Flight number record
UA 379
United Airlines · Washington to Orlando
- Route
- IAD → MCO
- Departs
- 08:30
- Flights
- 328
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 379, check with United Airlines.
UA 379 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 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 328 flights, with a median arrival 10 minutes early.
Set against the rest of the country, UA 379's record is 13 points better than the US average of 77.3%. That gap is worth roughly 125 fewer late arrivals for every thousand flights.
Key figures
On time
89.8%
Arrivals under 15 minutes late, of 322 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
1.52%
National rate is 1.89%
1 hour+ late
2.8%
National rate is 8.3%
These figures cover 328 flights between September 2025 and August 2026. The median arrival is 10 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 379 flies
UA 379 flies IAD to MCO without a single fixed slot. Its most common scheduled departure was 08:30, used on 80 of 328 flights, with 08:45 (68 flights) and 08:15 (43 flights) next.
- Departs 08:3080 flights24.4%
- Departs 08:4568 flights20.7%
- Departs 08:1543 flights13.1%
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 08:30 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and UA 379 runs 6 points better at 89.8%. 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 379 next to IAD to MCO
Every carrier on IAD to MCO combined arrived on time 80.7% of the time across 2,180 flights, so UA 379 is 9 points ahead of it. United flew 1,874 flights on the same city pair under all its flight numbers, including this one, and those ran 82.5% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 379thin sample | 328 | 89.8% | 58 min | 1.52% | A |
| All United Airlines on IAD–MCO | 1,874 | 82.5% | 69 min | 0.91% | B+ |
| All carriers on IAD–MCO | 2,180 | 80.7% | 76 min | 1.10% | B |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 379 quarter by quarter
UA 379 did not run the same all year. Its best quarter was Apr–Jun 2026 at 96.2% on time and its weakest Jul–Sep 2026 at 85.0%, a swing of 11 points on roughly 82 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 flights—
- Oct–Dec 202592 flights86.8%
- Jan–Mar 202665 flights87.3%
- Apr–Jun 202679 flights96.2%
- Jul–Sep 202662 flights85.0%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 379 ranged from 87.5% on Tuesday to 94.4% on Wednesday. With about 47 flights behind each day, a spread of 7 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late UA 379 runs when it is late
UA 379 often beats the schedule: 119 of 322 completed flights, 37%, arrived 15 minutes or more early. The 33 late arrivals split 16 under half an hour, 8 between 30 and 60 minutes, and 9 an hour or more.
- 15+ min early119 flights37.0%
- Within 15 min170 flights52.8%
- 15–29 min late16 flights5.0%
- 30–59 min late8 flights2.5%
- 1–2 hours late5 flights1.6%
- 2+ hours late4 flights1.2%
Scale runs 0% to 100%.
Share of 322 completed flights by arrival against schedule.
6 of 25 late departures made up the time and arrived on time, 24% of them. 14 flights left on time and still arrived late.
The worst days
Worst days for UA 379
The latest arrival of the period was on 13 February 2026, 6 hours 22 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 February 2026 | 6 hours 22 minutes | Carrier |
| 14 March 2026 | 3 hours 8 minutes | Carrier |
| 26 January 2026 | 2 hours 9 minutes | National Airspace System |
| 12 July 2026 | 2 hours 5 minutes | Carrier |
| 1 January 2026 | 1 hour 40 minutes | Carrier |
Delay causes
Why UA 379 runs late
Carrier accounts for 52% of the 1,906 delay minutes carriers reported here, and the remaining four split what is left.
- 52%Carrier
- 36%National Airspace System
- 10%Late-arriving aircraft
- 2%Extreme weather
The largest share of delay minutes, 52%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 999 of the 1,906 delay minutes reported here. The split is drawn from 1,906 delay minutes reported on UA 379.
Cancellations sit at 1.52% against a national 1.89%, which is ordinary. Diversions add another 0.30%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.8% 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 758 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 seven other city pairs in the data, including CVG to IAD (17), ORD to PDX (6) and IAD to CHS (4), but none flew often enough under UA 379 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAD to MCO only.
One caution: this is a thin sample. 328 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 379
For a booking, read UA 379 as 89.8% on time with 1.52% cancelled over 328 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- IAD to MCO, every carrier and departure
- MCO to IAD, the return direction
- United Airlines 2463 on the same route72.1%
- United Airlines 2206 on the same route86.3%
- United Airlines 689 on the same route84.1%
- United Airlines 1926 on the same route90.0%
- Washington Dulles International (IAD) delay statistics
- Orlando International (MCO) 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.