Flight number record

UA 226

United Airlines · Boston to Houston

Route: BOS → IAH
Departs: 07:25
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 226, check with United Airlines.

UA 226 earns an A. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 35 minutes. That rests on 364 flights, with a median arrival 19 minutes early.

Set against the rest of the country, UA 226's record is 16 points better than the US average of 77.6%. That gap is worth roughly 159 fewer late arrivals for every thousand flights.

On time

93.5%

Arrivals under 15 minutes late, of 356 completed flights

Avg delay

33 min

Across delayed arrivals only, not all flights

Cancelled

1.92%

National rate is 1.81%

1 hour+ late

0.3%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 2026. The median arrival is 19 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 226 flies

UA 226 flies BOS to IAH without a single fixed slot. Its most common scheduled departure was 07:25, used on 104 of 364 flights, with 07:30 (67 flights) and 07:45 (49 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:25104 flights28.6%
Departs 07:3067 flights18.4%
Departs 07:4549 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 07:25 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and UA 226 runs 4 points better at 93.5%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

UA 226 next to BOS to IAH

Every carrier on BOS to IAH combined arrived on time 81.8% of the time across 2,027 flights, so UA 226 is 12 points ahead of it. United flew 1,567 flights on the same city pair under all its flight numbers, including this one, and those ran 83.8% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 15 points.

UA 226 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 226thin sample	364	93.5%	33 min	1.92%	A
All United Airlines on BOS–IAH	1,567	83.8%	71 min	1.47%	B
All carriers on BOS–IAH	2,027	81.8%	67 min	1.43%	B
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 226 quarter by quarter

Quarter by quarter UA 226 held fairly steady: 94.4% in Jul–Sep 2025, 95.7% in Oct–Dec 2025, 91.6% in Jan–Mar 2026 and 92.3% in Apr–Jun 2026. A spread of 4 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights94.4%
Oct–Dec 202592 flights95.7%
Jan–Mar 202689 flights91.6%
Apr–Jun 202691 flights92.3%

Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, UA 226 ranged from 86.5% on Saturday to 98.0% on Wednesday. With about 52 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why UA 226 runs late

One category carries most of the weight here. National Airspace System accounts for 58% of the 766 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.

National Airspace System
58%
Carrier
37%
Extreme weather
4%
Late-arriving aircraft
1%

The largest share of delay minutes, 37%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 284 of the 766 delay minutes reported here. The split is drawn from 766 delay minutes reported on UA 226.

Cancellations sit at 1.92% against a national 1.81%, which is ordinary. Diversions add another 0.27%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 0.3% 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 1,597 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.

The same number turns up on one other city pair in the data, including CLT to EWR (1), but none flew often enough under UA 226 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BOS to IAH only.

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 226

For a booking, read UA 226 as 93.5% on time with 1.92% cancelled over 364 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