Flight number record

UA 1798

United Airlines · Houston to Phoenix

Route: IAH → PHX
Departs: 14:20
Flights: 267
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1798, check with United Airlines.

UA 1798 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 50 minutes. That rests on 267 flights, with a median arrival 12 minutes early.

Set against the rest of the country, UA 1798's record is 9 points better than the US average of 77.3%. That gap is worth roughly 88 fewer late arrivals for every thousand flights.

On time

86.1%

Arrivals under 15 minutes late, of 266 completed flights

Avg delay

50 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.89%

1 hour+ late

2.6%

National rate is 8.3%

These figures cover 267 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.

Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

Schedule

When UA 1798 flies

UA 1798 flies IAH to PHX without a single fixed slot. Its most common scheduled departure was 14:20, used on 102 of 267 flights, with 14:47 (76 flights) and 13:14 (31 flights) next.

Departs 14:20102 flights38.2%
Departs 14:4776 flights28.5%
Departs 13:1431 flights11.6%

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 14:20 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 1798 runs 14 points better at 86.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

Against the route

UA 1798 next to IAH to PHX

Every carrier on IAH to PHX combined arrived on time 79.9% of the time across 2,980 flights, so UA 1798 is 6 points ahead of it. United flew 1,776 flights on the same city pair under all its flight numbers, including this one, and those ran 82.7% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 7 points.

UA 1798 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1798thin sample	267	86.1%	50 min	0.00%	A+
All United Airlines on IAH–PHX	1,776	82.7%	61 min	0.23%	B+
All carriers on IAH–PHX	2,980	79.9%	87 min	0.74%	B+
United Airlines, whole network	830,825	78.8%	73 min	1.02%	B

Across the year

UA 1798 quarter by quarter

Quarter by quarter UA 1798 held fairly steady: 87.0% in Oct–Dec 2025, 89.3% in Jan–Mar 2026 and 81.2% in Apr–Jun 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202522 flights—
Oct–Dec 202555 flights87.0%
Jan–Mar 202684 flights89.3%
Apr–Jun 202685 flights81.2%
Jul–Sep 202621 flights—

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, UA 1798 did best on Tuesday at 97.1% on time and worst on Saturday at 78.4%. Each day rests on about 38 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late UA 1798 runs when it is late

UA 1798 often beats the schedule: 116 of 266 completed flights, 44%, arrived 15 minutes or more early. The 37 late arrivals split 17 under half an hour, 13 between 30 and 60 minutes, and 7 an hour or more.

15+ min early116 flights43.6%
Within 15 min113 flights42.5%
15–29 min late17 flights6.4%
30–59 min late13 flights4.9%
1–2 hours late5 flights1.9%
2+ hours late2 flights0.8%

Scale runs 0% to 100%.

Share of 266 completed flights by arrival against schedule.

A late pushback is often recovered here: of 37 departures that left 15 minutes late or more, 12 still arrived on time. 12 flights left on time and still arrived late.

The worst days

Worst days for UA 1798

The latest arrival of the period was on 26 September 2025, 7 hours 14 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across September, January, October and March, with no single month standing out.

The latest arrivals of UA 1798 in the period
Date	Arrived late by	Largest filed cause
26 September 2025	7 hours 14 minutes	Extreme weather
21 September 2025	2 hours 17 minutes	Carrier
26 January 2026	1 hour 26 minutes	Late-arriving aircraft
16 October 2025	1 hour 8 minutes	National Airspace System
12 March 2026	1 hour 4 minutes	Late-arriving aircraft

Delay causes

Why UA 1798 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 1,849 reported delay minutes.

Late-arriving aircraft
29%
National Airspace System
26%
Extreme weather
25%
Carrier
20%

Extreme weather accounts for 25% 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 4.2 times the usual weather exposure. The split is drawn from 1,849 delay minutes reported on UA 1798.

Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are 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 2.6% 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 1,009 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 three other city pairs in the data, including PHX to EWR (116), DTW to IAH (114) and LAX to HNL (47), but none flew often enough under UA 1798 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAH to PHX only.

One caution: this is a thin sample. 267 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 1798

For a booking, UA 1798 has one of the better records a US domestic flight can show: 86.1% on time and 0.00% 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures