Flight profile · United Airlines
UA1046
Atlanta (ATL) to Chicago (ORD) · scheduled 6:59 PM – 8:24 PM
How UA1046 performs
939 operations, July 2023 – July 2026.
UA1046 arrived on time 68.2% of the time, against 74.1% for all ATL → ORD flights, so this departure is 5.9 percentage points worse than the route as a whole. Against United Airlines’ own flights on this route it is 11.4 points worse.
Source: US DOT Bureau of Transportation Statistics · 939 operations, July 2023 – July 2026 · If UA1046 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 UA1046 compares to other flight numbers, not just to itself.
Which day you fly matters unusually much here, a wider weekday spread than 92% of 1,710 comparable flight numbers.
78.4% on time on a typical Tuesday, against 60.7% on a Thursday.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – 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 UA1046 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 UA1046 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 |
|---|---|---|---|---|---|
| UA1046 | 68.2% | 1.70% | 4 min | 12.3% | 939 |
| United Airlines on ATL → ORD | 79.6% | 1.24% | -5 min | 7.9% | 4,914 |
| All ATL → ORD flights | 74.1% | 1.68% | -3 min | 9.5% | 18,588 |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
Why UA1046 runs late
Where US DOT attributed the delay minutes on this flight.
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for UA1046 on ATL → ORD. 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 UA1046 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, UA1046 pushed back an average of 63 minutes late; when it came in on time or early, an average of 3 minutes late.
Each departure is matched to the flight the same aircraft flew into ATL just before it, using the tail number in the DOT file, 893 of 923 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 |
|---|---|---|---|
| UA1046 | 23% | 56% | 8% |
| Network, same turn | 17% | 68% | 9% |
The schedule leaves a normal turn: enough time to clean and board if the aircraft is on time, little to spare if it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often UA1046’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often UA1046 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 ATL late, does that still matter by the time it reaches ORD?
UA1046 pushes back an average of 20.7 minutes late and arrives a further 4.9 minutes behind that. This departure loses ground between the two gates rather than recovering it, so a late pushback here tends to get worse on the way, not better. It spends 20.5 minutes on the taxiways at ATL, 3.5 minutes longer than a typical ATL departure in the same hour.
On arrival at ORD, UA1046 spends 24.5 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 6.7 minutes longer than a typical ORD arrival (17.8 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 ORD. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 48,346 departures from ATL scheduled in the clock hour UA1046 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at ORD (952,666 flights), not just UA1046’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
The hour it leaves ATL
Part of any flight’s record belongs to the clock rather than to the flight. UA1046 has one departure time, so this is what that time is worth.
On-time arrival rate. 48,346 departures from ATL are scheduled in the 6 PM–7 PM hour over the period, against 1,012,247 across the whole day.
UA1046 is scheduled out of ATL at 6:59 PM, in the 6 PM–7 PM bank. Departures from ATL in that hour arrive on time 71.1% of the time against 78.7% across the airport’s whole day — the slot alone is worth 7.6 points worse before anything about this particular flight is considered.
The two airport figures cover every departure from ATL 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 UA1046 run worse on particular days?
Tuesday is historically the most reliable day and Thursday the least, a gap of 17.7 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 UA1046 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 |
|---|---|---|---|
| PBI→ORD West Palm Beach to Chicago | March 7–28, 2026 | 4 | — |
| ORD→MSP Chicago to Minneapolis | December 18, 2025 – January 5, 2026 | 17 | — |
| OKC→IAH Oklahoma City to Houston | December 24–31, 2025 | 2 | — |
| SFO→ATL San Francisco to Atlanta | December 2–17, 2025 | 16 | — |
| ORD→PIT Chicago to Pittsburgh | March 8–29, 2025 | 4 | — |
| ORD→EYW Chicago to Key West | December 24, 2024 – January 4, 2025 | 12 | — |
| ORD→IND Chicago to Indianapolis | December 3–18, 2024 | 16 | — |
| MSN→SFO Madison to San Francisco | August 18, 2024 | 1 | — |
| DRO→DEN Durango to Denver | May 23, 2024 – June 26, 2024 | 35 | — |
| ORD→SDF Chicago to Louisville | May 2–5, 2024 | 2 | — |
| ORD→PSP Chicago to Palm Springs | April 28, 2024 | 1 | — |
| FLL→DEN Fort Lauderdale to Denver | December 2–16, 2023 | 3 | — |
| ORD→SEA Chicago to Seattle | July 1, 2023 – November 26, 2023 | 88 | — |
| SEA→EWR Seattle to Newark | July 1, 2023 – September 4, 2023 | 66 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1046 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.
75 min late
against a median of 4 min late
UA1046 has an average that understates its risk: a typical arrival is 4 min late, but the worst tenth are 71 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 939 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 |
|---|---|---|---|---|
| DL1178 | Delta Air Lines | 88.3% | 5 min early | 916 |
| DL1147 | Delta Air Lines | 80.4% | 3 min early | 1,054 |
| UA516 | United Airlines | 78.3% | 6 min early | 989 |
| DL1199 | Delta Air Lines | 73.9% | 2 min early | 732 |
| DL1477 | Delta Air Lines | 72.4% | 0 min early | 977 |
| DL2738 | Delta Air Lines | 68.7% | 3 min late | 1,028 |
| UA1046 this flight | United Airlines | 68.2% | 4 min late | 939 |
| DL2879 | Delta Air Lines | 54.7% | 11 min late | 887 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. UA1046 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 939 records of UA1046 operating ATL → ORD, 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
Analysis last recomputed