Carrier route record

F9MIA→LGA

Frontier Airlines · Miami to New York

Flights: 119
Period: July 2025 to June 2026
Share of route: 2%
Carriers: 5

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Frontier Airlines.

Frontier on MIA to LGA draws a D−. Roughly 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 119 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 1,916 at 72.2% on time.

Delta Air Lines is the most reliable of the three carriers covered here at 72.2% on time across 1,916 flights.

On time

60.0%

Arrivals under 15 minutes late, of 105 completed flights

Avg delay

90 min

Across delayed arrivals only, not all flights

Cancelled

11.76%

National rate is 1.81%

Whole route

68.0%

Every carrier on MIA to LGA, 6,010 flights

These figures cover 119 flights between July 2025 and June 2026. Beyond the headline rate, 16.2% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Carrier by carrier

Frontier against every carrier on MIA to LGA

Frontier flew 119 of the 6,010 flights on MIA to LGA, about 2% of it. Its 60.0% on time is 8 points worse than the route as a whole, which runs 68.0%. Ranked by on-time rate it is number four of five carriers on the route, where the range runs from Republic at 75.0% to Spirit at 59.0%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 72.2% of the time; Spirit Airlines manages 59.0%. Sample sizes sit next to every figure, because a two-point gap across 422 flights means less than a ten-point one.

On-time performance by carrier on MIA to LGA
Airline	Flights	On time	Avg delay	Cancelled	Grade
Republic Airwaysthin sample	4	75.0%	31 min	0.00%	B+
Delta Air Lines	1,916	72.2%	65 min	3.97%	C−
American Airlines	3,549	67.0%	82 min	3.47%	C−
Frontier Airlines (this page)thin sample	119	60.0%	90 min	11.76%	D−
Spirit Airlines	422	59.0%	73 min	7.82%	D−

Spirit Airlines cancels 7.8% 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.

Departure window

When Frontier runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 119 flights.

There are not enough flights in each departure window to split Frontier's MIA to LGA record by time of day without the percentages moving on noise. The headline rate of 60.0% is the reliable figure here.

Across the year

Frontier on MIA to LGA through the year

Jul–Sep 202524 flights—
Oct–Dec 202522 flights—
Jan–Mar 202660 flights50.0%
Apr–Jun 202613 flights—

Scale runs 40% to 55%. Rows with fewer than 30 flights show a dash.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 60.0% on time across 119 flights.

Split by quarter, Frontier on MIA to LGA logged 24 flights in Jul–Sep 2025, 22 flights in Oct–Dec 2025, 60 flights in Jan–Mar 2026 and 13 flights in Apr–Jun 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 60.0% annual figure is the one to use.

Delay causes

Why Frontier runs late on this route

One category carries most of the weight here. National Airspace System accounts for 50% of the 3,789 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

National Airspace System
50%
Extreme weather
18%
Late-arriving aircraft
16%
Carrier
16%

Extreme weather accounts for 18% 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 2.9 times the usual weather exposure. The split is drawn from 3,789 reported delay minutes.

50% 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 1,910 minutes out of 3,789, against a national NAS share of 21%.

Cancellations run at 11.76%, against 1.81% nationally. That is about one flight in nine 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 16.2% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

The 1,096 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The return leg is a different operation and performs like one: it runs 67.3% on time across 119 flights, 7 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 7 points of difference.

One caution: this is a thin sample. 119 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 Frontier on MIA to LGA

Put together: the delay figures matter less here than the 11.76% 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. 105 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures