Flight number record

UA 1179

United Airlines · Houston to Austin

Route: IAH → AUS
Departs: 22:15
Flights: 307
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1179, check with United Airlines.

UA 1179 lands a B, 4 points better than the national rate of 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 307 flights, with a median arrival 5 minutes early.

Set against the rest of the country, UA 1179's record is 4 points better than the US average of 77.6%. That gap is worth roughly 42 fewer late arrivals for every thousand flights.

On time

81.8%

Arrivals under 15 minutes late, of 302 completed flights

Avg delay

71 min

Across delayed arrivals only, not all flights

Cancelled

1.63%

National rate is 1.81%

1 hour+ late

7.0%

National rate is 8.1%

These figures cover 307 flights between July 2025 and June 2026. The median arrival is 5 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 1179 flies

UA 1179 flies IAH to AUS without a single fixed slot. Its most common scheduled departure was 22:15, used on 71 of 307 flights, with 21:55 (61 flights) and 22:00 (45 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 22:1571 flights23.1%
Departs 21:5561 flights19.9%
Departs 22:0045 flights14.7%

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 22:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and UA 1179 runs 11 points better at 81.8%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

UA 1179 next to IAH to AUS

Every carrier on IAH to AUS combined arrived on time 79.4% of the time across 2,675 flights, so UA 1179 is 2 points ahead of it. United flew 2,609 flights on the same city pair under all its flight numbers, including this one, and those ran 79.4% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 3 points.

UA 1179 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1179thin sample	307	81.8%	71 min	1.63%	B
All United Airlines on IAH–AUS	2,609	79.4%	65 min	0.80%	B+
All carriers on IAH–AUS	2,675	79.4%	66 min	0.79%	B+
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 1179 quarter by quarter

Quarter by quarter UA 1179 held fairly steady: 79.5% in Jul–Sep 2025, 85.9% in Oct–Dec 2025, 85.9% in Jan–Mar 2026 and 76.2% in Apr–Jun 2026. A spread of 10 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202575 flights79.5%
Oct–Dec 202571 flights85.9%
Jan–Mar 202680 flights85.9%
Apr–Jun 202681 flights76.2%

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, UA 1179 did best on Monday at 86.3% on time and worst on Sunday at 74.0%. Each day rests on about 44 flights, so a gap of 12 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 1179 runs late

One category carries most of the weight here. Carrier accounts for 47% of the 3,891 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
47%
Late-arriving aircraft
38%
National Airspace System
12%
Extreme weather
4%

38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 3,891 reported delay minutes here, that single category outweighs weather by 10 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 3,891 delay minutes reported on UA 1179.

Cancellations sit at 1.63% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

7.0% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

The same number turns up on seven other city pairs in the data, including SAN to IAH (68), MCO to IAH (45) and SNA to IAH (36), but none flew often enough under UA 1179 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAH to AUS only.

One caution: this is a thin sample. 307 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 1179

For a booking, read UA 1179 as 81.8% on time with 1.63% cancelled over 307 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