Flight number record
UA 2277
United Airlines · Washington to Tampa
- Route
- IAD → TPA
- Departs
- 12:50
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2277, check with United Airlines.
UA 2277 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 365 flights, with a median arrival 7 minutes early.
Set against the rest of the country, UA 2277's record is 8 points better than the US average of 77.3%. That gap is worth roughly 84 fewer late arrivals for every thousand flights.
Key figures
On time
85.7%
Arrivals under 15 minutes late, of 364 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
0.27%
National rate is 1.89%
1 hour+ late
4.1%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 7 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.
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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 365 flights, with 12:49 (88 flights) and 12:40 (45 flights) next.
- Departs 12:50118 flights32.3%
- Departs 12:4988 flights24.1%
- Departs 12:4045 flights12.3%
Scale runs 0% to 100%.
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 78.3%, and UA 2277 runs 7 points better at 85.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
UA 2277 next to IAD to TPA
Every carrier on IAD to TPA combined arrived on time 83.8% of the time across 1,287 flights, so UA 2277 is 2 points ahead of it. United flew 1,109 flights on the same city pair under all its flight numbers, including this one, and those ran 83.6% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2277 | 365 | 85.7% | 63 min | 0.27% | A+ |
| All United Airlines on IAD–TPA | 1,109 | 83.6% | 69 min | 0.45% | B+ |
| All carriers on IAD–TPA | 1,287 | 83.8% | 70 min | 0.78% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2277 quarter by quarter
UA 2277 did not run the same all year. Its best quarter was Oct–Dec 2025 at 91.3% on time and its weakest Jul–Sep 2026 at 77.4%, a swing of 14 points on roughly 73 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights90.0%
- Oct–Dec 202592 flights91.3%
- Jan–Mar 202690 flights82.0%
- Apr–Jun 202691 flights87.9%
- Jul–Sep 202662 flights77.4%
Scale runs 70% to 95%.
By weekday, UA 2277 ranged from 80.8% on Friday to 90.4% on Tuesday. With about 52 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late UA 2277 runs when it is late
UA 2277 often beats the schedule: 96 of 364 completed flights, 26%, arrived 15 minutes or more early. The 52 late arrivals split 22 under half an hour, 15 between 30 and 60 minutes, and 15 an hour or more.
- 15+ min early96 flights26.4%
- Within 15 min216 flights59.3%
- 15–29 min late22 flights6.0%
- 30–59 min late15 flights4.1%
- 1–2 hours late9 flights2.5%
- 2+ hours late6 flights1.6%
Scale runs 0% to 100%.
Share of 364 completed flights by arrival against schedule.
14 of 50 late departures made up the time and arrived on time, 28% of them. 16 flights left on time and still arrived late.
The worst days
Worst days for UA 2277
The latest arrival of the period was on 21 February 2026, 6 hours 59 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 February 2026 | 6 hours 59 minutes | Late-arriving aircraft |
| 28 June 2026 | 5 hours 13 minutes | Late-arriving aircraft |
| 16 March 2026 | 4 hours 55 minutes | National Airspace System |
| 12 March 2026 | 3 hours 18 minutes | Carrier |
| 1 September 2025 | 2 hours 23 minutes | Late-arriving aircraft |
Delay causes
Why UA 2277 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 3,294 reported delay minutes.
- 40%Late-arriving aircraft
- 38%National Airspace System
- 21%Carrier
- 1%Extreme weather
40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,294 reported delay minutes here, that single category outweighs weather by 35 to one. The split is drawn from 3,294 delay minutes reported on UA 2277.
Cancellations are rare at 0.27%, below the national 1.89% 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 4.1% land an hour or more behind schedule, against 8.3% 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.
The same number turns up on two other city pairs in the data, including ORD to IAD (156) 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. 365 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: 85.7% on time and 0.27% 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 route72.8%
- United Airlines 683 on the same route91.9%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.