Flight number record
UA 2394
United Airlines · Boston to Newark
- Route
- BOS → EWR
- Departs
- 10:30
- Flights
- 264
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2394, check with United Airlines.
UA 2394 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 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 264 flights, with a median arrival 14 minutes early.
Set against the rest of the country, UA 2394's record is 10 points better than the US average of 77.3%. That gap is worth roughly 98 fewer late arrivals for every thousand flights.
Key figures
On time
87.1%
Arrivals under 15 minutes late, of 255 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
3.03%
National rate is 1.89%
1 hour+ late
5.5%
National rate is 8.3%
These figures cover 264 flights between September 2025 and August 2026. The median arrival is 14 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 2394 flies
UA 2394 flies BOS to EWR without a single fixed slot. Its most common scheduled departure was 10:30, used on 92 of 264 flights, with 10:58 (32 flights) and 10:05 (30 flights) next.
- Departs 10:3092 flights34.8%
- Departs 10:5832 flights12.1%
- Departs 10:0530 flights11.4%
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 10:30 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and UA 2394 runs 3 points better at 87.1%. 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 2394 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 2394 is 11 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 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2394thin sample | 264 | 87.1% | 81 min | 3.03% | 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 2394 quarter by quarter
UA 2394 did not run the same all year. Its best quarter was Jan–Mar 2026 at 92.2% on time and its weakest Jul–Sep 2026 at 79.5%, a swing of 13 points on roughly 66 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.
- Oct–Dec 202552 flights79.6%
- Jan–Mar 202681 flights92.2%
- Apr–Jun 202690 flights90.0%
- Jul–Sep 202641 flights79.5%
Scale runs 70% to 100%.
By weekday, UA 2394 did best on Saturday at 96.8% on time and worst on Monday at 69.4%. Each day rests on about 38 flights, so a gap of 27 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2394 runs when it is late
UA 2394 often beats the schedule: 119 of 255 completed flights, 47%, arrived 15 minutes or more early. The 33 late arrivals split 9 under half an hour, 10 between 30 and 60 minutes, and 14 an hour or more.
- 15+ min early119 flights46.7%
- Within 15 min103 flights40.4%
- 15–29 min late9 flights3.5%
- 30–59 min late10 flights3.9%
- 1–2 hours late10 flights3.9%
- 2+ hours late4 flights1.6%
Scale runs 0% to 100%.
Share of 255 completed flights by arrival against schedule.
4 of 24 late departures made up the time and arrived on time, 17% of them. In the other direction, 13 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 EWR.
The worst days
Worst days for UA 2394
The latest arrival of the period was on 26 November 2025, 8 hours 42 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in November 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 26 November 2025 | 8 hours 42 minutes | Carrier |
| 14 December 2025 | 4 hours 45 minutes | National Airspace System |
| 3 August 2026 | 4 hours 18 minutes | Late-arriving aircraft |
| 5 November 2025 | 2 hours 15 minutes | Late-arriving aircraft |
| 6 November 2025 | 1 hour 52 minutes | National Airspace System |
Delay causes
Why UA 2394 runs late
National Airspace System accounts for 44% of the 2,669 delay minutes carriers reported here, and the remaining four split what is left.
- 44%National Airspace System
- 32%Late-arriving aircraft
- 24%Carrier
44% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 1,161 minutes out of 2,669, against a national NAS share of 21%. The split is drawn from 2,669 delay minutes reported on UA 2394.
Cancellations run at 3.03%, against 1.89% nationally. That is roughly one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
5.5% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
The same number turns up on seven other city pairs in the data, including EWR to ORD (76), EWR to SRQ (70) and ORD to DEN (55), but none flew often enough under UA 2394 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. 264 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 2394
For a booking, the cancellation rate is the figure to plan around on UA 2394: 3.03% of its 264 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
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 570 on the same route89.4%
- 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
- Why the first flight of the morning is statistically safest
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.