Carrier route record
UAEWR→PWM
United Airlines · Newark to Portland
- Flights
- 159
- Period
- July 2025 to June 2026
- Share of route
- 16%
- Carriers
- 2
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with United Airlines.
United on EWR to PWM earns a D−, which is as low as this site's scale goes for a reason. Only 56.4% of flights arrive inside the 15-minute window, 21 points worse than the national rate of 77.6%. Late arrivals average a little over an hour. Treat any tight connection here as a coin flip. That rests on 159 flights, with a median arrival 9 minutes late.
The national on-time rate over the same period is 77.6%, so United on EWR to PWM runs 21 points behind the country as a whole. Across a thousand flights that is about 212 extra late arrivals.
Key figures
On time
56.4%
Arrivals under 15 minutes late, of 149 completed flights
Avg delay
79 min
Across delayed arrivals only, not all flights
Cancelled
5.66%
National rate is 1.81%
Whole route
81.9%
Every carrier on EWR to PWM, 984 flights
These figures cover 159 flights between July 2025 and June 2026. Beyond the headline rate, 18.1% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
United against every carrier on EWR to PWM
United flew 159 of the 984 flights on EWR to PWM, about 16% of it. Its 56.4% on time is 26 points worse than the route as a whole, which runs 81.9%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from Republic at 86.6% to United at 56.4%.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Republic Airways | 825 | 86.6% | 66 min | 2.91% | A |
| United Airlines (this page)thin sample | 159 | 56.4% | 79 min | 5.66% | D− |
Departure window
When United runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 159 flights.
There are not enough flights in each departure window to split United's EWR to PWM record by time of day without the percentages moving on noise. The headline rate of 56.4% is the reliable figure here.
Across the year
United on EWR to PWM through the year
- Jul–Sep 202552 flights46.7%
- Oct–Dec 202566 flights56.9%
- Jan–Mar 202638 flights66.7%
- Apr–Jun 20263 flights—
Scale runs 40% to 70%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 56.4% on time across 159 flights.
United on EWR to PWM did not run the same all year. Its best quarter was Jan–Mar 2026 at 66.7% on time and its weakest Jul–Sep 2025 at 46.7%, a swing of 20 points on roughly 53 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.
Delay causes
Why United runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 68% of the 5,126 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.
- 68%Late-arriving aircraft
- 22%Carrier
- 10%National Airspace System
68% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 5,126 reported delay minutes here, that single category outweighs weather by 68 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 5,126 reported delay minutes.
Cancellations run at 5.66%, against 1.81% nationally. That is roughly one flight in twenty 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 stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 18.1% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
At 284 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 8pm–5am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 87.4% on time across 151 flights, 31 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 31 points of difference.
One caution: this is a thin sample. 159 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 United on EWR to PWM
Put together: the delay figures matter less here than the 5.66% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 8pm–5am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 149 completed flights over 12 months sit behind that.
Related
Where to go next
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.