Flight profile · United Airlines
UA2125
Nashville (BNA) to Washington (IAD) · scheduled 1:30 PM – 4:20 PM
How UA2125 performs
1,081 operations, July 2023 – July 2026.
UA2125 arrived on time 79.3% of the time, against 80.9% for all BNA → IAD flights, so this departure is 1.6 percentage points worse than the route as a whole. Against United Airlines’ own flights on this route it is 1.6 points worse.
Source: US DOT Bureau of Transportation Statistics · 1,081 operations, July 2023 – July 2026 · If UA2125 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where UA2125 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 |
|---|---|---|---|---|---|
| UA2125 | 79.3% | 0.56% | -2 min | 8.2% | 1,081 |
| United Airlines on BNA → IAD | 80.9% | 0.90% | -5 min | 7.5% | 2,785 |
| All BNA → IAD flights | 80.9% | 0.86% | -5 min | 7.6% | 3,027 |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
Why UA2125 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for UA2125 on BNA → IAD. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies UA2125 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, UA2125 pushed back an average of 79 minutes late; when it came in on time or early, an average of 0 minutes late.
Each departure is matched to the flight the same aircraft flew into BNA just before it, using the tail number in the DOT file, 1,047 of 1,075 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 | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| UA2125 | 14% | 75% | 7% |
| Network, same turn | 17% | 68% | 9% |
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 UA2125’s aircraft landed 15 or more minutes late is lower than the network’s and, once the aircraft was late, how often UA2125 left 15 or more minutes late is higher than the network’s.
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 July 2023 – July 2026
From pushback to gate
When it leaves BNA late, does that still matter by the time it reaches IAD?
On arrival at IAD, UA2125 spends 9.0 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 1.5 minutes longer than a typical IAD arrival (7.5 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 IAD. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 18,089 departures from BNA scheduled in the clock hour UA2125 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at IAD (169,930 flights), not just UA2125’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
The hour it leaves BNA
Part of any flight’s record belongs to the clock rather than to the flight. UA2125 has one departure time, so this is what that time is worth.
On-time arrival rate. 18,089 departures from BNA are scheduled in the 1 PM–2 PM hour over the period, against 319,645 across the whole day.
UA2125 is scheduled out of BNA at 1:30 PM, in the 1 PM–2 PM bank. Departures from BNA in that hour arrive on time 77.2% of the time against 78.3% across the airport’s whole day, so the hour UA2125 leaves in is an ordinary one for BNA and explains nothing about its record either way.
The two airport figures cover every departure from BNA 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 · July 2023 – July 2026 · Hours below 120 departures are not scored.
By day of week
Does UA2125 run worse on particular days?
Tuesday is historically the most reliable day and Friday the least, a gap of 5.7 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Days with fewer than 120 operations are not scored.
Other routes UA2125 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 |
|---|---|---|---|
| PHX→IAH Phoenix to Houston | December 18, 2025 – January 5, 2026 | 17 | — |
| SFO→ORD San Francisco to Chicago | January 3, 2026 | 1 | — |
| IAH→IAD Houston to Washington | December 18, 2025 | 1 | — |
| IAD→LAX Washington to Los Angeles | September 26, 2025 – October 24, 2025 | 28 | — |
| IAH→ORD Houston to Chicago | December 19, 2024 – January 6, 2025 | 19 | — |
| ORD→LAX Chicago to Los Angeles | December 19, 2024 – January 6, 2025 | 19 | — |
| TPA→IAH Tampa to Houston | December 19, 2024 – January 6, 2025 | 19 | — |
| IAH→BNA Houston to Nashville | July 1, 2023 – December 2, 2024 | 97 | 80.2% |
| DTW→IAD Detroit to Washington | September 6–8, 2024 | 2 | — |
| IAH→DTW Houston to Detroit | September 6–8, 2024 | 2 | — |
| ORD→BNA Chicago to Nashville | October 1–28, 2023 | 27 | — |
| IAD→CLT Washington to Charlotte | August 1, 2023 – September 4, 2023 | 35 | — |
Because the same number has served different journeys, the statistics above describe only the route UA2125 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.
43 min late
against a median of 2 min early
Percentiles over 1,081 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Data and methodology
Calculated by FlyerIntel from 1,081 records of UA2125 operating BNA → IAD, 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