Carrier route record
UAEWR→SLC
United Airlines · Newark to Salt Lake City
- Flights
- 615
- Period
- July 2025 to June 2026
- Share of route
- 46%
- 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 SLC lands a B, level with the national rate of 77.6%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 615 flights, with a median arrival 4 minutes early.
The US average over the same twelve months is 77.6%, so there is little to separate United on EWR to SLC from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
77.7%
Arrivals under 15 minutes late, of 601 completed flights
Avg delay
60 min
Across delayed arrivals only, not all flights
Cancelled
2.11%
National rate is 1.81%
Whole route
76.6%
Every carrier on EWR to SLC, 1,337 flights
These figures cover 615 flights between July 2025 and June 2026. The median arrival is 4 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.
Carrier by carrier
United against every carrier on EWR to SLC
United flew 615 of the 1,337 flights on EWR to SLC, about 46% of it. Its 77.7% on time is about level with the route as a whole at 76.6%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from United at 77.7% to Delta at 75.6%.
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 |
|---|---|---|---|---|---|
| United Airlines (this page) | 615 | 77.7% | 60 min | 2.11% | B |
| Delta Air Lines | 722 | 75.6% | 88 min | 2.22% | B |
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 27 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am158 flights87.3%
- 8am–11am128 flights92.6%
- 11am–2pm22 flights—
- 2pm–5pm73 flights69.0%
- 5pm–8pm58 flights65.5%
- 8pm–5am176 flights67.3%
Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 92.6% of the time, against 65.5% for the evening window. That is 27 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 176 flights scheduled in it.
Across the year
United on EWR to SLC through the year
Delays peak in November, when the on-time rate falls to 56.7%. August is the strongest month at 93.5%. Moving a flexible trip across that boundary buys 37 points. March was the busiest month here, with 105 flights.
Across the week, Wednesday is the strongest day at 82.8% on time and Sunday the weakest at 72.9%. 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 7,988 reported delay minutes.
- 41%Late-arriving aircraft
- 31%Carrier
- 26%National Airspace System
- 2%Extreme weather
41% 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 7,988 reported delay minutes here, that single category outweighs weather by 18 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 7,988 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 92.6% on time here.
Cancellations sit at 2.11% against a national 1.81%, which is ordinary. Diversions add another 0.16%.
Connections and stage length
What a delay here costs
6.5% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
At 1,969 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The return leg runs 77.9% on time across 615 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.
One caution: this is a thin sample. 615 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 SLC
Put together: treat all of this as provisional. 615 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 77.7% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 601 completed flights over 12 months sit behind that.
Related
Where to go next
- EWR to SLC, every carrier
- United on SLC to EWR, the return leg
- Delta Air Lines on EWR to SLC75.6%
- United Airlines network-wide record
- Newark Liberty International (EWR) delay statistics
- Salt Lake City International (SLC) delay statistics
- Why the first flight of the morning is statistically safest
- 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.