Flight number record

UA 701

United Airlines · Houston to San Juan

Route: IAH → SJU
Departs: 15:03
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 11 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 364 flights, with a median arrival 12 minutes early.

Set against the rest of the country, UA 701's record is 11 points better than the US average of 77.6%. That gap is worth roughly 106 fewer late arrivals for every thousand flights.

On time

88.2%

Arrivals under 15 minutes late, of 363 completed flights

Avg delay

70 min

Across delayed arrivals only, not all flights

Cancelled

0.27%

National rate is 1.81%

1 hour+ late

4.4%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 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.

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 162 of 364 flights, with 15:04 (153 flights) and 15:02 (49 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:03162 flights44.5%
Departs 15:04153 flights42.0%
Departs 15:0249 flights13.5%

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 15:03 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and UA 701 runs 16 points better at 88.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

UA 701 next to IAH to SJU

Every carrier on IAH to SJU combined arrived on time 81.0% of the time across 946 flights, so UA 701 is 7 points ahead of it. United flew 872 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 79.0%, which this flight beats by 9 points.

UA 701 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 701thin sample	364	88.2%	70 min	0.27%	A+
All United Airlines on IAH–SJU	872	82.7%	54 min	0.34%	B+
All carriers on IAH–SJU	946	81.0%	57 min	0.53%	B+
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 701 quarter by quarter

UA 701 did not run the same all year. Its best quarter was Jan–Mar 2026 at 94.3% on time and its weakest Jul–Sep 2025 at 79.3%, a swing of 15 points on roughly 91 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 202592 flights79.3%
Oct–Dec 202592 flights90.2%
Jan–Mar 202689 flights94.3%
Apr–Jun 202691 flights89.0%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, UA 701 ranged from 84.6% on Sunday to 92.3% 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.

Delay causes

Why UA 701 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 45% of the 3,004 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.

Late-arriving aircraft
45%
Carrier
33%
National Airspace System
13%
Extreme weather
9%

45% 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 3,004 reported delay minutes here, that single category outweighs weather by 5 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 3,004 delay minutes reported on UA 701.

Cancellations are rare at 0.27%, 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.

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: 88.2% on time and 0.27% 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures