Flight number record
UA 701
United Airlines · Houston to San Juan
- Route
- IAH → SJU
- Departs
- 15:03
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 701, check with United Airlines.
UA 701 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 14 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 55 minutes. That rests on 364 flights, with a median arrival 13 minutes early.
Set against the rest of the country, UA 701's record is 14 points better than the US average of 77.3%. That gap is worth roughly 136 fewer late arrivals for every thousand flights.
Key figures
On time
90.9%
Arrivals under 15 minutes late, of 363 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
0.27%
National rate is 1.89%
1 hour+ late
2.5%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 13 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 701 flies
UA 701 flies IAH to SJU without a single fixed slot. Its most common scheduled departure was 15:03, used on 190 of 364 flights, with 15:04 (153 flights) next.
- Departs 15:03190 flights52.2%
- Departs 15:04153 flights42.0%
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 15:03 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 701 runs 19 points better at 90.9%. 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 701 next to IAH to SJU
Every carrier on IAH to SJU combined arrived on time 84.8% of the time across 907 flights, so UA 701 is 6 points ahead of it. United flew 864 flights on the same city pair under all its flight numbers, including this one, and those ran 85.9% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 701thin sample | 364 | 90.9% | 55 min | 0.27% | A+ |
| All United Airlines on IAH–SJU | 864 | 85.9% | 43 min | 0.35% | A+ |
| All carriers on IAH–SJU | 907 | 84.8% | 49 min | 0.55% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 701 quarter by quarter
Quarter by quarter UA 701 held fairly steady: 93.3% in Jul–Sep 2025, 90.2% in Oct–Dec 2025, 94.3% in Jan–Mar 2026, 89.0% in Apr–Jun 2026 and 88.7% in Jul–Sep 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights93.3%
- Oct–Dec 202592 flights90.2%
- Jan–Mar 202689 flights94.3%
- Apr–Jun 202691 flights89.0%
- Jul–Sep 202662 flights88.7%
Scale runs 80% to 100%.
By weekday, UA 701 ranged from 88.5% on Sunday to 96.1% on Tuesday. With about 52 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late UA 701 runs when it is late
UA 701 often beats the schedule: 152 of 363 completed flights, 42%, arrived 15 minutes or more early. The 33 late arrivals split 16 under half an hour, 8 between 30 and 60 minutes, and 9 an hour or more.
- 15+ min early152 flights41.9%
- Within 15 min178 flights49.0%
- 15–29 min late16 flights4.4%
- 30–59 min late8 flights2.2%
- 1–2 hours late5 flights1.4%
- 2+ hours late4 flights1.1%
Scale runs 0% to 100%.
Share of 363 completed flights by arrival against schedule.
A late pushback is often recovered here: of 50 departures that left 15 minutes late or more, 23 still arrived on time. Only 6 left on time and still arrived late.
The worst days
Worst days for UA 701
The latest arrival of the period was on 21 May 2026, 3 hours 28 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 May 2026 | 3 hours 28 minutes | Late-arriving aircraft |
| 1 December 2025 | 2 hours 49 minutes | Late-arriving aircraft |
| 16 March 2026 | 2 hours 34 minutes | National Airspace System |
| 6 August 2026 | 2 hours 22 minutes | Carrier |
| 1 May 2026 | 1 hour 49 minutes | Late-arriving aircraft |
Delay causes
Why UA 701 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 1,798 reported delay minutes.
- 40%Late-arriving aircraft
- 35%Carrier
- 19%National Airspace System
- 6%Extreme weather
40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 1,798 reported delay minutes here, that single category outweighs weather by 6 to one. The split is drawn from 1,798 delay minutes reported on UA 701.
Cancellations are rare at 0.27%, below the national 1.89% 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 2.5% 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.
At 2,007 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 364 flights under UA 701 in the data flew IAH to SJU. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 364 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 701
For a booking, UA 701 has one of the better records a US domestic flight can show: 90.9% on time and 0.27% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- IAH to SJU, every carrier and departure
- SJU to IAH, the return direction
- United Airlines 1192 on the same route81.0%
- George Bush Intercontinental (IAH) delay statistics
- Luis Munoz Marin International (SJU) 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.