Flight number record

UA 2012

United Airlines · Baltimore to Denver

Route: BWI → DEN
Departs: 16:20
Flights: 328
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 2012, check with United Airlines.

UA 2012 sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 328 flights, with a median arrival 3 minutes early.

On time

75.1%

Arrivals under 15 minutes late, of 325 completed flights

Avg delay

79 min

Across delayed arrivals only, not all flights

Cancelled

0.61%

National rate is 1.81%

1 hour+ late

8.9%

National rate is 8.1%

These figures cover 328 flights between July 2025 and June 2026. Beyond the headline rate, 8.9% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When UA 2012 flies

UA 2012 flies BWI to DEN without a single fixed slot. Its most common scheduled departure was 16:20, used on 83 of 328 flights, with 16:23 (41 flights) and 16:10 (40 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 16:2083 flights25.3%
Departs 16:2341 flights12.5%
Departs 16:1040 flights12.2%

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 16:20 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and UA 2012 runs 3 points better at 75.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

UA 2012 next to BWI to DEN

Every carrier on BWI to DEN combined arrived on time 75.6% of the time across 2,867 flights, so UA 2012 is about level with it. United flew 902 flights on the same city pair under all its flight numbers, including this one, and those ran 85.6% on time. Across its whole network United Airlines managed 79.0%, which this flight trails by 4 points.

UA 2012 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 2012thin sample	328	75.1%	79 min	0.61%	B+
All United Airlines on BWI–DEN	902	85.6%	77 min	0.55%	A+
All carriers on BWI–DEN	2,867	75.6%	59 min	1.12%	B
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 2012 quarter by quarter

UA 2012 did not run the same all year. Its best quarter was Oct–Dec 2025 at 81.8% on time and its weakest Jul–Sep 2025 at 63.3%, a swing of 19 points on roughly 82 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 flights63.3%
Oct–Dec 202555 flights81.8%
Jan–Mar 202690 flights77.5%
Apr–Jun 202691 flights80.2%

Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, UA 2012 did best on Tuesday at 87.2% on time and worst on Monday at 69.6%. Each day rests on about 47 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 2012 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 6,402 reported delay minutes.

National Airspace System
42%
Extreme weather
25%
Late-arriving aircraft
25%
Carrier
9%

Extreme weather accounts for 25% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 4.0 times the usual weather exposure. The split is drawn from 6,402 delay minutes reported on UA 2012.

Cancellations are rare at 0.61%, 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

8.9% 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 a little over an hour, which a normal layover absorbs.

The 1,491 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 ONT to SFO (37), but none flew often enough under UA 2012 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BWI to DEN only.

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.

What to do with this

Booking UA 2012

For a booking, read UA 2012 as 75.1% on time with 0.61% 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