Flight number record

UA 2441

United Airlines · Boston to San Francisco

Route: BOS → SFO
Departs: 06:00
Flights: 313
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 2441, check with United Airlines.

UA 2441 lands a B+, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by roughly 40 minutes on average. That is a workable record, not a spotless one. That rests on 313 flights, with a median arrival 7 minutes early.

Set against the rest of the country, UA 2441's record is 6 points better than the US average of 77.6%. That gap is worth roughly 59 fewer late arrivals for every thousand flights.

On time

83.5%

Arrivals under 15 minutes late, of 310 completed flights

Avg delay

42 min

Across delayed arrivals only, not all flights

Cancelled

0.96%

National rate is 1.81%

1 hour+ late

2.6%

National rate is 8.1%

These figures cover 313 flights between July 2025 and June 2026. The median arrival is 7 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 2441 flies

UA 2441 flies BOS to SFO without a single fixed slot. Its most common scheduled departure was 06:00, used on 225 of 313 flights, with 06:02 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:00225 flights71.9%
Departs 06:0237 flights11.8%

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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and UA 2441 runs 6 points worse at 83.5%. 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 2441 next to BOS to SFO

Every carrier on BOS to SFO combined arrived on time 72.6% of the time across 4,676 flights, so UA 2441 is 11 points ahead of it. United flew 1,867 flights on the same city pair under all its flight numbers, including this one, and those ran 76.3% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 5 points.

UA 2441 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 2441thin sample	313	83.5%	42 min	0.96%	B+
All United Airlines on BOS–SFO	1,867	76.3%	66 min	1.12%	B
All carriers on BOS–SFO	4,676	72.6%	65 min	1.22%	C
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 2441 quarter by quarter

UA 2441 did not run the same all year. Its best quarter was Apr–Jun 2026 at 90.7% on time and its weakest Jan–Mar 2026 at 73.5%, a swing of 17 points on roughly 78 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 202591 flights87.9%
Oct–Dec 202584 flights77.4%
Jan–Mar 202652 flights73.5%
Apr–Jun 202686 flights90.7%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, UA 2441 did best on Tuesday at 91.9% on time and worst on Saturday at 76.6%. Each day rests on about 45 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 2441 runs late

One category carries most of the weight here. Carrier accounts for 48% of the 2,144 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
48%
National Airspace System
46%
Late-arriving aircraft
5%
Extreme weather
0%

The largest share of delay minutes, 48%, 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 1,038 of the 2,144 delay minutes reported here. The split is drawn from 2,144 delay minutes reported on UA 2441.

Cancellations sit at 0.96% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 2.6% 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 2,704 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 eight other city pairs in the data, including SFO to PHX (55), SFO to SNA (53) and SFO to BUR (49), but none flew often enough under UA 2441 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BOS to SFO only.

One caution: this is a thin sample. 313 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 2441

For a booking, read UA 2441 as 83.5% on time with 0.96% cancelled over 313 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