Carrier route record

NKMIA→EWR

Spirit Airlines · Miami to Newark

Flights: 245
Period: September 2025 to August 2026
Share of route: 6%
Carriers: 3

Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Spirit Airlines.

Spirit on MIA to EWR draws a D−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 245 flights. The strongest carrier on the route with a full sample, United Airlines, flew 2,240 at 75.5% on time.

The national on-time rate over the same period is 77.3%, so Spirit on MIA to EWR runs 13 points behind the country as a whole. Across a thousand flights that is about 131 extra late arrivals.

On time

64.2%

Arrivals under 15 minutes late, of 229 completed flights

Avg delay

84 min

Across delayed arrivals only, not all flights

Cancelled

6.12%

National rate is 1.89%

Whole route

72.2%

Every carrier on MIA to EWR, 3,913 flights

These figures cover 245 flights between September 2025 and August 2026. Beyond the headline rate, 17.9% 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

Spirit against every carrier on MIA to EWR

Spirit flew 245 of the 3,913 flights on MIA to EWR, about 6% of it. Its 64.2% on time is 8 points worse than the route as a whole, which runs 72.2%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from United at 75.5% to Spirit at 64.2%.

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.

On-time performance by carrier on MIA to EWR
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 Airlines (this page)thin 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.

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.

Departure window

When Spirit runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 22 points, against 7 points between the best and worst carrier.

5am–8am—
8am–11am64 flights76.2%
11am–2pm105 flights56.2%
2pm–5pm22 flights—
5pm–8pm39 flights77.8%
8pm–5am15 flights—

Scale runs 50% to 85%. 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 56.2% on time against 77.8% for 5pm–8pm. 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 11am–2pm window is the busiest, with 105 flights scheduled in it.

Across the year

Spirit on MIA to EWR through the year

Jul–Sep 202530 flights80.0%
Oct–Dec 202588 flights73.5%
Jan–Mar 202697 flights44.2%
Apr–Jun 202630 flights80.0%

Scale runs 35% to 85%.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 64.2% on time across 245 flights.

Spirit on MIA to EWR did not run the same all year. Its best quarter was Jul–Sep 2025 at 80.0% on time and its weakest Jan–Mar 2026 at 44.2%, a swing of 36 points on roughly 61 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Across the week, Tuesday is the strongest day at 71.4% on time and Friday the weakest at 55.9%, a spread of 16 points.

Arrival by arrival

How late Spirit on MIA to EWR runs when it is late

Spirit on MIA to EWR often beats the schedule: 75 of 229 completed flights, 33%, arrived 15 minutes or more early. The 82 late arrivals split 23 under half an hour, 18 between 30 and 60 minutes, and 41 an hour or more.

15+ min early75 flights32.8%
Within 15 min72 flights31.4%
15–29 min late23 flights10.0%
30–59 min late18 flights7.9%
1–2 hours late23 flights10.0%
2+ hours late18 flights7.9%

Scale runs 0% to 100%.

Share of 229 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 80 departures that left 15 minutes late or more, only 8 made it up before arrival. 10 flights left on time and still arrived late.

The worst days

Worst days for Spirit on MIA to EWR

The latest arrival of the period was on 15 February 2026, 5 hours 56 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as national airspace system delay.

The latest arrivals of Spirit on MIA to EWR in the period
Date	Arrived late by	Largest filed cause
15 February 2026	5 hours 56 minutes	Late-arriving aircraft
11 February 2026	5 hours 50 minutes	Carrier
29 December 2025	4 hours 44 minutes	National Airspace System
12 March 2026	4 hours 34 minutes	National Airspace System
26 April 2026	4 hours 17 minutes	National Airspace System

Delay causes

Why Spirit runs late on this route

National Airspace System accounts for 46% of the 6,895 delay minutes carriers reported here, and the remaining four split what is left.

National Airspace System
46%
Late-arriving aircraft
29%
Carrier
23%
Extreme weather
2%

46% 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 3,166 minutes out of 6,895, against a national NAS share of 21%. The split is drawn from 6,895 reported delay minutes.

Cancellations run at 6.12%, against 1.89% nationally. That is roughly one flight in fifteen 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 costs

17.9% 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 59.2% on time across 247 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.

One caution: this is a thin sample. 245 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking Spirit on MIA to EWR

Put together: the delay figures matter less here than the 6.12% cancellation rate. A late arrival costs you an hour and a half; a cancelled flight costs you the day. Book the 5pm–8pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 229 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures