Carrier route record
UAORD→EWR
United Airlines · Chicago to Newark
- Flights
- 4,415
- Period
- September 2025 to August 2026
- Share of route
- 72%
- Carriers
- 5
Historical statistics for September 2025 to August 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, 5 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 4,415 flights. The strongest carrier on the route with a full sample, Envoy Air, flew 533 at 78.0% on time.
The national on-time rate over the same period is 77.3%, so United on ORD to EWR runs 5 points behind the country as a whole. Across a thousand flights that is about 53 extra late arrivals.
Key figures
On time
72.0%
Arrivals under 15 minutes late, of 4,274 completed flights
Avg delay
89 min
Across delayed arrivals only, not all flights
Cancelled
2.85%
National rate is 1.89%
Whole route
69.8%
Every carrier on ORD to EWR, 6,126 flights
These figures cover 4,415 flights between September 2025 and August 2026. Beyond the headline rate, 12.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
United against every carrier on ORD to EWR
United flew 4,415 of the 6,126 flights on ORD to EWR, most of the route. Its 72.0% on time is 2 points better than the route as a whole, which runs 69.8%. Ranked by on-time rate it is number two of five carriers on the route, where the range runs from Envoy at 78.0% to Spirit at 45.6%. 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 78.0% of the time; American Airlines manages 59.0%. Sample sizes sit next to every figure, because a two-point gap across 926 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Air | 533 | 78.0% | 60 min | 5.82% | B− |
| United Airlines (this page) | 4,415 | 72.0% | 89 min | 2.85% | C |
| Republic Airwaysthin sample | 102 | 60.2% | 83 min | 7.84% | D− |
| American Airlines | 926 | 59.0% | 87 min | 4.97% | D− |
| Spirit Airlinesthin sample | 150 | 45.6% | 79 min | 15.33% | F− |
Envoy Air cancels 5.8% 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
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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 33 points, against 19 points between the best and worst carrier.
- 5am–8am808 flights91.9%
- 8am–11am520 flights78.4%
- 11am–2pm916 flights71.5%
- 2pm–5pm1,018 flights64.9%
- 5pm–8pm671 flights59.1%
- 8pm–5am482 flights64.5%
Scale runs 50% to 95%.
The 5pm–8pm window is where this operation falls apart: 59.1% on time, against 91.9% 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 1,018 flights scheduled in it.
Across the year
United on ORD to EWR through the year
August is the worst month at 61.8% on time, 23 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 76.3% on time and Sunday the weakest at 67.2%, a spread of 9 points.
Arrival by arrival
How late United on ORD to EWR runs when it is late
United on ORD to EWR often beats the schedule: 1,206 of 4,274 completed flights, 28%, arrived 15 minutes or more early. The 1,198 late arrivals split 351 under half an hour, 305 between 30 and 60 minutes, and 542 an hour or more.
- 15+ min early1,206 flights28.2%
- Within 15 min1,870 flights43.8%
- 15–29 min late351 flights8.2%
- 30–59 min late305 flights7.1%
- 1–2 hours late269 flights6.3%
- 2+ hours late273 flights6.4%
Scale runs 0% to 100%.
Share of 4,274 completed flights by arrival against schedule.
246 of 1,216 late departures made up the time and arrived on time, 20% of them. In the other direction, 228 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 United on ORD to EWR
The latest arrival of the period was on 22 May 2026, 15 hours 35 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 July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 22 May 2026 | 15 hours 35 minutes | Carrier |
| 29 November 2025 | 11 hours 57 minutes | Late-arriving aircraft |
| 21 July 2026 | 11 hours 15 minutes | Late-arriving aircraft |
| 27 July 2026 | 10 hours 20 minutes | National Airspace System |
| 9 July 2026 | 9 hours 14 minutes | National Airspace System |
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 107,000 reported delay minutes.
- 40%National Airspace System
- 36%Late-arriving aircraft
- 19%Carrier
- 6%Extreme weather
36% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 107,000 reported delay minutes here, that single category outweighs weather by 6 to one. The split is drawn from 107,046 reported delay minutes.
40% 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 107,000, against a national NAS share of 21%.
Cancellations run at 2.85%, against 1.89% nationally. That is roughly one flight in 40 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
12.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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.
The return leg runs 70.3% on time across 4,415 flights, within 2 points 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 4,415 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 delay figures matter less here than the 2.85% cancellation rate. A late arrival costs you an hour and a half; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 4,274 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 EWR78.0%
- Republic Airways on ORD to EWR60.2%
- American Airlines on ORD to EWR59.0%
- Spirit Airlines on ORD to EWR45.6%
- United Airlines network-wide record
- Chicago O'Hare International (ORD) delay statistics
- Newark Liberty International (EWR) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
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.