Carrier route record
UAEWR→SLC
United Airlines · Newark to Salt Lake City
- Flights
- 615
- Period
- September 2025 to August 2026
- Share of route
- 46%
- Carriers
- 2
Historical statistics for September 2025 to August 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 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 615 flights, with a median arrival 3 minutes early.
The US average over the same twelve months is 77.3%, 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
77.0%
Arrivals under 15 minutes late, of 601 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
2.11%
National rate is 1.89%
Whole route
76.9%
Every carrier on EWR to SLC, 1,338 flights
These figures cover 615 flights between September 2025 and August 2026. The median arrival is 3 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.
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Carrier by carrier
United against every carrier on EWR to SLC
United flew 615 of the 1,338 flights on EWR to SLC, about 46% of it. Its 77.0% on time is about level with the route as a whole at 76.9%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from United at 77.0% to Delta at 76.7%.
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 | 77.0% | 62 min | 2.11% | B |
| Delta Air Lines | 723 | 76.7% | 89 min | 2.35% | B |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
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.
- 5am–8am158 flights84.7%
- 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%. July is the strongest month at 96.8%. Moving a flexible trip across that boundary buys 40 points. March was the busiest month here, with 105 flights.
Across the week, Wednesday is the strongest day at 81.6% on time and Sunday the weakest at 71.8%, a spread of 10 points.
Arrival by arrival
How late United on EWR to SLC runs when it is late
United on EWR to SLC often beats the schedule: 175 of 601 completed flights, 29%, arrived 15 minutes or more early. The 138 late arrivals split 51 under half an hour, 43 between 30 and 60 minutes, and 44 an hour or more.
- 15+ min early175 flights29.1%
- Within 15 min288 flights47.9%
- 15–29 min late51 flights8.5%
- 30–59 min late43 flights7.2%
- 1–2 hours late28 flights4.7%
- 2+ hours late16 flights2.7%
Scale runs 0% to 100%.
Share of 601 completed flights by arrival against schedule.
35 of 138 late departures made up the time and arrived on time, 25% of them. In the other direction, 35 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 SLC.
The worst days
Worst days for United on EWR to SLC
The latest arrival of the period was on 14 June 2026, 7 hours 38 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 June 2026 | 7 hours 38 minutes | Late-arriving aircraft |
| 22 March 2026 | 6 hours 16 minutes | Carrier |
| 23 August 2026 | 4 hours 24 minutes | Late-arriving aircraft |
| 13 June 2026 | 3 hours 30 minutes | Late-arriving aircraft |
| 20 December 2025 | 3 hours 25 minutes | Late-arriving aircraft |
Delay causes
Why United runs late on this route
Late-arriving aircraft accounts for 44% of the 8,541 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Late-arriving aircraft
- 28%Carrier
- 25%National Airspace System
- 2%Extreme weather
44% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 8,541 reported delay minutes here, that single category outweighs weather by 21 to one. The split is drawn from 8,541 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 1.89%, which is ordinary. Diversions add another 0.16%.
Connections and stage length
What a delay here costs
7.3% of arrivals land an hour or more late, close to the national 8.3%, so 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 78.4% on time across 615 flights, within about 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 77.0% 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 SLC76.7%
- 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 7.05 million flight records
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.