Flight profile · United Airlines

UA2012

Baltimore (BWI) to Denver (DEN) · scheduled 4:10 PM – 6:20 PM

This page describes how UA2012 has historically performed, which is a different and more useful question when you are deciding what to book. The live position below is a reading from receivers on the ground, not flight status. For today’s status, check with United Airlines.

How UA2012 performs

783 operations, May 2024 – July 2026.

On-time arrivals
75.9%
586 of 772 completed
Cancellation rate
0.77%
6 cancelled
Median arrival delay
-4 min
Average 13.5 min
Severe delays
9.8%
Arrived 60+ minutes late
Delay when late
86 min
Average, when 15+ min late
Departure punctuality
80.4%
Left the gate on time

Source: US DOT Bureau of Transportation Statistics · 783 operations, May 2024 – July 2026 · If UA2012 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.

Where UA2012 is right now

A live reading, only if you ask for it. It is not part of the reliability record above.

Ask for the position of UA2012 right now, if receivers on the ground are hearing it. Nothing is requested until you press the button.

Against the rest of the route

Against the rest of the route
Flight or routeOn timeCancelledMedian delaySevereFlights
UA201275.9%0.77%-4 min9.8%783
United Airlines on BWI → DEN85.5%0.76%-10 min5.1%2,890
All BWI → DEN flights76.6%1.04%-4 min7.0%9,369

Source: FlyerIntel analysis of US DOT BTS data · May 2024 – July 2026

Why UA2012 runs late

Where US DOT attributed the delay minutes on this flight.

Share of the delay minutes US DOT attributed to each cause for UA2012 on BWI → DEN. Only delays of 15 minutes or more are attributed.

Source: US DOT Bureau of Transportation Statistics · Data covering May 2024 – July 2026

Does a late aircraft delay this flight?

How often the plane that flies UA2012 comes in late, and what that does to the departure.

Inbound aircraft late
13%
96 of 763 departures came in 15+ minutes late
Scheduled time on the ground
65 minutes
Median at BWI between the inbound and this departure

The aircraft flying UA2012 came in 15 or more minutes late on 13% of the departures where its previous flight is known. There are not enough departures in both groups to say how the flight left after a late one and after an on-time one.

Each departure is matched to the flight the same aircraft flew into BWI just before it, using the tail number in the DOT file, 763 of 777 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.

Against the network at the same turn length

UA2012 against all flights with a scheduled turn of 60 to 89 minutes
Share of departuresInbound landed 15+ late
UA201213%
Network, same turn17%

The schedule leaves a normal turn: enough time to clean and board if the aircraft is on time, little to spare if it is not.

The network row is every flight with a scheduled turn of 60 to 89 minutes. How often UA2012’s aircraft landed 15 or more minutes late is lower than the network’s. There are not enough departures in both groups to compare how it left.

More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.

Source: US DOT Bureau of Transportation Statistics · Data covering May 2024 – July 2026

From pushback to gate

When it leaves BWI late, does that still matter by the time it reaches DEN?

Leaves the gate
15.2 minutes late
Average over 777 pushbacks
Taxi out at BWI
15.9 min
15.0 min for the airport in this hour
Taxi in at DEN
11.8 min
9.8 min for a typical DEN arrival
Reaches the gate at DEN
13.5 minutes late
Average over 772 arrivals

On arrival at DEN, UA2012 spends 11.8 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 2.0 minutes longer than a typical DEN arrival (9.8 min).

Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached DEN. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 15,545 departures from BWI scheduled in the clock hour UA2012 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at DEN (963,027 flights), not just UA2012’s own. More on taxi time.

Source: FlyerIntel analysis of US DOT BTS data · May 2024 – July 2026

The hour it leaves BWI

Part of any flight’s record belongs to the clock rather than to the flight. UA2012 has one departure time, so this is what that time is worth.

UA201275.9%
All BWI departures, 4 PM–5 PM70.1%
All BWI departures, whole day76.0%

On-time arrival rate. 15,545 departures from BWI are scheduled in the 4 PM–5 PM hour over the period, against 299,178 across the whole day.

UA2012 is scheduled out of BWI at 4:10 PM, in the 4 PM–5 PM bank. Departures from BWI in that hour arrive on time 70.1% of the time against 76.0% across the airport’s whole day — the slot alone is worth 5.9 points worse before anything about this particular flight is considered.

The two airport figures cover every departure from BWI to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.

Source: FlyerIntel analysis of US DOT BTS data · May 2024 – July 2026 · Hours below 120 departures are not scored.

Other routes UA2012 has flown

A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.

Other routes UA2012 has flown
RouteOperatedFlightsOn time
ONT→SFO Ontario to San FranciscoOctober 26, 2025 – December 1, 202537—
DEN→SBA Denver to Santa BarbaraNovember 1, 2024 – December 2, 202431—
EWR→TPA Newark to TampaFebruary 15, 2024 – May 1, 202477—
TPA→SFO Tampa to San FranciscoMarch 31, 2024 – May 1, 202432—
MSN→EWR Madison to NewarkMarch 7–30, 202424—
TPA→IAH Tampa to HoustonMarch 7–30, 202424—
ORD→PBI Chicago to West Palm BeachDecember 21, 2023 – February 14, 202452—
EWR→SFO Newark to San FranciscoNovember 28, 2023 – December 20, 202323—
CLE→ORD Cleveland to ChicagoOctober 30, 2023 – November 27, 202328—
LAX→IAH Los Angeles to HoustonSeptember 29, 2023 – October 28, 202330—
IAD→ORF Washington to NorfolkJuly 3, 2023 – September 28, 202361—
PWM→IAD Portland to WashingtonJuly 1, 2023 – September 4, 202366—

Because the same number has served different journeys, the statistics above describe only the route UA2012 currently operates. Blending them would produce an average of two different flights.

When it goes wrong

The average describes a usual day. This is the day that ruins a connection.

One arrival in ten is worse than

58 min late

against a median of 4 min early

Arrived an hour or more late9.8%
Typical delay when late86 min
Cancelled0.77%
Landed somewhere else0.64%

UA2012 has an average that understates its risk: a typical arrival is 4 min early, but the worst tenth are 62 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.

Percentiles over 783 operations; cancelled and diverted flights are counted separately.

Source: US DOT Bureau of Transportation Statistics · Data covering May 2024 – July 2026

Other flights on this route

Same airports, same journey, different odds of arriving on time.

Other flights on this route
FlightAirlineOn timeMedian arrivalOperations
UA2412United Airlines89.5%9 min early622
UA2012 this flightUnited Airlines75.9%4 min early783

Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. UA2012 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.

Data and methodology

Calculated by FlyerIntel from 783 records of UA2012 operating BWI → DEN, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.

Full methodology · Data sources · Report a problem

Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air

Analysis last recomputed