Route reliability record
EWR→PHX
Newark to Phoenix
- Flights
- 2,485
- Period
- September 2025 to August 2026
- Distance
- 2,133 mi
- Carriers
- 2
This route lands a B, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 2,485 EWR to PHX flights, of which United Airlines flew 1,483 at 80.3% on time.
Best time to fly EWR to PHX: a 5am–8am departure, ideally on a Wednesday. Flights in that window arrived on time 86.1% of the time and Wednesday flights 83.6%, against 78.9% for the route overall.
The US average over the same twelve months is 77.3%, 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
78.9%
Arrivals under 15 minutes late, of 2,418 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
2.37%
National rate is 1.89%
Best carrier
United
80.3% on time across 1,483 flights
These figures cover 2,485 flights between September 2025 and August 2026. The median arrival is 9 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
Which airline is most reliable on EWR to PHX
The two carriers here are closely matched: 3 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 | 1,483 | 80.3% | 73 min | 2.23% | B |
| American Airlines | 1,002 | 76.9% | 90 min | 2.59% | B |
No carrier stands out. United tops the table at 80.3%, 3 points clear of the bottom, which is inside the range this kind of sample moves year to year.
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Best ways to make this trip
The most reliable ways to fly Newark to Phoenix
Every airline on this route and on the routes between nearby airports, ranked by how often a scheduled flight actually operated and arrived on time. 3 of the top 5 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. EWR → PHXNewark to Phoenix | United Airlines | 78.5% | 80.3% | 2.23% | 5am–8am, Wed | — |
| 2. JFK → PHXNew York to Phoenix | American Airlines | 77.2% | 79.3% | 2.67% | 5am–8am, Tue | AA 2829 12:29 |
| 3. EWR → PHXNewark to Phoenix | American Airlines | 74.9% | 76.9% | 2.59% | 5am–8am, Fri | — |
| 4. JFK → PHXNew York to Phoenix | Delta Air Lines | 70.2% | 72.7% | 3.48% | 8am–11am, Sat | DL 791 08:00 |
| 5. JFK → PHXNew York to Phoenix | JetBlue Airways | 69.4% | 72.8% | 4.71% | 5am–8am, Fri | — |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
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 18 points, against 3 points between the best and worst carrier.
- 5am–8am588 flights86.1%
- 8am–11am397 flights77.7%
- 11am–2pm430 flights85.7%
- 2pm–5pm241 flights73.7%
- 5pm–8pm528 flights74.5%
- 8pm–5am301 flights68.3%
Scale runs 60% to 90%.
Book the early departure. Flights leaving between 5am–8am arrive on time 86.1% of the time, against 68.3% for the overnight window. That is 18 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 588 flights scheduled in it.
Explore
Filter EWR to PHX by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On EWR to PHX, the best departure window is 5am–8am at 86.1% on time and the worst is 8pm–5am at 68.3%, a wide gap of 17.8 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am86.1%
- 8–11am77.7%
- 11am–2pm85.7%
- 2–5pm73.7%
- 5–8pm74.5%
- 8pm–5am68.3%
best all US flightsScale 60% to 95%.
Across the year
When delays peak on this route
This route's year swings by 20 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.
April is the best month on the calendar at 88.3% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. December was the busiest month here, with 235 flights.
Across the week, Wednesday is the strongest day at 83.6% on time and Sunday the weakest at 72.2%, a spread of 11 points.
Delay causes
Why this route gets delayed
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 41,000 reported delay minutes.
- 39%Late-arriving aircraft
- 28%Carrier
- 23%National Airspace System
- 10%Extreme weather
- 0%Security
39% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 41,000 reported delay minutes here, that single category outweighs weather by 4 to one. The split is drawn from 41,110 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 86.1% on time here.
Cancellations sit at 2.37% against a national 1.89%, which is ordinary. Diversions add another 0.32%.
Connections and stage length
What a delay here actually costs
7.9% 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 a little over an hour, 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 2,487 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.
The sample behind these figures is 2,485 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.
Work out the risk of missing a connection in PHX after this flight
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 88.3% on time and October 68.6%, a swing of 20 points. If the dates move at all, move them out of October before you think about anything else. 2,418 completed flights over 12 months sit behind that.
Common questions
EWR to PHX questions
How often is EWR to PHX delayed?
About one flight in five arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 21.1% of the 2,485 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on EWR to PHX?
United Airlines leads at 80.3% on time across 1,483 flights. American Airlines is at the other end on 76.9%, a gap of 3 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 EWR to PHX?
The 5am–8am departure window is the strongest at 86.1% on time. The 8pm–5am window is the weakest at 68.3%, 18 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 October delays on EWR to PHX?
October is the weakest month at 68.6% on time, compared with 88.3% in April. Across the year that is 20 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
- PHX to EWR — the return legseparate record
- Newark Liberty International (EWR) delay statistics
- Phoenix Sky Harbor International (PHX) delay statistics
- United Airlines on EWR to PHX80.3%
- American Airlines on EWR to PHX76.9%
- EWR to MCO, a related route77.9%
- DEN to PHX, a related route75.6%
- EWR to ATL, a related route76.9%
- United Airlines on-time record80.3%
- American Airlines on-time record76.9%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Direction matters. EWR to PHX and PHX to EWR are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.