 roughly 50 minutes, which a normal layover absorbs.

The 1,452 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.

The same number turns up on one other city pair in the data, including ORD to EWR (24), but none flew often enough under UA 2087 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to IAD only.

One caution: this is a thin sample. 341 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 2087

For a booking, read UA 2087 as 80.1% on time with 0.59% cancelled over 341 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