Route reliability record
EWR→JAX
Newark to Jacksonville
- Flights
- 1,353
- Period
- September 2025 to August 2026
- Distance
- 820 mi
- Carriers
- 2
This route lands a B, 4 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 an hour and a half on average. That rests on 1,353 EWR to JAX flights, with a median arrival 11 minutes early.
Best time to fly EWR to JAX: a 5am–8am departure, ideally on a Monday. Flights in that window arrived on time 92.2% of the time and Monday flights 83.9%, against 81.1% 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
81.1%
Arrivals under 15 minutes late, of 1,314 completed flights
Avg delay
83 min
Across delayed arrivals only, not all flights
Cancelled
2.66%
National rate is 1.89%
Best carrier
United
80.4% on time across 1,191 flights
These figures cover 1,353 flights between September 2025 and August 2026. The median arrival is 11 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 JAX
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 |
|---|---|---|---|---|---|
| Republic Airwaysthin sample | 162 | 86.6% | 54 min | 7.41% | A− |
| United Airlines | 1,191 | 80.4% | 86 min | 2.02% | B |
Flight by flight
Flights on EWR to JAX
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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Best ways to make this trip
The most reliable ways to fly Newark to Jacksonville
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. 1 of the top 2 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. EWR → JAXNewark to Jacksonville | United Airlines | 78.8% | 80.4% | 2.02% | 5am–8am, Fri | UA 1207 06:00 |
| 2. JFK → JAXNew York to Jacksonville | JetBlue Airways | 69.8% | 73.4% | 4.94% | 8am–11am, Tue | B6 677 13:59 |
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 half a point between the best and worst carrier.
- 5am–8am316 flights92.2%
- 8am–11am27 flights—
- 11am–2pm362 flights79.8%
- 2pm–5pm306 flights78.4%
- 5pm–8pm76 flights74.7%
- 8pm–5am266 flights74.5%
Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 92.2% of the time, against 74.5% 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 11am–2pm window is the busiest, with 362 flights scheduled in it.
Explore
Filter EWR to JAX 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 JAX, the best departure window is 5am–8am at 92.2% on time and the worst is 8pm–5am at 74.5%, a wide gap of 17.7 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am92.2%
- 8–11am—
- 11am–2pm79.8%
- 2–5pm78.4%
- 5–8pm74.7%
- 8pm–5am74.5%
best all US flightsScale 60% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 19 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 69.6% on time, 19 points below September, the best at 88.5%. 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. March was the busiest month here, with 124 flights.
Across the week, Monday is the strongest day at 83.9% on time and Sunday the weakest at 73.3%, a spread of 11 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 43% of the 21,000 delay minutes carriers reported here, and the remaining four split what is left.
- 43%Late-arriving aircraft
- 25%Carrier
- 19%National Airspace System
- 13%Extreme weather
Extreme weather accounts for 13% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.2 times the usual weather exposure. The split is drawn from 20,573 reported delay minutes.
43% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 21,000 reported delay minutes here, that single category outweighs weather by 3 to one.
Cancellations run at 2.66%, against 1.89% nationally. That is about one flight in 40 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 stage length
What a delay here actually costs
7.6% 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 an hour and a half, which a normal layover absorbs.
The 820 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.
The return leg runs 78.7% on time across 1,353 flights, within 2 points 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 1,353 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 JAX 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. September runs 88.5% on time and August 69.6%, a swing of 19 points. If the dates move at all, move them out of August before you think about anything else. 1,314 completed flights over 12 months sit behind that.
Common questions
EWR to JAX questions
How often is EWR to JAX 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 18.9% of the 1,353 flights in this analysis, against 22.7% nationally. Delayed flights are late by an hour and a half on average.
How reliable is EWR to JAX compared with the rest of the country?
81.1% of flights arrive on time here against a national 77.3%, a difference of 4 points in its favour. That is worth a B on this site's grading scale.
What time of day has the fewest delays on EWR to JAX?
The 5am–8am departure window is the strongest at 92.2% on time. The 8pm–5am window is the weakest at 74.5%, 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 August delays on EWR to JAX?
August is the weakest month at 69.6% on time, compared with 88.5% in September. Across the year that is 19 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
- JAX to EWR — the return legseparate record
- Newark Liberty International (EWR) delay statistics
- Jacksonville International (JAX) delay statistics
- Republic Airways on EWR to JAX86.6%
- United Airlines on EWR to JAX80.4%
- EWR to MCO, a related route77.9%
- ATL to JAX, a related route75.1%
- EWR to ATL, a related route76.9%
- Republic Airways on-time record86.6%
- United Airlines on-time record80.4%
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Direction matters. EWR to JAX and JAX 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.