Flight number record
UA 1743
United Airlines · Houston to Los Angeles
- Route
- IAH → LAX
- Departs
- 16:31
- Flights
- 360
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1743, check with United Airlines.
UA 1743 lands a B+, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 360 flights, with a median arrival 8 minutes early.
Set against the rest of the country, UA 1743's record is 6 points better than the US average of 77.3%. That gap is worth roughly 60 fewer late arrivals for every thousand flights.
Key figures
On time
83.3%
Arrivals under 15 minutes late, of 360 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
6.4%
National rate is 8.3%
These figures cover 360 flights between September 2025 and August 2026. The median arrival is 8 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 1743 flies
UA 1743 flies IAH to LAX without a single fixed slot. Its most common scheduled departure was 16:31, used on 95 of 360 flights, with 16:30 (79 flights) and 16:25 (71 flights) next.
- Departs 16:3195 flights26.4%
- Departs 16:3079 flights21.9%
- Departs 16:2571 flights19.7%
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 16:31 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 1743 runs 11 points better at 83.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
UA 1743 next to IAH to LAX
Every carrier on IAH to LAX combined arrived on time 84.1% of the time across 5,147 flights, so UA 1743 is about level with it. United flew 3,421 flights on the same city pair under all its flight numbers, including this one, and those ran 85.7% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1743thin sample | 360 | 83.3% | 66 min | 0.00% | B+ |
| All United Airlines on IAH–LAX | 3,421 | 85.7% | 57 min | 0.20% | A+ |
| All carriers on IAH–LAX | 5,147 | 84.1% | 62 min | 0.45% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1743 quarter by quarter
UA 1743 did not run the same all year. Its best quarter was Jan–Mar 2026 at 87.8% on time and its weakest Apr–Jun 2026 at 75.9%, a swing of 12 points on roughly 72 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 202530 flights83.3%
- Oct–Dec 202591 flights84.6%
- Jan–Mar 202690 flights87.8%
- Apr–Jun 202687 flights75.9%
- Jul–Sep 202662 flights85.5%
Scale runs 65% to 95%.
By weekday, UA 1743 did best on Tuesday at 89.6% on time and worst on Wednesday at 75.0%. Each day rests on about 51 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1743 runs when it is late
UA 1743 often beats the schedule: 110 of 360 completed flights, 31%, arrived 15 minutes or more early. The 60 late arrivals split 23 under half an hour, 14 between 30 and 60 minutes, and 23 an hour or more.
- 15+ min early110 flights30.6%
- Within 15 min190 flights52.8%
- 15–29 min late23 flights6.4%
- 30–59 min late14 flights3.9%
- 1–2 hours late15 flights4.2%
- 2+ hours late8 flights2.2%
Scale runs 0% to 100%.
Share of 360 completed flights by arrival against schedule.
A late pushback is often recovered here: of 70 departures that left 15 minutes late or more, 24 still arrived on time. 14 flights left on time and still arrived late.
The worst days
Worst days for UA 1743
The latest arrival of the period was on 3 June 2026, 4 hours 32 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across June, November, July and March, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 June 2026 | 4 hours 32 minutes | Late-arriving aircraft |
| 20 November 2025 | 3 hours 5 minutes | National Airspace System |
| 19 June 2026 | 3 hours 5 minutes | Extreme weather |
| 29 July 2026 | 2 hours 58 minutes | Late-arriving aircraft |
| 7 March 2026 | 2 hours 53 minutes | Extreme weather |
Delay causes
Why UA 1743 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 3,958 reported delay minutes.
- 41%Late-arriving aircraft
- 30%Carrier
- 19%National Airspace System
- 10%Extreme weather
41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,958 reported delay minutes here, that single category outweighs weather by 4 to one. The split is drawn from 3,958 delay minutes reported on UA 1743.
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
6.4% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
The 1,379 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 six other city pairs in the data, including MIA to IAH (98), LAX to SFO (96) and SFO to SBA (83), but none flew often enough under UA 1743 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAH to LAX only.
One caution: this is a thin sample. 360 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 1743
For a booking, read UA 1743 as 83.3% on time with 0.00% cancelled over 360 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- IAH to LAX, every carrier and departure
- LAX to IAH, the return direction
- Delta Air Lines 1216 on the same route93.1%
- United Airlines 2460 on the same route89.0%
- United Airlines 2600 on the same route91.3%
- United Airlines 469 on the same route89.0%
- Frontier Airlines 1755 on the same route71.9%
- United Airlines 2095 on the same route76.7%
- George Bush Intercontinental (IAH) delay statistics
- Los Angeles International (LAX) 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
- Why the first flight of the morning is statistically safest
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.