Carrier route record

F9MCO→BOS

Frontier Airlines · Orlando to Boston

Flights: 124
Period: July 2025 to June 2026
Share of route: 3%
Carriers: 6

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

Frontier on MCO to BOS earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 13 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 124 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 1,257 at 76.0% on time.

Set against the rest of the country, Frontier's MCO to BOS record is 13 points better than the US average of 77.6%. That gap is worth roughly 127 fewer late arrivals for every thousand flights.

On time

90.3%

Arrivals under 15 minutes late, of 124 completed flights

Avg delay

68 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

Whole route

70.5%

Every carrier on MCO to BOS, 4,611 flights

These figures cover 124 flights between July 2025 and June 2026. The median arrival is 15 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.

Carrier by carrier

Frontier against every carrier on MCO to BOS

Frontier flew 124 of the 4,611 flights on MCO to BOS, about 3% of it. Its 90.3% on time is 20 points better than the route as a whole, which runs 70.5%. Ranked by on-time rate it is number two of six carriers on the route, where the range runs from Southwest at 100.0% to American at 66.8%. Two 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 76.0% of the time; JetBlue Airways manages 67.3%. Sample sizes sit next to every figure, because a two-point gap across 2,495 flights means less than a ten-point one.

On-time performance by carrier on MCO to BOS
Airline	Flights	On time	Avg delay	Cancelled	Grade
Southwest Airlinesthin sample	3	100.0%	—	0.00%	A+
Frontier Airlines (this page)thin sample	124	90.3%	68 min	0.00%	A+
Delta Air Lines	1,257	76.0%	74 min	2.23%	B
Spirit Airlines	519	69.3%	62 min	3.85%	C−
JetBlue Airways	2,495	67.3%	78 min	3.13%	C−
American Airlinesthin sample	213	66.8%	71 min	3.29%	C−

Spirit Airlines cancels 3.9% 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 124 flights.

There are not enough flights in each departure window to split Frontier's MCO to BOS record by time of day without the percentages moving on noise. The headline rate of 90.3% is the reliable figure here.

Across the year

Frontier on MCO to BOS through the year

Jul–Sep 202527 flights—
Oct–Dec 202533 flights84.8%
Jan–Mar 202621 flights—
Apr–Jun 202643 flights95.3%

Scale runs 75% to 100%. 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 90.3% on time across 124 flights.

Split by quarter, Frontier on MCO to BOS logged 27 flights in Jul–Sep 2025, 33 flights in Oct–Dec 2025, 21 flights in Jan–Mar 2026 and 43 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 90.3% annual figure is the one to use.

Delay causes

Why Frontier runs late on this route

One category carries most of the weight here. Carrier accounts for 71% of the 814 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.

Carrier
71%
National Airspace System
16%
Late-arriving aircraft
12%
Extreme weather
1%

The largest share of delay minutes, 71%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 576 of the 814 delay minutes reported here. The split is drawn from 814 reported delay minutes.

Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.

Connections and stage length

What a delay here costs

Badly late arrivals are rare here: only 4.8% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

The 1,121 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 69.9% on time across 124 flights, 20 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 20 points of difference.

One caution: this is a thin sample. 124 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 MCO to BOS

Put together: treat all of this as provisional. 124 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 90.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 124 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