Route reliability record
MIA→EWR
Miami to Newark
- Flights
- 3,913
- Period
- September 2025 to August 2026
- Distance
- 1,085 mi
- Carriers
- 3
This route sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 3,913 MIA to EWR flights, of which United Airlines flew 2,240 at 75.5% on time.
Best time to fly MIA to EWR: a 5am–8am departure, ideally on a Wednesday. Flights in that window arrived on time 92.1% of the time and Wednesday flights 76.5%, against 72.2% for the route overall.
The national on-time rate over the same period is 77.3%, so this route runs 5 points behind the country as a whole. Across a thousand flights that is about 51 extra late arrivals.
Key figures
On time
72.2%
Arrivals under 15 minutes late, of 3,780 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
2.94%
National rate is 1.89%
Best carrier
United
75.5% on time across 2,240 flights
These figures cover 3,913 flights between September 2025 and August 2026. Beyond the headline rate, 12.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Which airline is most reliable on MIA to EWR
The choice of carrier is not cosmetic here. United Airlines arrives on time 75.5% of the time; American Airlines manages 68.4%. Sample sizes sit next to every figure, because a two-point gap across 1,428 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines | 2,240 | 75.5% | 88 min | 2.37% | B |
| American Airlines | 1,428 | 68.4% | 72 min | 3.29% | C− |
| Spirit Airlinesthin sample | 245 | 64.2% | 84 min | 6.12% | 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 MIA to EWR
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 Miami to Newark
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. 4 of the top 5 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. FLL → EWRFort Lauderdale to Newark | United Airlines | 76.1% | 78.1% | 2.57% | 5am–8am, Wed | — |
| 2. MIA → EWRMiami to Newark | United Airlines | 73.7% | 75.5% | 2.37% | 5am–8am, Wed | UA 1864 07:07 |
| 3. FLL → HPNFort Lauderdale to White Plains | JetBlue Airways | 72.7% | 74.3% | 2.16% | 5am–8am, Wed | B6 814 07:00 |
| 4. FLL → JFKFort Lauderdale to New York | Delta Air Lines | 71.9% | 74.9% | 4.02% | 5am–8am, Wed | DL 2165 07:25 |
| 5. MIA → LGAMiami to New York | Delta Air Lines | 70.5% | 73.4% | 3.91% | 5am–8am, Sat | DL 2387 07:00 |
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 35 points, against 7 points between the best and worst carrier.
- 5am–8am498 flights92.1%
- 8am–11am627 flights85.3%
- 11am–2pm696 flights77.0%
- 2pm–5pm623 flights65.3%
- 5pm–8pm897 flights57.0%
- 8pm–5am572 flights65.1%
Scale runs 50% to 100%.
The 5pm–8pm window is where this operation falls apart: 57.0% on time, against 92.1% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5pm–8pm window is the busiest, with 897 flights scheduled in it.
Explore
Filter MIA to EWR 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 MIA to EWR, the best departure window is 5am–8am at 92.1% on time and the worst is 5pm–8pm at 57.0%, a wide gap of 35.1 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am92.1%
- 8–11am85.3%
- 11am–2pm77.0%
- 2–5pm65.3%
- 5–8pm57.0%
- 8pm–5am65.1%
best all US flightsScale 50% to 95%.
Across the year
When delays peak on this route
This route's year swings by 21 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 60.8% on time, 21 points below May, the best at 81.4%. 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 397 flights.
Across the week, Wednesday is the strongest day at 76.5% on time and Sunday the weakest at 65.3%, 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 85,000 reported delay minutes.
- 35%Late-arriving aircraft
- 35%National Airspace System
- 24%Carrier
- 5%Extreme weather
- 0%Security
35% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 85,000 reported delay minutes here, that single category outweighs weather by 7 to one. The split is drawn from 85,092 reported delay minutes.
35% 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 30,000 minutes out of 85,000, against a national NAS share of 21%.
Cancellations run at 2.94%, 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
12.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
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 77.5% on time across 3,914 flights, 5 points above 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 3,913 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 EWR after this flight
What to do with this
Booking this route
Put together: the delay figures matter less here than the 2.94% 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. 3,780 completed flights over 12 months sit behind that.
Common questions
MIA to EWR questions
How often is MIA to EWR 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 27.8% of the 3,913 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 MIA to EWR?
United Airlines leads at 75.5% on time across 2,240 flights. American Airlines is at the other end on 68.4%, a gap of 7 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 MIA to EWR?
The 5am–8am departure window is the strongest at 92.1% on time. The 5pm–8pm window is the weakest at 57.0%, 35 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 MIA to EWR?
July is the weakest month at 60.8% on time, compared with 81.4% in May. Across the year that is 21 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 MIA — the return legseparate record
- Miami International (MIA) delay statistics
- Newark Liberty International (EWR) delay statistics
- United Airlines on MIA to EWR75.5%
- American Airlines on MIA to EWR68.4%
- Spirit Airlines on MIA to EWR64.2%
- MIA to ATL, a related route74.2%
- MCO to EWR, a related route75.0%
- MIA to LGA, a related route67.4%
- United Airlines on-time record75.5%
- American Airlines on-time record68.4%
- Spirit Airlines on-time record64.2%
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Direction matters. MIA to EWR and EWR to MIA 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.