Flight number record
UA 1443
United Airlines · Washington to Charlotte Amalie
- Route
- IAD → STT
- Departs
- 08:15
- Flights
- 300
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1443, check with United Airlines.
UA 1443 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 77.3%. When something does go wrong the average delay runs about 40 minutes. That rests on 300 flights, with a median arrival 12 minutes early.
Set against the rest of the country, UA 1443's record is 10 points better than the US average of 77.3%. That gap is worth roughly 99 fewer late arrivals for every thousand flights.
Key figures
On time
87.2%
Arrivals under 15 minutes late, of 298 completed flights
Avg delay
40 min
Across delayed arrivals only, not all flights
Cancelled
0.67%
National rate is 1.89%
1 hour+ late
2.0%
National rate is 8.3%
These figures cover 300 flights between September 2025 and August 2026. The median arrival is 12 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 1443 flies
UA 1443 flies IAD to STT without a single fixed slot. Its most common scheduled departure was 08:15, used on 161 of 300 flights, with 08:59 (116 flights) next.
- Departs 08:15161 flights53.7%
- Departs 08:59116 flights38.7%
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 08:15 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and UA 1443 runs 3 points better at 87.2%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
UA 1443 next to IAD to STT
Every carrier on IAD to STT combined arrived on time 88.1% of the time across 331 flights, so UA 1443 is about level with it. Across its whole network United Airlines managed 78.8%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1443thin sample | 300 | 87.2% | 40 min | 0.67% | A+ |
| All United Airlines on IAD–STTthin sample | 331 | 88.1% | 40 min | 0.91% | A+ |
| All carriers on IAD–STTthin sample | 331 | 88.1% | 40 min | 0.91% | A+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1443 quarter by quarter
UA 1443 did not run the same all year. Its best quarter was Apr–Jun 2026 at 97.8% on time and its weakest Jul–Sep 2026 at 75.0%, a swing of 23 points on roughly 75 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 20254 flights—
- Oct–Dec 202571 flights81.7%
- Jan–Mar 202690 flights86.4%
- Apr–Jun 202691 flights97.8%
- Jul–Sep 202644 flights75.0%
Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1443 did best on Tuesday at 95.1% on time and worst on Saturday at 82.4%. Each day rests on about 43 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1443 runs when it is late
UA 1443 often beats the schedule: 125 of 298 completed flights, 42%, arrived 15 minutes or more early. Most of the lateness is short. 20 of the 38 late arrivals were under half an hour behind, and 6 reached an hour or more.
- 15+ min early125 flights41.9%
- Within 15 min135 flights45.3%
- 15–29 min late20 flights6.7%
- 30–59 min late12 flights4.0%
- 1–2 hours late5 flights1.7%
- 2+ hours late1 flights0.3%
Scale runs 0% to 100%.
Share of 298 completed flights by arrival against schedule.
A late pushback is often recovered here: of 24 departures that left 15 minutes late or more, 8 still arrived on time. In the other direction, 22 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at STT.
The worst days
Worst days for UA 1443
The latest arrival of the period was on 8 November 2025, 2 hours 26 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 8 November 2025 | 2 hours 26 minutes | National Airspace System |
| 14 March 2026 | 1 hour 44 minutes | Carrier |
| 14 December 2025 | 1 hour 33 minutes | National Airspace System |
| 26 January 2026 | 1 hour 24 minutes | National Airspace System |
| 16 March 2026 | 1 hour 14 minutes | National Airspace System |
Delay causes
Why UA 1443 runs late
National Airspace System accounts for 73% of the 1,530 delay minutes carriers reported here, and the remaining four split what is left.
- 73%National Airspace System
- 21%Carrier
- 4%Late-arriving aircraft
- 2%Extreme weather
73% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 1,119 minutes out of 1,530, against a national NAS share of 21%. The split is drawn from 1,530 delay minutes reported on UA 1443.
Cancellations are rare at 0.67%, 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 2.0% 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.
At 1,606 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 300 flights under UA 1443 in the data flew IAD to STT. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 300 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 1443
For a booking, UA 1443 has one of the better records a US domestic flight can show: 87.2% on time and 0.67% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- 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
- Worst months to fly in the US, ranked by the data
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.