Flight number record
UA 2125
United Airlines · Nashville to Washington
- Route
- BNA → IAD
- Departs
- 13:30
- Flights
- 341
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 2125, check with United Airlines.
UA 2125 lands a B+, level with the national rate of 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 341 flights, with a median arrival right on schedule.
Key figures
On time
78.0%
Arrivals under 15 minutes late, of 336 completed flights
Avg delay
92 min
Across delayed arrivals only, not all flights
Cancelled
0.59%
National rate is 1.81%
1 hour+ late
10.1%
National rate is 8.1%
These figures cover 341 flights between July 2025 and June 2026. Beyond the headline rate, 10.1% 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 2125 flies
UA 2125 flies BNA to IAD without a single fixed slot. Its most common scheduled departure was 13:30, used on 122 of 341 flights, with 13:32 (90 flights) and 13:35 (72 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 13:30122 flights35.8%
- Departs 13:3290 flights26.4%
- Departs 13:3572 flights21.1%
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 13:30 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and UA 2125 runs level with that at 78.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
UA 2125 next to BNA to IAD
Every carrier on BNA to IAD combined arrived on time 78.1% of the time across 1,011 flights, so UA 2125 is about level with it. United flew 935 flights on the same city pair under all its flight numbers, including this one, and those ran 77.8% on time. Across its whole network United Airlines managed 79.0%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2125thin sample | 341 | 78.0% | 92 min | 0.59% | B+ |
| All United Airlines on BNA–IAD | 935 | 77.8% | 83 min | 1.28% | B |
| All carriers on BNA–IAD | 1,011 | 78.1% | 83 min | 1.19% | B |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 2125 quarter by quarter
Quarter by quarter UA 2125 held fairly steady: 75.6% in Jul–Sep 2025, 75.6% in Oct–Dec 2025, 76.9% in Jan–Mar 2026 and 83.3% in Apr–Jun 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202592 flights75.6%
- Oct–Dec 202578 flights75.6%
- Jan–Mar 202680 flights76.9%
- Apr–Jun 202691 flights83.3%
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, UA 2125 did best on Tuesday at 84.0% on time and worst on Monday at 68.8%. Each day rests on about 49 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Delay causes
Why UA 2125 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 54% of the 6,834 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.
- 54%Late-arriving aircraft
- 28%Carrier
- 13%National Airspace System
- 5%Extreme weather
54% 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 6,834 reported delay minutes here, that single category outweighs weather by 10 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 6,834 delay minutes reported on UA 2125.
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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.1% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
The 542 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 four other city pairs in the data, including IAD to LAX (28), PHX to IAH (17) and SFO to ORD (1), but none flew often enough under UA 2125 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BNA 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 2125
For a booking, read UA 2125 as 78.0% on time with 0.59% cancelled over 341 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- BNA to IAD, every carrier and departure
- IAD to BNA, the return direction
- United Airlines 1709 on the same route86.9%
- Nashville International (BNA) delay statistics
- Washington Dulles International (IAD) delay statistics
- United Airlines on-time record
- Every United Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
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.