Route reliability record
EWR→MIA
Newark to Miami
- Flights
- 3,914
- Period
- September 2025 to August 2026
- Distance
- 1,085 mi
- Carriers
- 3
This route 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 a little over an hour on average. That rests on 3,914 EWR to MIA flights, of which American Airlines flew 1,429 at 81.3% on time.
Best time to fly EWR to MIA: a 5am–8am departure, ideally on a Tuesday. Flights in that window arrived on time 90.1% of the time and Tuesday flights 84.6%, against 77.5% 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
77.5%
Arrivals under 15 minutes late, of 3,785 completed flights
Avg delay
82 min
Across delayed arrivals only, not all flights
Cancelled
2.96%
National rate is 1.89%
Best carrier
American
81.3% on time across 1,429 flights
These figures cover 3,914 flights between September 2025 and August 2026. Beyond the headline rate, 8.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
Which airline is most reliable on EWR to MIA
The two carriers here are closely matched: 4 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 |
|---|---|---|---|---|---|
| American Airlines | 1,429 | 81.3% | 102 min | 3.29% | B− |
| United Airlines | 2,238 | 77.1% | 72 min | 2.50% | B |
| Spirit Airlinesthin sample | 247 | 59.2% | 76 min | 5.26% | D− |
American Airlines cancels 3.3% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Flight by flight
Flights on EWR to MIA
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.
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.
Best ways to make this trip
The most reliable ways to fly Newark to Miami
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 → MIANewark to Miami | American Airlines | 78.6% | 81.3% | 3.29% | 5am–8am, Tue | AA 1196 05:40 |
| 2. EWR → FLLNewark to Fort Lauderdale | United Airlines | 76.2% | 78.2% | 2.53% | 5am–8am, Tue | UA 1364 07:00 |
| 3. EWR → MIANewark to Miami | United Airlines | 75.2% | 77.1% | 2.50% | 5am–8am, Tue | UA 2295 11:31 |
| 4. JFK → MIANew York to Miami | American Airlines | 74.6% | 76.9% | 2.97% | 5am–8am, Wed | AA 2017 07:30 |
| 5. JFK → MIANew York to Miami | Delta Air Lines | 73.2% | 75.8% | 3.45% | 5am–8am, Wed | DL 1528 07:05 |
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 27 points, against 4 points between the best and worst carrier.
- 5am–8am991 flights90.1%
- 8am–11am535 flights80.8%
- 11am–2pm886 flights78.1%
- 2pm–5pm480 flights63.1%
- 5pm–8pm747 flights71.1%
- 8pm–5am275 flights66.7%
Scale runs 55% to 95%.
Book the early departure. Flights leaving between 5am–8am arrive on time 90.1% of the time, against 63.1% for the afternoon 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 5am–8am window is the busiest, with 991 flights scheduled in it.
Explore
Filter EWR to MIA 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 MIA, the best departure window is 5am–8am at 90.1% on time and the worst is 2pm–5pm at 63.1%, a wide gap of 27.0 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am90.1%
- 8–11am80.8%
- 11am–2pm78.1%
- 2–5pm63.1%
- 5–8pm71.1%
- 8pm–5am66.7%
best all US flightsScale 55% to 95%.
Across the year
When delays peak on this route
This route's year swings by 18 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.
July is the worst month at 69.2% on time, 18 points below May, the best at 87.2%. 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 396 flights.
Across the week, Tuesday is the strongest day at 84.6% on time and Sunday the weakest at 69.4%, a spread of 15 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 69,000 reported delay minutes.
- 37%Late-arriving aircraft
- 28%National Airspace System
- 25%Carrier
- 10%Extreme weather
- 0%Security
37% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 69,000 reported delay minutes here, that single category outweighs weather by 4 to one. The split is drawn from 69,274 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 90.1% on time here.
Cancellations run at 2.96%, against 1.89% nationally. That is roughly one flight in 30 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
8.7% 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.
The 1,085 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 is a different operation and performs like one: it runs 72.2% on time across 3,913 flights, 5 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 5 points of difference.
The sample behind these figures is 3,914 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 MIA after this flight
What to do with this
Booking this route
Put together: the delay figures matter less here than the 2.96% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 3,785 completed flights over 12 months sit behind that.
Common questions
EWR to MIA questions
How often is EWR to MIA delayed?
Roughly one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 22.5% of the 3,914 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 MIA?
American Airlines leads at 81.3% on time across 1,429 flights. United Airlines is at the other end on 77.1%, a gap of 4 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 MIA?
The 5am–8am departure window is the strongest at 90.1% on time. The 2pm–5pm window is the weakest at 63.1%, 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 July delays on EWR to MIA?
July is the weakest month at 69.2% on time, compared with 87.2% in May. Across the year that is 18 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
- MIA to EWR — the return legseparate record
- Newark Liberty International (EWR) delay statistics
- Miami International (MIA) delay statistics
- American Airlines on EWR to MIA81.3%
- United Airlines on EWR to MIA77.1%
- Spirit Airlines on EWR to MIA59.2%
- EWR to MCO, a related route77.9%
- ATL to MIA, a related route71.2%
- EWR to ATL, a related route76.9%
- American Airlines on-time record81.3%
- United Airlines on-time record77.1%
- Spirit Airlines on-time record59.2%
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Direction matters. EWR to MIA and MIA to EWR are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Embed EWR to MIA’s on-time badge on your site
Paste this into a web page. The badge shows the current on-time rate, cancellation rate and grade, and updates every month. Preview it, or build a badge for another route or airport.
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.