Flight number record

UA 1798

United Airlines · Houston to Phoenix

Route: IAH → PHX
Departs: 14:20
Flights: 296
Period: July 2025 to June 2026

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

UA 1798 lands a B+, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 296 flights, with a median arrival 9 minutes early.

Set against the rest of the country, UA 1798's record is 5 points better than the US average of 77.6%. That gap is worth roughly 54 fewer late arrivals for every thousand flights.

On time

83.0%

Arrivals under 15 minutes late, of 294 completed flights

Avg delay

56 min

Across delayed arrivals only, not all flights

Cancelled

0.34%

National rate is 1.81%

1 hour+ late

4.4%

National rate is 8.1%

These figures cover 296 flights between July 2025 and June 2026. The median arrival is 9 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 1798 flies

UA 1798 flies IAH to PHX without a single fixed slot. Its most common scheduled departure was 14:20, used on 131 of 296 flights, with 14:47 (76 flights) and 13:14 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 14:20131 flights44.3%
Departs 14:4776 flights25.7%
Departs 13:1431 flights10.5%

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 14:20 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and UA 1798 runs 11 points better at 83.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

UA 1798 next to IAH to PHX

Every carrier on IAH to PHX combined arrived on time 78.7% of the time across 2,930 flights, so UA 1798 is 4 points ahead of it. United flew 1,784 flights on the same city pair under all its flight numbers, including this one, and those ran 80.0% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 4 points.

UA 1798 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1798thin sample	296	83.0%	56 min	0.34%	B+
All United Airlines on IAH–PHX	1,784	80.0%	64 min	0.34%	B+
All carriers on IAH–PHX	2,930	78.7%	86 min	0.82%	B+
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 1798 quarter by quarter

UA 1798 did not run the same all year. Its best quarter was Jan–Mar 2026 at 89.3% on time and its weakest Jul–Sep 2025 at 74.6%, a swing of 15 points on roughly 74 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Jul–Sep 202572 flights74.6%
Oct–Dec 202555 flights87.0%
Jan–Mar 202684 flights89.3%
Apr–Jun 202685 flights81.2%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, UA 1798 did best on Tuesday at 94.6% on time and worst on Sunday at 75.0%. Each day rests on about 42 flights, so a gap of 20 points is worth noticing but could still narrow in another year.

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 2,784 reported delay minutes.

Late-arriving aircraft
30%
Extreme weather
28%
Carrier
22%
National Airspace System
19%

Extreme weather accounts for 28% 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 4.5 times the usual weather exposure. The split is drawn from 2,784 delay minutes reported on UA 1798.

Cancellations are rare at 0.34%, 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 4.4% 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 1,009 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. 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.

The same number turns up on six other city pairs in the data, including DTW to IAH (126), PHX to EWR (116) and SAT to IAH (41), 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. 296 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, read UA 1798 as 83.0% on time with 0.34% cancelled over 296 flights. Those are rates from the past twelve months, not a forecast for any particular 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