Flight number record
UA 2277
United Airlines · Washington to Tampa
- Route
- IAD → TPA
- Departs
- 12:50
- Flights
- 352
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 2277, check with United Airlines.
UA 2277 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 352 flights, with a median arrival 8 minutes early.
Set against the rest of the country, UA 2277's record is 10 points better than the US average of 77.6%. That gap is worth roughly 95 fewer late arrivals for every thousand flights.
Key figures
On time
87.1%
Arrivals under 15 minutes late, of 350 completed flights
Avg delay
64 min
Across delayed arrivals only, not all flights
Cancelled
0.28%
National rate is 1.81%
1 hour+ late
3.4%
National rate is 8.1%
These figures cover 352 flights between July 2025 and June 2026. The median arrival is 8 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Schedule
When UA 2277 flies
UA 2277 flies IAD to TPA without a single fixed slot. Its most common scheduled departure was 12:50, used on 118 of 352 flights, with 12:40 (59 flights) and 12:49 (58 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 12:50118 flights33.5%
- Departs 12:4059 flights16.8%
- Departs 12:4958 flights16.5%
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 12:50 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and UA 2277 runs 8 points better at 87.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
UA 2277 next to IAD to TPA
Every carrier on IAD to TPA combined arrived on time 81.2% of the time across 1,366 flights, so UA 2277 is 6 points ahead of it. United flew 1,180 flights on the same city pair under all its flight numbers, including this one, and those ran 82.2% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2277thin sample | 352 | 87.1% | 64 min | 0.28% | A+ |
| All United Airlines on IAD–TPA | 1,180 | 82.2% | 67 min | 0.42% | B+ |
| All carriers on IAD–TPA | 1,366 | 81.2% | 69 min | 0.88% | B+ |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 2277 quarter by quarter
Quarter by quarter UA 2277 held fairly steady: 87.2% in Jul–Sep 2025, 91.3% in Oct–Dec 2025, 82.0% in Jan–Mar 2026 and 87.9% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202579 flights87.2%
- Oct–Dec 202592 flights91.3%
- Jan–Mar 202690 flights82.0%
- Apr–Jun 202691 flights87.9%
Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, UA 2277 did best on Tuesday at 94.2% on time and worst on Monday at 79.6%. Each day rests on about 50 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Delay causes
Why UA 2277 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 46% of the 2,881 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.
- 46%Late-arriving aircraft
- 37%National Airspace System
- 16%Carrier
- 1%Extreme weather
46% 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 2,881 reported delay minutes here, that single category outweighs weather by 36 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 2,881 delay minutes reported on UA 2277.
Cancellations are rare at 0.28%, 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
Badly late arrivals are rare here: only 3.4% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 811 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 three other city pairs in the data, including ORD to IAD (125), TPA to EWR (17) and LAX to ORD (16), but none flew often enough under UA 2277 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAD to TPA only.
One caution: this is a thin sample. 352 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 2277
For a booking, UA 2277 has one of the better records a US domestic flight can show: 87.1% on time and 0.28% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- IAD to TPA, every carrier and departure
- TPA to IAD, the return direction
- United Airlines 1140 on the same route70.6%
- United Airlines 683 on the same route90.6%
- Washington Dulles International (IAD) delay statistics
- Tampa International (TPA) 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.