Flight number record
UA 570
United Airlines · Boston to Newark
- Route
- BOS → EWR
- Departs
- 08:00
- Flights
- 288
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 570, check with United Airlines.
UA 570 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 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 288 flights, with a median arrival 13 minutes early.
Set against the rest of the country, UA 570's record is 12 points better than the US average of 77.3%. That gap is worth roughly 121 fewer late arrivals for every thousand flights.
Key figures
On time
89.4%
Arrivals under 15 minutes late, of 284 completed flights
Avg delay
89 min
Across delayed arrivals only, not all flights
Cancelled
1.39%
National rate is 1.89%
1 hour+ late
3.5%
National rate is 8.3%
These figures cover 288 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.
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Schedule
When UA 570 flies
UA 570 flies BOS to EWR without a single fixed slot. Its most common scheduled departure was 08:00, used on 77 of 288 flights, with 07:05 (75 flights) and 07:30 (56 flights) next.
- Departs 08:0077 flights26.7%
- Departs 07:0575 flights26.0%
- Departs 07:3056 flights19.4%
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 08:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and UA 570 runs 6 points better at 89.4%. 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 570 next to BOS to EWR
Every carrier on BOS to EWR combined arrived on time 75.7% of the time across 3,860 flights, so UA 570 is 14 points ahead of it. United flew 2,695 flights on the same city pair under all its flight numbers, including this one, and those ran 75.8% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 570thin sample | 288 | 89.4% | 89 min | 1.39% | A |
| All United Airlines on BOS–EWR | 2,695 | 75.8% | 88 min | 3.53% | B− |
| All carriers on BOS–EWR | 3,860 | 75.7% | 82 min | 4.51% | B− |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 570 quarter by quarter
Quarter by quarter UA 570 held fairly steady: 86.7% in Jul–Sep 2025, 89.1% in Oct–Dec 2025, 88.0% in Jan–Mar 2026, 93.1% in Apr–Jun 2026 and 87.1% 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 flights86.7%
- Oct–Dec 202555 flights89.1%
- Jan–Mar 202653 flights88.0%
- Apr–Jun 202688 flights93.1%
- Jul–Sep 202662 flights87.1%
Scale runs 80% to 100%.
By weekday, UA 570 ranged from 84.2% on Saturday to 95.0% on Tuesday. With about 41 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late UA 570 runs when it is late
UA 570 often beats the schedule: 124 of 284 completed flights, 44%, arrived 15 minutes or more early. The 30 late arrivals split 13 under half an hour, 7 between 30 and 60 minutes, and 10 an hour or more.
- 15+ min early124 flights43.7%
- Within 15 min130 flights45.8%
- 15–29 min late13 flights4.6%
- 30–59 min late7 flights2.5%
- 1–2 hours late5 flights1.8%
- 2+ hours late5 flights1.8%
Scale runs 0% to 100%.
Share of 284 completed flights by arrival against schedule.
Only 19 of 284 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for UA 570
The latest arrival of the period was on 7 June 2026, 8 hours 39 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across June, August, December and March, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 June 2026 | 8 hours 39 minutes | Carrier |
| 3 August 2026 | 7 hours 32 minutes | Extreme weather |
| 7 December 2025 | 6 hours 59 minutes | Carrier |
| 14 December 2025 | 3 hours 11 minutes | National Airspace System |
| 23 March 2026 | 2 hours 12 minutes | National Airspace System |
Delay causes
Why UA 570 runs late
Carrier accounts for 50% of the 2,677 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Carrier
- 28%National Airspace System
- 14%Extreme weather
- 8%Late-arriving aircraft
Extreme weather accounts for 14% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.4 times the usual weather exposure. The split is drawn from 2,677 delay minutes reported on UA 570.
Cancellations sit at 1.39% 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 3.5% 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.
The same number turns up on five other city pairs in the data, including EWR to SAV (117), ATL to ORD (37) and ORD to MSY (37), but none flew often enough under UA 570 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BOS to EWR only.
One caution: this is a thin sample. 288 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 570
For a booking, UA 570 has one of the better records a US domestic flight can show: 89.4% on time and 1.39% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- BOS to EWR, every carrier and departure
- EWR to BOS, the return direction
- United Airlines 1833 on the same route92.8%
- Republic Airways 5718 on the same route61.1%
- United Airlines 2394 on the same route87.1%
- Boston Logan International (BOS) delay statistics
- Newark Liberty International (EWR) 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.