Flight number record
UA 1797
United Airlines · Houston to Newark
- Route
- IAH → EWR
- Departs
- 06:00
- Flights
- 283
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1797, check with United Airlines.
UA 1797 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 50 minutes. That rests on 283 flights, with a median arrival 12 minutes early.
Set against the rest of the country, UA 1797's record is 16 points better than the US average of 77.3%. That gap is worth roughly 163 fewer late arrivals for every thousand flights.
Key figures
On time
93.6%
Arrivals under 15 minutes late, of 281 completed flights
Avg delay
50 min
Across delayed arrivals only, not all flights
Cancelled
0.71%
National rate is 1.89%
1 hour+ late
1.8%
National rate is 8.3%
These figures cover 283 flights between September 2025 and August 2026. The median arrival is 12 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When UA 1797 flies
UA 1797 flies IAH to EWR without a single fixed slot. Its most common scheduled departure was 06:00, used on 96 of 283 flights, with 06:01 (58 flights) and 06:30 (45 flights) next.
- Departs 06:0096 flights33.9%
- Departs 06:0158 flights20.5%
- Departs 06:3045 flights15.9%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and UA 1797 runs 4 points better at 93.6%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
UA 1797 next to IAH to EWR
Every carrier on IAH to EWR combined arrived on time 75.4% of the time across 3,717 flights, so UA 1797 is 18 points ahead of it. United flew 3,510 flights on the same city pair under all its flight numbers, including this one, and those ran 75.2% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 15 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1797thin sample | 283 | 93.6% | 50 min | 0.71% | A+ |
| All United Airlines on IAH–EWR | 3,510 | 75.2% | 72 min | 1.57% | B |
| All carriers on IAH–EWR | 3,717 | 75.4% | 71 min | 1.86% | B |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1797 quarter by quarter
Quarter by quarter UA 1797 held fairly steady: 91.3% in Oct–Dec 2025, 90.4% in Jan–Mar 2026, 95.6% in Apr–Jun 2026 and 97.6% in Jul–Sep 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 20256 flights—
- Oct–Dec 202592 flights91.3%
- Jan–Mar 202653 flights90.4%
- Apr–Jun 202691 flights95.6%
- Jul–Sep 202641 flights97.6%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1797 did best on Monday at 100.0% on time and worst on Thursday at 87.5%. Each day rests on about 40 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1797 runs when it is late
UA 1797 often beats the schedule: 98 of 281 completed flights, 35%, arrived 15 minutes or more early. Most of the lateness is short. 9 of the 18 late arrivals were under half an hour behind, and 5 reached an hour or more.
- 15+ min early98 flights34.9%
- Within 15 min165 flights58.7%
- 15–29 min late9 flights3.2%
- 30–59 min late4 flights1.4%
- 1–2 hours late4 flights1.4%
- 2+ hours late1 flights0.4%
Scale runs 0% to 100%.
Share of 281 completed flights by arrival against schedule.
Only 14 of 281 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for UA 1797
The latest arrival of the period was on 24 February 2026, 4 hours 37 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across February, November, April and May, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 February 2026 | 4 hours 37 minutes | Extreme weather |
| 8 November 2025 | 1 hour 21 minutes | National Airspace System |
| 5 April 2026 | 1 hour 12 minutes | Carrier |
| 23 May 2026 | 1 hour 7 minutes | Extreme weather |
| 14 November 2025 | 1 hour 2 minutes | Carrier |
Delay causes
Why UA 1797 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 906 reported delay minutes.
- 35%Extreme weather
- 30%National Airspace System
- 29%Carrier
- 5%Late-arriving aircraft
Extreme weather accounts for 35% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 5.8 times the usual weather exposure. The split is drawn from 906 delay minutes reported on UA 1797.
Cancellations are rare at 0.71%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 1.8% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 1,400 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The same number turns up on one other city pair in the data, including EWR to PBI (246), but none flew often enough under UA 1797 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAH to EWR only.
One caution: this is a thin sample. 283 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking UA 1797
For a booking, UA 1797 has one of the better records a US domestic flight can show: 93.6% on time and 0.71% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- IAH to EWR, every carrier and departure
- EWR to IAH, the return direction
- United Airlines 1886 on the same route88.5%
- United Airlines 404 on the same route66.6%
- United Airlines 1444 on the same route76.3%
- United Airlines 1397 on the same route73.2%
- United Airlines 2608 on the same route59.1%
- United Airlines 700 on the same route63.5%
- George Bush Intercontinental (IAH) delay statistics
- Newark Liberty International (EWR) delay statistics
- United Airlines on-time record
- Every United Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
A flight number here means United Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.