Flight profile · United Airlines
UA379
Washington (IAD) to Orlando (MCO) · scheduled 8:15 AM – 10:55 AM
How UA379 performs
1,037 operations, July 2023 – July 2026.
UA379 arrived on time 82.8% of the time, against 78.1% for all IAD → MCO flights, so this departure is 4.7 percentage points better than the route as a whole. Against United Airlines’ own flights on this route it is 3.8 points better.
Source: US DOT Bureau of Transportation Statistics · 1,037 operations, July 2023 – July 2026 · If UA379 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where UA379 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| UA379 | 82.8% | 1.16% | -8 min | 4.8% | 1,037 |
| United Airlines on IAD → MCO | 79.0% | 1.13% | -7 min | 8.3% | 5,463 |
| All IAD → MCO flights | 78.1% | 1.22% | -7 min | 8.7% | 5,967 |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
Why UA379 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for UA379 on IAD → MCO. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies UA379 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, UA379 pushed back an average of 15 minutes late; when it came in on time or early, an average of 4 minutes late.
Each departure is matched to the flight the same aircraft flew into IAD just before it, using the tail number in the DOT file, 873 of 1,026 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| UA379 | 16% | 33% | 9% |
| Network, same turn | 23% | 40% | 9% |
The schedule leaves a long gap on the ground, which gives a late aircraft room to catch up before this flight pushes back.
The network row is every flight with a scheduled turn of 90 minutes to 3 hours. How often UA379’s aircraft landed 15 or more minutes late is lower than the network’s and, once the aircraft was late, how often UA379 left 15 or more minutes late is lower than the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
From pushback to gate
When it leaves IAD late, does that still matter by the time it reaches MCO?
UA379 pushes back an average of 6.9 minutes late and reaches the gate at MCO an average of 2.5 minutes late. The 4.4 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. Its 21.9 minutes on the taxiways at IAD is about what any departure from the airport in that hour spends.
On arrival at MCO, UA379 spends 9.2 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 1.7 minutes shorter than a typical MCO arrival (10.9 min).
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached MCO. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 32,899 departures from IAD scheduled in the clock hour UA379 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at MCO (498,229 flights), not just UA379’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
The hour it leaves IAD
Part of any flight’s record belongs to the clock rather than to the flight. UA379 has one departure time, so this is what that time is worth.
On-time arrival rate. 32,899 departures from IAD are scheduled in the 8 AM–9 AM hour over the period, against 170,208 across the whole day.
UA379 is scheduled out of IAD at 8:15 AM, in the 8 AM–9 AM bank. Departures from IAD in that hour arrive on time 88.0% of the time against 81.0% across the airport’s whole day — the slot alone is worth 7.1 points better before anything about this particular flight is considered.
The two airport figures cover every departure from IAD to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Hours below 120 departures are not scored.
By day of week
Does UA379 run worse on particular days?
Tuesday is historically the most reliable day and Saturday the least, a gap of 6.2 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Days with fewer than 120 operations are not scored.
Other routes UA379 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| SFO→BZN San Francisco to Bozeman | May 24, 2026 | 1 | — |
| SFO→ANC San Francisco to Anchorage | May 20, 2026 | 1 | — |
| SDF→SFO Louisville to San Francisco | April 30, 2026 | 1 | — |
| IAD→CHS Washington to Charleston | April 7–28, 2026 | 4 | — |
| CVG→IAD Cincinnati / Covington to Washington | March 6–28, 2026 | 17 | — |
| BNA→IAH Nashville to Houston | March 11–25, 2026 | 3 | — |
| ORD→PDX Chicago to Portland | February 17, 2026 – March 4, 2026 | 6 | — |
| BOS→LAX Boston to Los Angeles | May 22, 2025 | 1 | — |
| LAX→SEA Los Angeles to Seattle | May 22, 2025 | 1 | — |
| DEN→LAS Denver to Las Vegas | February 13, 2025 – March 5, 2025 | 21 | — |
| CLE→IAD Cleveland to Washington | January 8, 2024 | 1 | — |
| MCO→IAH Orlando to Houston | July 1, 2023 – November 27, 2023 | 98 | 88.8% |
| RDU→IAD Raleigh–Durham to Washington | July 5, 2023 – October 28, 2023 | 91 | 92.3% |
| ORF→IAD Norfolk to Washington | September 5–28, 2023 | 24 | — |
Because the same number has served different journeys, the statistics above describe only the route UA379 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
30 min late
against a median of 8 min early
Percentiles over 1,037 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| UA379 this flight | United Airlines | 82.8% | 8 min early | 1,037 |
| UA689 | United Airlines | 80.3% | 6 min early | 966 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. UA379 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 1,037 records of UA379 operating IAD → MCO, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
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