Carrier route record

F9BOS→MCO

Frontier Airlines · Boston to Orlando

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 BOS to MCO sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 8 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 124 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 1,257 at 75.4% on time.

Delta Air Lines is the most reliable of the three carriers covered here at 75.4% on time across 1,257 flights.

On time

69.9%

Arrivals under 15 minutes late, of 123 completed flights

Avg delay

66 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

Whole route

70.1%

Every carrier on BOS to MCO, 4,606 flights

These figures cover 124 flights between July 2025 and June 2026. Beyond the headline rate, 9.8% 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 BOS to MCO

Frontier flew 124 of the 4,606 flights on BOS to MCO, about 3% of it. Its 69.9% on time is about level with the route as a whole at 70.1%. Ranked by on-time rate it is number three of six carriers on the route, where the range runs from American at 79.2% to Southwest at 50.0%. 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 75.4% of the time; Spirit Airlines manages 63.5%. Sample sizes sit next to every figure, because a two-point gap across 515 flights means less than a ten-point one.

On-time performance by carrier on BOS to MCO
Airline	Flights	On time	Avg delay	Cancelled	Grade
American Airlinesthin sample	213	79.2%	105 min	2.82%	B
Delta Air Lines	1,257	75.4%	80 min	2.15%	B
Frontier Airlines (this page)thin sample	124	69.9%	66 min	0.00%	C+
JetBlue Airways	2,493	67.9%	73 min	2.89%	C
Spirit Airlines	515	63.5%	80 min	4.08%	D−
Southwest Airlinesthin sample	4	50.0%	19 min	0.00%	F+

Spirit Airlines cancels 4.1% 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.

5am–8am—
8am–11am59 flights74.6%
11am–2pm65 flights65.6%
2pm–5pm—
5pm–8pm—
8pm–5am—

Scale runs 55% to 80%. 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 65.6% on time against 74.6% for 8am–11am. 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 65 flights scheduled in it.

Across the year

Frontier on BOS to MCO through the year

Jul–Sep 202527 flights—
Oct–Dec 202533 flights48.5%
Jan–Mar 202621 flights—
Apr–Jun 202643 flights83.3%

Scale runs 40% to 90%. 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 69.9% on time across 124 flights.

Split by quarter, Frontier on BOS to MCO 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 69.9% 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 45% of the 2,452 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
45%
Late-arriving aircraft
38%
Carrier
17%
Extreme weather
0%

38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 2,452 reported delay minutes here, that single category outweighs weather by 38 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 2,452 reported delay minutes.

45% 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 1,097 minutes out of 2,452, against a national NAS share of 21%.

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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.8% 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 1,121 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 90.3% on time across 124 flights, 20 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 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 BOS to MCO

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 69.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 123 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