Route reliability record
PHX→EWR
Phoenix to Newark
- Flights
- 2,489
- Period
- July 2025 to June 2026
- Distance
- 2,133 mi
- Carriers
- 2
This route lands a B, 2 points better than the national rate of 77.6%. About one flight in five arrive 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 2,489 flights, of which United Airlines flew 1,494 at 81.4% on time.
The US average over the same twelve months is 77.6%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
79.5%
Arrivals under 15 minutes late, of 2,425 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
1.93%
National rate is 1.81%
Best carrier
United
81.4% on time across 1,494 flights
These figures cover 2,489 flights between July 2025 and June 2026. Beyond the headline rate, 8.1% 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
Which airline is most reliable on PHX to EWR
The two carriers here are closely matched: 5 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines | 1,494 | 81.4% | 78 min | 1.81% | B |
| American Airlines | 995 | 76.7% | 67 min | 2.11% | B |
No carrier stands out. United tops the table at 81.4%, 5 points clear of the bottom, which is inside the range this kind of sample moves year to year.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 27 points, against 5 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am243 flights95.8%
- 8am–11am665 flights78.6%
- 11am–2pm284 flights69.3%
- 2pm–5pm558 flights71.0%
- 5pm–8pm123 flights81.9%
- 8pm–5am616 flights86.0%
Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.
The weak window here is the middle of the day, not the evening: 11am–2pm runs 69.3% on time against 95.8% for 5am–8am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 8am–11am window is the busiest, with 665 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 24 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
August is the worst month at 67.0% on time, 24 points below April, the best at 91.3%. 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. December was the busiest month here, with 236 flights.
Across the week, Tuesday is the strongest day at 85.1% on time and Sunday the weakest at 73.2%. 12 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
One category carries most of the weight here. National Airspace System accounts for 45% of the 36,000 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.
- 45%National Airspace System
- 27%Late-arriving aircraft
- 24%Carrier
- 4%Extreme weather
- 0%Security
45% 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 16,000 minutes out of 36,000, against a national NAS share of 21%. The split is drawn from 36,167 reported delay minutes.
Cancellations sit at 1.93% against a national 1.81%, which is ordinary. Diversions add another 0.64%.
Connections and stage length
What a delay here actually costs
8.1% 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 are the a little over an hour kind, which a normal layover absorbs.
At 2,133 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 80.0% on time across 2,489 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 2,489 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 this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. April runs 91.3% on time and August 67.0%, a swing of 24 points. If the dates move at all, move them out of August before you think about anything else. 2,425 completed flights over 12 months sit behind that.
Common questions
PHX to EWR questions
How often is PHX to EWR delayed?
About one flight in five arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 20.5% of the 2,489 flights in this analysis, against 22.4% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on PHX to EWR?
United Airlines leads at 81.4% on time across 1,494 flights. American Airlines is at the other end on 76.7%, a gap of 5 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on PHX to EWR?
The 5am–8am departure window is the strongest at 95.8% on time. The 11am–2pm window is the weakest at 69.3%, 27 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are August delays on PHX to EWR?
August is the weakest month at 67.0% on time, compared with 91.3% in April. Across the year that is 24 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- EWR to PHX — the return legseparate record
- Phoenix Sky Harbor International (PHX) delay statistics
- Newark Liberty International (EWR) delay statistics
- United Airlines on-time record81.4%
- American Airlines on-time record76.7%
- The best time of day to fly, according to 7.04 million flight records
- Worst months to fly in the US, ranked by the data
Direction matters. PHX to EWR and EWR to PHX are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Updated monthly. How this data is collected.