Flight number record
UA 534
United Airlines · Chicago to Newark
- Route
- ORD → EWR
- Departs
- 18:05
- Flights
- 329
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 534, check with United Airlines.
UA 534 earns a D−, which is as low as this site's scale goes for a reason. Only 56.7% of flights arrive inside the 15-minute window, 21 points worse than the national rate of 77.6%. Late arrivals average an hour and a half. Treat any tight connection here as a coin flip. That rests on 329 flights, with a median arrival 7 minutes late.
The national on-time rate over the same period is 77.6%, so UA 534 runs 21 points behind the country as a whole. Across a thousand flights that is about 209 extra late arrivals.
Key figures
On time
56.7%
Arrivals under 15 minutes late, of 319 completed flights
Avg delay
91 min
Across delayed arrivals only, not all flights
Cancelled
3.04%
National rate is 1.81%
1 hour+ late
21.0%
National rate is 8.1%
These figures cover 329 flights between July 2025 and June 2026. Beyond the headline rate, 21.0% 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.
Schedule
When UA 534 flies
UA 534 flies ORD to EWR without a single fixed slot. Its most common scheduled departure was 18:05, used on 51 of 329 flights, with 17:55 (48 flights) and 18:15 (34 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 18:0551 flights15.5%
- Departs 17:5548 flights14.6%
- Departs 18:1534 flights10.3%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 18:05 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and UA 534 runs 12 points worse at 56.7%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Against the route
UA 534 next to ORD to EWR
Every carrier on ORD to EWR combined arrived on time 69.4% of the time across 6,044 flights, so UA 534 is 13 points behind it. United flew 4,391 flights on the same city pair under all its flight numbers, including this one, and those ran 71.3% on time. Across its whole network United Airlines managed 79.0%, which this flight trails by 22 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 534thin sample | 329 | 56.7% | 91 min | 3.04% | D− |
| All United Airlines on ORD–EWR | 4,391 | 71.3% | 86 min | 2.37% | C |
| All carriers on ORD–EWR | 6,044 | 69.4% | 83 min | 3.26% | C− |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 534 quarter by quarter
UA 534 did not run the same all year. Its best quarter was Apr–Jun 2026 at 64.1% on time and its weakest Jul–Sep 2025 at 50.0%, a swing of 14 points on roughly 82 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.
- Jul–Sep 202592 flights50.0%
- Oct–Dec 202591 flights53.3%
- Jan–Mar 202666 flights61.9%
- Apr–Jun 202680 flights64.1%
Scale runs 40% to 70%. Rows with fewer than 30 flights show a dash.
By weekday, UA 534 did best on Friday at 67.4% on time and worst on Thursday at 44.2%. Each day rests on about 47 flights, so a gap of 23 points is worth noticing but could still narrow in another year.
Delay causes
Why UA 534 runs late
One category carries most of the weight here. National Airspace System accounts for 46% of the 12,000 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.
- 46%National Airspace System
- 34%Late-arriving aircraft
- 12%Carrier
- 8%Extreme weather
46% 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 5,685 minutes out of 12,000, against a national NAS share of 21%. The split is drawn from 12,494 delay minutes reported on UA 534.
Cancellations run at 3.04%, against 1.81% 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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 21.0% 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 same number turns up on four other city pairs in the data, including PDX to ORD (152), FLL to ORD (24) and ORD to LGA (24), but none flew often enough under UA 534 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to EWR only.
One caution: this is a thin sample. 329 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 534
For a booking, the cancellation rate is the figure to plan around on UA 534: 3.04% of its 329 scheduled flights did not operate. A late arrival costs an hour and a half, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- ORD to EWR, every carrier and departure
- EWR to ORD, the return direction
- United Airlines 563 on the same route90.1%
- United Airlines 1209 on the same route68.0%
- Chicago O'Hare International (ORD) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.