Flight profile · United Airlines
UA426
Detroit (DTW) to Chicago (ORD) · scheduled 9:00 AM – 6:35 PM
How UA426 performs
997 operations, July 2023 – July 2026.
UA426 arrived on time 67.3% of the time, against 77.7% for all DTW → ORD flights, so this departure is 10.4 percentage points worse than the route as a whole. Against United Airlines’ own flights on this route it is 3.6 points worse.
Source: US DOT Bureau of Transportation Statistics · 997 operations, July 2023 – July 2026 · If UA426 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where UA426 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 |
|---|---|---|---|---|---|
| UA426 | 67.3% | 1.40% | 3 min | 8.8% | 997 |
| United Airlines on DTW → ORD | 70.9% | 1.33% | 0 min | 8.0% | 1,881 |
| All DTW → ORD flights | 77.7% | 1.93% | -6 min | 9.0% | 17,417 |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
Why UA426 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 UA426 on DTW → 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 UA426 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, UA426 pushed back an average of 36 minutes late; when it came in on time or early, an average of 1 minute late.
Each departure is matched to the flight the same aircraft flew into DTW just before it, using the tail number in the DOT file, 920 of 984 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 |
|---|---|---|---|
| UA426 | 22% | 54% | 7% |
| 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 UA426’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often UA426 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 DTW late, does that still matter by the time it reaches ORD?
UA426 pushes back an average of 12.2 minutes late and arrives a further 4.5 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 18.8 minutes on the taxiways at DTW, 1.2 minutes longer than a typical DTW departure in the same hour.
On arrival at ORD, UA426 spends 23.8 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 6.0 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 9,311 departures from DTW scheduled in the clock hour UA426 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 UA426’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
The hour it leaves DTW
Part of any flight’s record belongs to the clock rather than to the flight. UA426 has one departure time, so this is what that time is worth.
On-time arrival rate. 9,311 departures from DTW are scheduled in the 9 AM–10 AM hour over the period, against 388,632 across the whole day.
UA426 is scheduled out of DTW at 9:00 AM, in the 9 AM–10 AM bank. Departures from DTW in that hour arrive on time 84.7% of the time against 79.6% across the airport’s whole day — the slot alone is worth 5.1 points better before anything about this particular flight is considered.
The two airport figures cover every departure from DTW 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 UA426 run worse on particular days?
Tuesday is historically the most reliable day and Friday the least, a gap of 12.5 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 UA426 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 |
|---|---|---|---|
| ORD→MSY Chicago to New Orleans | March 5, 2026 – April 29, 2026 | 56 | — |
| SLC→DEN Salt Lake City to Denver | December 18, 2025 – January 5, 2026 | 19 | — |
| ORD→BWI Chicago to Baltimore | December 2–17, 2025 | 16 | — |
| ORD→IAD Chicago to Washington | October 26, 2025 – December 1, 2025 | 36 | — |
| ORD→ALB Chicago to Albany | July 1–31, 2025 | 23 | — |
| DSM→DEN Des Moines to Denver | June 26, 2025 | 1 | — |
| ORD→FAT Chicago to Fresno | June 1–25, 2025 | 22 | — |
| DEN→ECP Denver to Panama City Beach | May 24, 2025 – June 21, 2025 | 5 | — |
| ORD→PDX Chicago to Portland | March 31, 2024 – May 21, 2025 | 181 | 66.3% |
| IAH→MSP Houston to Minneapolis | May 3–17, 2025 | 3 | — |
| SRQ→ORD Sarasota/Bradenton to Chicago | April 1–30, 2025 | 30 | — |
| AUS→SFO Austin to San Francisco | February 16, 2025 – March 2, 2025 | 3 | — |
| SLC→IAD Salt Lake City to Washington | December 24–31, 2024 | 2 | — |
| PDX→IAH Portland to Houston | August 19–31, 2024 | 13 | — |
| MKE→EWR Milwaukee to Newark | July 14, 2024 | 1 | — |
| RSW→DEN Fort Myers to Denver | April 6–27, 2024 | 4 | — |
| ORD→EWR Chicago to Newark | March 7–29, 2024 | 20 | — |
| LAS→ORD Las Vegas to Chicago | January 8, 2024 | 1 | — |
| ORD→CMH Chicago to Columbus | December 25, 2023 – January 6, 2024 | 10 | — |
| ORD→HDN Chicago to Hayden | December 16, 2023 | 1 | — |
| ORD→LAS Chicago to Las Vegas | October 29, 2023 – November 27, 2023 | 29 | — |
| IAH→GRR Houston to Grand Rapids | November 23, 2023 | 1 | — |
| ORD→RSW Chicago to Fort Myers | August 1, 2023 – September 4, 2023 | 35 | — |
Because the same number has served different journeys, the statistics above describe only the route UA426 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.
52 min late
against a median of 3 min late
Percentiles over 997 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 |
|---|---|---|---|---|
| OO4754 | SkyWest Airlines | 88.7% | 16 min early | 666 |
| OO5353 | SkyWest Airlines | 83.9% | 5 min early | 817 |
| OO4736 | SkyWest Airlines | 80.9% | 7 min early | 739 |
| DL2358 | Delta Air Lines | 77.4% | 6 min early | 613 |
| DL1665 | Delta Air Lines | 71.7% | 5 min early | 707 |
| UA426 this flight | United Airlines | 67.3% | 3 min late | 997 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. UA426 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 997 records of UA426 operating DTW → 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