Flight number record

UA 1797

United Airlines · Houston to Newark

Route: IAH → EWR
Departs: 06:00
Flights: 281
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1797, check with United Airlines.

UA 1797 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 15 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 281 flights, with a median arrival 12 minutes early.

Set against the rest of the country, UA 1797's record is 15 points better than the US average of 77.6%. That gap is worth roughly 149 fewer late arrivals for every thousand flights.

On time

92.5%

Arrivals under 15 minutes late, of 279 completed flights

Avg delay

48 min

Across delayed arrivals only, not all flights

Cancelled

0.71%

National rate is 1.81%

1 hour+ late

2.2%

National rate is 8.1%

These figures cover 281 flights between July 2025 and June 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.

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 84 of 281 flights, with 06:30 (45 flights) and 06:03 (39 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:0084 flights29.9%
Departs 06:3045 flights16.0%
Departs 06:0339 flights13.9%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 3 points better at 92.5%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

UA 1797 next to IAH to EWR

Every carrier on IAH to EWR combined arrived on time 74.6% of the time across 3,800 flights, so UA 1797 is 18 points ahead of it. United flew 3,534 flights on the same city pair under all its flight numbers, including this one, and those ran 74.5% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 14 points.

UA 1797 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1797thin sample	281	92.5%	48 min	0.71%	A+
All United Airlines on IAH–EWR	3,534	74.5%	72 min	1.56%	C
All carriers on IAH–EWR	3,800	74.6%	71 min	1.89%	C
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 1797 quarter by quarter

Quarter by quarter UA 1797 held fairly steady: 91.1% in Jul–Sep 2025, 91.3% in Oct–Dec 2025, 90.4% in Jan–Mar 2026 and 95.6% in Apr–Jun 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202545 flights91.1%
Oct–Dec 202592 flights91.3%
Jan–Mar 202653 flights90.4%
Apr–Jun 202691 flights95.6%

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 Saturday at 83.3%. Each day rests on about 40 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

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 1,014 reported delay minutes.

National Airspace System
36%
Extreme weather
31%
Carrier
27%
Late-arriving aircraft
5%

Extreme weather accounts for 31% 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 5.0 times the usual weather exposure. The split is drawn from 1,014 delay minutes reported on UA 1797.

Cancellations are rare at 0.71%, below the national 1.81% 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 2.2% land an hour or more behind schedule, against 8.1% 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

UA 1797 is not only a IAH to EWR flight. It also flew EWR to PBI (278 flights, 74.2% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 281 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.

Other routes flown as UA 1797
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
EWR to PBIthin sample	278	74.2%	82 min	0.72%	C+

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: 92.5% on time and 0.71% cancelled. That is a base rate, not a promise about any single day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures