Flight profile · United Airlines
UA2012
Baltimore (BWI) to Denver (DEN) · scheduled 4:10 PM – 6:20 PM
How UA2012 performs
783 operations, May 2024 – July 2026.
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.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| UA2012 | 75.9% | 0.77% | -4 min | 9.8% | 783 |
| United Airlines on BWI → DEN | 85.5% | 0.76% | -10 min | 5.1% | 2,890 |
| All BWI → DEN flights | 76.6% | 1.04% | -4 min | 7.0% | 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.
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
weather severe enough to stop this flight specifically
crew, maintenance, boarding and fueling, all within the carrier’s control
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.
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
| Share of departures | Inbound landed 15+ late |
|---|---|
| UA2012 | 13% |
| Network, same turn | 17% |
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?
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.
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.
| Route | Operated | Flights | On time |
|---|---|---|---|
| ONT→SFO Ontario to San Francisco | October 26, 2025 – December 1, 2025 | 37 | — |
| DEN→SBA Denver to Santa Barbara | November 1, 2024 – December 2, 2024 | 31 | — |
| EWR→TPA Newark to Tampa | February 15, 2024 – May 1, 2024 | 77 | — |
| TPA→SFO Tampa to San Francisco | March 31, 2024 – May 1, 2024 | 32 | — |
| MSN→EWR Madison to Newark | March 7–30, 2024 | 24 | — |
| TPA→IAH Tampa to Houston | March 7–30, 2024 | 24 | — |
| ORD→PBI Chicago to West Palm Beach | December 21, 2023 – February 14, 2024 | 52 | — |
| EWR→SFO Newark to San Francisco | November 28, 2023 – December 20, 2023 | 23 | — |
| CLE→ORD Cleveland to Chicago | October 30, 2023 – November 27, 2023 | 28 | — |
| LAX→IAH Los Angeles to Houston | September 29, 2023 – October 28, 2023 | 30 | — |
| IAD→ORF Washington to Norfolk | July 3, 2023 – September 28, 2023 | 61 | — |
| PWM→IAD Portland to Washington | July 1, 2023 – September 4, 2023 | 66 | — |
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.
58 min late
against a median of 4 min early
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.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| UA2412 | United Airlines | 89.5% | 9 min early | 622 |
| UA2012 this flight | United Airlines | 75.9% | 4 min early | 783 |
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