Flight profile · United Airlines
UA1077
Chicago (ORD) to Washington (DCA) · scheduled 6:00 AM – 8:58 AM
How UA1077 performs
615 operations, August 2024 – July 2026.
UA1077 arrived on time 90.0% of the time, against 73.0% for all ORD → DCA flights, so this departure is 17.0 percentage points better than the route as a whole. Against United Airlines’ own flights on this route it is 15.4 points better.
UA1077’s scheduled departure has moved during the period FlyerIntel has on file: it typically left around 6:30 AM earlier on, and around 6:00 AM more recently — a 30-minute shift, not the few minutes of day-to-day rounding every published schedule carries. Confirm the current departure time before booking around an older listing.
Source: US DOT Bureau of Transportation Statistics · 615 operations, August 2024 – July 2026 · If UA1077 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
What stands out
How UA1077 compares to other flight numbers, not just to itself.
This flight runs unusually far ahead of the ORD → DCA route as a whole, better than 99% of 11,788 comparable flight numbers.
90.0% on time for this specific departure, against 73.0% for every ORD → DCA flight.
Source: FlyerIntel analysis of US DOT BTS data · August 2024 – July 2026 · The one thing about this specific departure that ranks most extreme against every other published flight number, out of everything FlyerIntel checks — shown only when something clears a real statistical bar, not for every flight.
Where UA1077 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
Ask for the position of UA1077 right now, if receivers on the ground are hearing it. Nothing is requested until you press the button.
Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| UA1077 | 90.0% | 1.30% | -12 min | 1.3% | 615 |
| United Airlines on ORD → DCA | 74.6% | 1.63% | -4 min | 9.4% | 10,323 |
| All ORD → DCA flights | 73.0% | 2.28% | -3 min | 10.6% | 20,159 |
Source: FlyerIntel analysis of US DOT BTS data · August 2024 – July 2026
Why UA1077 runs late
Where US DOT attributed the delay minutes on this flight.
airspace and airport capacity, including weather-driven flow control
crew, maintenance, boarding and fueling, all within the carrier’s 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 UA1077 on ORD → DCA. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering August 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies UA1077 comes in late, and what that does to the departure.
UA1077 is usually the aircraft’s first flight of the day: the schedule gives it a median of 8.9 hours on the ground at ORD, so its “inbound” is mostly the aircraft’s arrival the evening before.
When the aircraft came in 15 or more minutes late, UA1077 pushed back an average of 3 minutes early; when it came in on time or early, an average of 3 minutes early.
Each departure is matched to the flight the same aircraft flew into ORD just before it, using the tail number in the DOT file, 440 of 608 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 |
|---|---|---|---|
| UA1077 | 32% | 6% | 6% |
| Network, same turn | 29% | 12% | 9% |
A night on the ground absorbs most of a late arrival, so a late inbound matters far less on a turn this long than on a same-day one.
The network row is every flight with a scheduled turn of 6 hours or more, usually overnight. How often UA1077’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often UA1077 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 August 2024 – July 2026
From pushback to gate
When it leaves ORD late, does that still matter by the time it reaches DCA?
UA1077 pushes back an average of 2.0 minutes early and reaches the gate at DCA an average of 7.4 minutes early. The 5.4 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 19.6 minutes on the taxiways at ORD is about what any departure from the airport in that hour spends.
On arrival at DCA, UA1077 spends 4.1 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 3.5 minutes shorter than a typical DCA arrival (7.6 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 DCA. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 28,919 departures from ORD scheduled in the clock hour UA1077 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at DCA (435,126 flights), not just UA1077’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · August 2024 – July 2026
The hour it leaves ORD
Part of any flight’s record belongs to the clock rather than to the flight. UA1077 has one departure time, so this is what that time is worth.
On-time arrival rate. 28,919 departures from ORD are scheduled in the 6 AM–7 AM hour over the period, against 952,802 across the whole day.
UA1077 is scheduled out of ORD at 6:00 AM, in the 6 AM–7 AM bank. Departures from ORD in that hour arrive on time 87.3% of the time against 74.5% across the airport’s whole day — the slot alone is worth 12.8 points better before anything about this particular flight is considered.
The two airport figures cover every departure from ORD 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 · August 2024 – July 2026 · Hours below 120 departures are not scored.
Other routes UA1077 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 |
|---|---|---|---|
| SAT→IAH San Antonio to Houston | July 4, 2026 | 1 | — |
| IAH→RNO Houston to Reno | May 23, 2026 – June 20, 2026 | 5 | — |
| ORF→IAH Norfolk to Houston | June 6–20, 2026 | 3 | — |
| SYR→ORD Syracuse to Chicago | May 2–16, 2026 | 3 | — |
| SAT→DEN San Antonio to Denver | March 7–28, 2026 | 4 | — |
| DCA→IAH Washington to Houston | October 26, 2025 – February 11, 2026 | 108 | 84.9% |
| DCA→BTR Washington to Baton Rouge | February 1, 2026 | 1 | — |
| IAH→FCA Houston to Kalispell | June 14, 2025 – August 16, 2025 | 10 | — |
| IAH→DFW Houston to Dallas–Fort Worth | May 24, 2025 – June 7, 2025 | 3 | — |
| IAH→SAT Houston to San Antonio | June 27, 2024 – August 18, 2024 | 51 | — |
| STL→EWR St. Louis to Newark | May 23, 2024 – June 26, 2024 | 35 | — |
| EWR→MSP Newark to Minneapolis | May 2–22, 2024 | 21 | — |
| EWR→SYR Newark to Syracuse | March 31, 2024 – May 1, 2024 | 32 | — |
| EWR→IAH Newark to Houston | November 28, 2023 – March 30, 2024 | 115 | 80.4% |
| IAH→PIT Houston to Pittsburgh | March 8, 2024 | 1 | — |
| SAT→EWR San Antonio to Newark | January 13, 2024 – February 10, 2024 | 5 | — |
| SFO→ORD San Francisco to Chicago | December 13, 2023 | 1 | — |
| DEN→SEA Denver to Seattle | September 5, 2023 – November 27, 2023 | 83 | — |
| SEA→EWR Seattle to Newark | October 1, 2023 | 1 | — |
| IAH→OMA Houston to Omaha | July 1, 2023 – September 4, 2023 | 66 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1077 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.
14 min late
against a median of 12 min early
Percentiles over 615 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering August 2024 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| UA1077 this flight | United Airlines | 90.0% | 12 min early | 615 |
| AA523 | American Airlines | 84.9% | 7 min early | 665 |
| AA2345 | American Airlines | 74.4% | 4 min early | 633 |
| UA1097 | United Airlines | 73.1% | 3 min early | 648 |
| AA903 | American Airlines | 61.5% | 2 min late | 948 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. UA1077 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 615 records of UA1077 operating ORD → DCA, 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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