Flight profile · United Airlines
UA740
Houston (IAH) to Portland (PDX) · scheduled 9:30 AM – 11:56 AM
How UA740 performs
864 operations, December 2023 – July 2026.
UA740 arrived on time 84.8% of the time, against 79.3% for all IAH → PDX flights, so this departure is 5.5 percentage points better than the route as a whole. Against United Airlines’ own flights on this route it is 5.3 points better.
Source: US DOT Bureau of Transportation Statistics · 864 operations, December 2023 – July 2026 · If UA740 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where UA740 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 |
|---|---|---|---|---|---|
| UA740 | 84.8% | 0.58% | -8 min | 5.6% | 864 |
| United Airlines on IAH → PDX | 79.5% | 0.78% | -6 min | 7.3% | 2,696 |
| All IAH → PDX flights | 79.3% | 0.80% | -6 min | 7.2% | 3,127 |
Source: FlyerIntel analysis of US DOT BTS data · December 2023 – July 2026
Why UA740 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for UA740 on IAH → PDX. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering December 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies UA740 comes in late, and what that does to the departure.
The aircraft flying UA740 came in 15 or more minutes late on 11% of the departures where its previous flight is known. There are not enough departures in both groups to say how the flight left after a late one and after an on-time one.
Each departure is matched to the flight the same aircraft flew into IAH just before it, using the tail number in the DOT file, 579 of 859 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 |
|---|---|
| UA740 | 11% |
| Network, same turn | 17% |
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 UA740’s aircraft landed 15 or more minutes late is lower than the network’s. There are not enough departures in both groups to compare how it left.
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 December 2023 – July 2026
From pushback to gate
When it leaves IAH late, does that still matter by the time it reaches PDX?
UA740 pushes back an average of 10.7 minutes late and reaches the gate at PDX an average of 2.0 minutes late. The 8.7 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 21.5 minutes on the taxiways at IAH is about what any departure from the airport in that hour spends.
On arrival at PDX, UA740 spends 4.0 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 1.1 minutes shorter than a typical PDX arrival (5.1 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 PDX. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 27,050 departures from IAH scheduled in the clock hour UA740 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at PDX (187,629 flights), not just UA740’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · December 2023 – July 2026
The hour it leaves IAH
Part of any flight’s record belongs to the clock rather than to the flight. UA740 has one departure time, so this is what that time is worth.
On-time arrival rate. 27,050 departures from IAH are scheduled in the 9 AM–10 AM hour over the period, against 359,450 across the whole day.
UA740 is scheduled out of IAH at 9:30 AM, in the 9 AM–10 AM bank. Departures from IAH in that hour arrive on time 82.7% of the time against 77.4% across the airport’s whole day — the slot alone is worth 5.3 points better before anything about this particular flight is considered.
The two airport figures cover every departure from IAH 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 · December 2023 – July 2026 · Hours below 120 departures are not scored.
By day of week
Does UA740 run worse on particular days?
Sunday is historically the most reliable day and Friday the least, a gap of 9.5 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · December 2023 – July 2026 · Days with fewer than 120 operations are not scored.
Other routes UA740 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 |
|---|---|---|---|
| MCI→IAH Kansas City to Houston | March 6, 2025 – July 31, 2026 | 135 | 90.4% |
| SAT→IAH San Antonio to Houston | May 21–31, 2026 | 11 | — |
| RSW→IAH Fort Myers to Houston | February 12, 2026 – March 4, 2026 | 21 | — |
| MIA→IAH Miami to Houston | December 18, 2025 – February 9, 2026 | 43 | — |
| ORD→IAH Chicago to Houston | December 2–17, 2025 | 14 | — |
| IAD→IAH Washington to Houston | October 26, 2025 – December 1, 2025 | 36 | — |
| MEM→IAH Memphis to Houston | May 23, 2024 – October 25, 2025 | 60 | — |
| PDX→ORD Portland to Chicago | August 19, 2025 – September 24, 2025 | 37 | — |
| OMA→IAH Omaha to Houston | June 26, 2025 – August 18, 2025 | 54 | — |
| PDX→SFO Portland to San Francisco | August 1–18, 2025 | 18 | — |
| MAF→IAH Midland to Houston | December 4, 2024 – June 25, 2025 | 67 | — |
| PNS→IAH Pensacola to Houston | February 13, 2025 – March 5, 2025 | 21 | — |
| ATL→SFO Atlanta to San Francisco | December 3, 2024 | 1 | — |
| FLL→IAH Fort Lauderdale to Houston | October 27, 2024 – December 2, 2024 | 36 | — |
| TUL→IAH Tulsa to Houston | September 26, 2024 – October 26, 2024 | 31 | — |
| GSP→IAH Greenville/Greer/Spartanburg to Houston | June 27, 2024 – August 18, 2024 | 53 | — |
| RDU→IAH Raleigh–Durham to Houston | February 15, 2024 – May 22, 2024 | 98 | 92.6% |
| CMH→ORD Columbus to Chicago | November 28, 2023 – December 20, 2023 | 21 | — |
| IAH→MAF Houston to Midland | October 30, 2023 – November 27, 2023 | 20 | — |
| DRO→DEN Durango to Denver | November 26, 2023 | 1 | — |
| BNA→IAH Nashville to Houston | July 1, 2023 – October 28, 2023 | 117 | 90.4% |
| BHM→IAH Birmingham to Houston | September 9, 2023 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route UA740 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.
28 min late
against a median of 8 min early
Percentiles over 864 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering December 2023 – July 2026
Data and methodology
Calculated by FlyerIntel from 864 records of UA740 operating IAH → PDX, 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