Flight number record
UA 2441
United Airlines · Boston to San Francisco
- Route
- BOS → SFO
- Departs
- 06:00
- Flights
- 304
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2441, check with United Airlines.
UA 2441 earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 45 minutes. That rests on 304 flights, with a median arrival 6 minutes early.
Set against the rest of the country, UA 2441's record is 7 points better than the US average of 77.3%. That gap is worth roughly 71 fewer late arrivals for every thousand flights.
Key figures
On time
84.4%
Arrivals under 15 minutes late, of 301 completed flights
Avg delay
43 min
Across delayed arrivals only, not all flights
Cancelled
0.99%
National rate is 1.89%
1 hour+ late
2.7%
National rate is 8.3%
These figures cover 304 flights between September 2025 and August 2026. The median arrival is 6 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 2441 flies
UA 2441 flies BOS to SFO without a single fixed slot. Its most common scheduled departure was 06:00, used on 228 of 304 flights.
- Departs 06:00228 flights75.0%
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 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 5 points worse at 84.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
UA 2441 next to BOS to SFO
Every carrier on BOS to SFO combined arrived on time 69.2% of the time across 4,817 flights, so UA 2441 is 15 points ahead of it. United flew 1,940 flights on the same city pair under all its flight numbers, including this one, and those ran 72.5% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2441thin sample | 304 | 84.4% | 43 min | 0.99% | B+ |
| All United Airlines on BOS–SFO | 1,940 | 72.5% | 66 min | 1.19% | C |
| All carriers on BOS–SFO | 4,817 | 69.2% | 66 min | 1.58% | C |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2441 quarter by quarter
UA 2441 did not run the same all year. Its best quarter was Jul–Sep 2026 at 94.3% on time and its weakest Jan–Mar 2026 at 73.5%, a swing of 21 points on roughly 76 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 202529 flights—
- Oct–Dec 202584 flights77.4%
- Jan–Mar 202652 flights73.5%
- Apr–Jun 202686 flights90.7%
- Jul–Sep 202653 flights94.3%
Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 2441 did best on Tuesday at 90.9% on time and worst on Sunday at 78.3%. Each day rests on about 43 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2441 runs when it is late
UA 2441 often beats the schedule: 84 of 301 completed flights, 28%, arrived 15 minutes or more early. Most of the lateness is short. 29 of the 47 late arrivals were under half an hour behind, and 8 reached an hour or more.
- 15+ min early84 flights27.9%
- Within 15 min170 flights56.5%
- 15–29 min late29 flights9.6%
- 30–59 min late10 flights3.3%
- 1–2 hours late6 flights2.0%
- 2+ hours late2 flights0.7%
Scale runs 0% to 100%.
Share of 301 completed flights by arrival against schedule.
A late pushback is often recovered here: of 20 departures that left 15 minutes late or more, 6 still arrived on time. In the other direction, 33 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SFO.
The worst days
Worst days for UA 2441
The latest arrival of the period was on 16 November 2025, 5 hours 37 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 16 November 2025 | 5 hours 37 minutes | Carrier |
| 16 March 2026 | 2 hours 39 minutes | Carrier |
| 30 November 2025 | 1 hour 54 minutes | Late-arriving aircraft |
| 2 June 2026 | 1 hour 24 minutes | Carrier |
| 29 December 2025 | 1 hour 17 minutes | Carrier |
Delay causes
Why UA 2441 runs late
Carrier accounts for 48% of the 2,025 delay minutes carriers reported here, and the remaining four split what is left.
- 48%Carrier
- 47%National Airspace System
- 5%Late-arriving aircraft
- 0%Extreme weather
The largest share of delay minutes, 48%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 963 of the 2,025 delay minutes reported here. The split is drawn from 2,025 delay minutes reported on UA 2441.
Cancellations sit at 0.99% against a national 1.89%, 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 2.7% 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 2,704 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 seven other city pairs in the data, including SFO to SNA (74), SFO to PHX (55) and MCO to EWR (37), 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. 304 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 84.4% on time with 0.99% cancelled over 304 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- BOS to SFO, every carrier and departure
- SFO to BOS, the return direction
- Delta Air Lines 1655 on the same route66.1%
- JetBlue Airways 733 on the same route55.9%
- United Airlines 2400 on the same route51.1%
- JetBlue Airways 333 on the same route54.3%
- United Airlines 1074 on the same route77.8%
- Boston Logan International (BOS) delay statistics
- San Francisco International (SFO) 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
- Worst months to fly in the US, ranked by the data
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.