Carrier route record
UAORD→EWR
United Airlines · Chicago to Newark
- Flights
- 4,391
- Period
- July 2025 to June 2026
- Share of route
- 73%
- Carriers
- 5
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with United Airlines.
United on ORD to EWR sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 4,391 flights. The strongest carrier on the route with a full sample, Envoy Air, flew 657 at 79.3% on time.
The national on-time rate over the same period is 77.6%, so United on ORD to EWR runs 6 points behind the country as a whole. Across a thousand flights that is about 63 extra late arrivals.
Key figures
On time
71.3%
Arrivals under 15 minutes late, of 4,278 completed flights
Avg delay
86 min
Across delayed arrivals only, not all flights
Cancelled
2.37%
National rate is 1.81%
Whole route
69.4%
Every carrier on ORD to EWR, 6,044 flights
These figures cover 4,391 flights between July 2025 and June 2026. Beyond the headline rate, 12.8% 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 ORD to EWR
United flew 4,391 of the 6,044 flights on ORD to EWR, most of the route. Its 71.3% on time is 2 points better than the route as a whole, which runs 69.4%. Ranked by on-time rate it is number two of five carriers on the route, where the range runs from Envoy at 79.3% to Spirit at 43.2%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Envoy Air arrives on time 79.3% of the time; American Airlines manages 55.6%. Sample sizes sit next to every figure, because a two-point gap across 737 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Air | 657 | 79.3% | 62 min | 5.18% | B− |
| United Airlines (this page) | 4,391 | 71.3% | 86 min | 2.37% | C |
| Republic Airwaysthin sample | 102 | 60.2% | 83 min | 7.84% | D− |
| American Airlines | 737 | 55.6% | 83 min | 3.80% | D− |
| Spirit Airlinesthin sample | 157 | 43.2% | 80 min | 14.65% | F− |
Envoy Air cancels 5.2% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Flight by flight
United flight numbers on ORD to EWR
Departure window
When United runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 34 points, against 24 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am787 flights91.7%
- 8am–11am554 flights77.9%
- 11am–2pm875 flights71.3%
- 2pm–5pm1,029 flights64.2%
- 5pm–8pm699 flights57.8%
- 8pm–5am447 flights64.6%
Scale runs 50% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 57.8% on time, against 91.7% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 2pm–5pm window is the busiest, with 1,029 flights scheduled in it.
Across the year
United on ORD to EWR through the year
July is the worst month at 53.0% on time, 32 points below May, the best at 85.2%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. May was the busiest month here, with 396 flights.
Across the week, Tuesday is the strongest day at 75.8% on time and Sunday the weakest at 65.8%. 10 points is a smaller lever than departure hour, but it is free.
Delay causes
Why United runs late on this route
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 105,000 reported delay minutes.
- 41%National Airspace System
- 31%Late-arriving aircraft
- 21%Carrier
- 8%Extreme weather
41% 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 43,000 minutes out of 105,000, against a national NAS share of 21%. The split is drawn from 105,130 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 91.7% on time here.
Cancellations sit at 2.37% against a national 1.81%, which is ordinary. Diversions add another 0.20%.
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. 12.8% 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.
The 719 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg runs 71.1% on time across 4,389 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 4,391 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking United on ORD to EWR
Put together: the calendar is the biggest lever here, not the carrier or the hour. May runs 85.2% on time and July 53.0%, a swing of 32 points. If the dates move at all, move them out of July before you think about anything else. 4,278 completed flights over 12 months sit behind that.
Related
Where to go next
- ORD to EWR, every carrier
- United on EWR to ORD, the return leg
- Envoy Air on ORD to EWR79.3%
- Republic Airways on ORD to EWR60.2%
- American Airlines on ORD to EWR55.6%
- Spirit Airlines on ORD to EWR43.2%
- United Airlines network-wide record
- Chicago O'Hare International (ORD) delay statistics
- Newark Liberty International (EWR) delay statistics
- Same route, different airline: where the carrier you pick matters most
- The best time of day to fly, according to 7.04 million flight records
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.