Flight profile · United Airlines
UA1680
Los Angeles (LAX) to Houston (IAH) · scheduled 6:45 PM – 12:45 AM
How UA1680 performs
870 operations, July 2023 – August 2026.
Between its first and last recorded date on LAX → IAH, UA1680 averaged about 5 operations a week (870 in 1,158 days, cancelled ones included).
UA1680 arrived on time 84.7% of the time, level with the 85.2% for all LAX → IAH flights: on arrival punctuality it is a typical departure on this route, neither better nor worse.
UA1680’s scheduled departure has moved during the period FlyerIntel has on file: it typically left around 7:30 PM earlier on, and around 6:45 PM more recently — a 45-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 · 870 operations, July 2023 – August 2026 · If UA1680 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where UA1680 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 |
|---|---|---|---|---|---|
| UA1680 | 84.7% | 1.49% | -12 min | 5.6% | 870 |
| United Airlines on LAX → IAH | 87.8% | 0.98% | -10 min | 3.7% | 10,746 |
| All LAX → IAH flights | 85.2% | 1.02% | -9 min | 5.0% | 16,846 |
UA1680 cancelled 13 of 870 operations (1.49%), close to the 1.02% for LAX → IAH.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026
Why UA1680 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
Share of the delay minutes US DOT attributed to each cause for UA1680 on LAX → IAH. Only delays of 15 minutes or more are attributed. What the five causes mean
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – August 2026
Does a late aircraft delay this flight?
How often the plane that flies UA1680 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, UA1680 pushed back an average of 26 minutes late; when it came in on time or early, an average of 2 minutes late.
Matched by tail number to the aircraft’s previous flight into LAX: 738 of 857 departures. Unknown, cancelled or diverted inbounds and gaps over 12 hours are left out.
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 |
|---|---|---|---|
| UA1680 | 20% | 49% | 7% |
| Network, same turn | 17% | 69% | 9% |
80 scheduled minutes is enough to clean and board when the aircraft is on time, with little to spare when it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often UA1680’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often UA1680 left 15 or more minutes late is lower than the network’s.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – August 2026
From pushback to gate
When it leaves LAX late, does that still matter by the time it reaches IAH?
UA1680 pushes back an average of 8.8 minutes late and reaches the gate at IAH an average of 1.4 minutes early. The 10.3 minutes between those two figures are slack the published schedule already carries, so on average a late pushback on this flight is made up before the gate. Its 17.2 minutes on the taxiways at LAX is about what any departure from the airport in that hour spends.
On arrival at IAH, UA1680 spends 7.4 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 3.2 minutes shorter than a typical IAH arrival (10.6 min).
Taxi-out is gate to wheels up and sits inside the scheduled block; the hourly comparison is 32,559 LAX departures. Taxi-in is landing to gate, set against 369,280 arrivals at IAH. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026
The hour it leaves LAX
UA1680 has one departure time, 6:45 PM, so this is what that hour at LAX is worth.
On-time arrival rate. 32,559 departures from LAX are scheduled in the 6 PM–7 PM hour over the period, against 611,647 across the whole day.
UA1680 is scheduled out of LAX at 6:45 PM, in the 6 PM–7 PM bank. Departures from LAX in that hour arrive on time 77.0% of the time against 81.3% across the airport’s whole day — the slot alone is worth 4.3 points worse before anything about this particular flight is considered.
Both airport figures cover every destination from LAX, so they describe the slot, not this journey; the route comparison is above. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026 · Hours below 120 departures are not scored.
By day of week
Does UA1680 run worse on particular days?
Monday is historically the most reliable day and Sunday the least, a gap of 9.9 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026 · Days with fewer than 120 operations are not scored.
Other routes UA1680 has flown
Carriers reassign flight numbers. UA1680 also served these 12 other city pairs in the period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| IAH→BDL Houston to Hartford | June 25, 2026 – August 10, 2026 | 47 | — |
| LAX→PIT Los Angeles to Pittsburgh | April 30, 2026 – May 20, 2026 | 21 | — |
| ORD→SAV Chicago to Savannah | April 1–29, 2026 | 21 | — |
| SFO→DTW San Francisco to Detroit | April 5–26, 2026 | 4 | — |
| CMH→LAX Columbus to Los Angeles | March 29–31, 2026 | 3 | — |
| MSN→ORD Madison to Chicago | February 12, 2026 – March 28, 2026 | 42 | — |
| SFO→PHX San Francisco to Phoenix | March 8–22, 2026 | 3 | — |
| ORD→LAX Chicago to Los Angeles | February 12, 2026 – March 4, 2026 | 21 | — |
| DEN→PHL Denver to Philadelphia | August 19–30, 2025 | 4 | — |
| SFO→AUS San Francisco to Austin | June 3–24, 2025 | 4 | — |
| IND→IAH Indianapolis to Houston | January 7, 2025 – February 12, 2025 | 37 | — |
| EWR→MCO Newark to Orlando | February 16, 2024 – March 1, 2024 | 3 | — |
The figures above describe only LAX → IAH, the route UA1680 flies now.
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 12 min early
Percentiles over 870 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – August 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| UA1416 | United Airlines | 91.9% | 11 min early | 1,113 |
| DL1143 | Delta Air Lines | 85.3% | 8 min early | 1,068 |
| UA2377 | United Airlines | 85.0% | 8 min early | 906 |
| UA1680 this flight | United Airlines | 84.7% | 12 min early | 870 |
| DL1287 | Delta Air Lines | 82.1% | 7 min early | 856 |
Among all 5 departures on this route with at least 600 operations, UA1680 has the 4th highest on-time rate, 7.2 points behind the best. Every departure here has at least 600 operations; the other rows are the most punctual on the route, not all of them.
Data and methodology
Calculated by FlyerIntel from 870 records of UA1680 operating LAX → IAH, 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 reported separately, not in the on-time rate.
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