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DelayAtlas

Carrier route record

F9MCO→BOS

Frontier Airlines · Orlando to Boston

Flights
151
Period
September 2025 to August 2026
Share of route
3%
Carriers
6
A+GRADE

Historical statistics for September 2025 to August 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 77.3%. When something does go wrong the average delay runs about an hour. That rests on 151 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 1,257 at 77.0% on time.

Set against the rest of the country, Frontier's MCO to BOS record is 13 points better than the US average of 77.3%. That gap is worth roughly 134 fewer late arrivals for every thousand flights.

Key figures

On time

90.7%

Arrivals under 15 minutes late, of 151 completed flights

Avg delay

63 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.89%

Whole route

71.1%

Every carrier on MCO to BOS, 4,614 flights

These figures cover 151 flights between September 2025 and August 2026. The median arrival is 13 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.

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Carrier by carrier

Frontier against every carrier on MCO to BOS

Frontier flew 151 of the 4,614 flights on MCO to BOS, about 3% of it. Its 90.7% on time is 20 points better than the route as a whole, which runs 71.1%. 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 77.0% of the time; JetBlue Airways manages 67.4%. Sample sizes sit next to every figure, because a two-point gap across 2,527 flights means less than a ten-point one.

On-time performance by carrier on MCO to BOS
AirlineFlightsOn timeAvg delayCancelledGrade
Southwest Airlinesthin sample3100.0%—0.00%A+
Frontier Airlines (this page)thin sample15190.7%63 min0.00%A+
Delta Air Lines1,25777.0%72 min2.23%B
Spirit Airlines39270.1%54 min4.59%C−
JetBlue Airways2,52767.4%80 min3.72%C−
American Airlinesthin sample28466.8%80 min3.17%C−

Spirit Airlines cancels 4.6% 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 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 151 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 90.7% is the reliable figure here.

Across the year

Frontier on MCO to BOS through the year

  • Oct–Dec 202533 flights84.8%
  • Jan–Mar 202621 flights—
  • Apr–Jun 202643 flights95.3%
  • Jul–Sep 202654 flights92.6%

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 90.7% on time across 151 flights.

Frontier on MCO to BOS did not run the same all year. Its best quarter was Apr–Jun 2026 at 95.3% on time and its weakest Oct–Dec 2025 at 84.8%, a swing of 11 points on roughly 50 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.

Arrival by arrival

How late Frontier on MCO to BOS runs when it is late

Frontier on MCO to BOS often beats the schedule: 70 of 151 completed flights, 46%, arrived 15 minutes or more early. The 14 late arrivals split 4 under half an hour, 3 between 30 and 60 minutes, and 7 an hour or more.

  • 15+ min early70 flights46.4%
  • Within 15 min67 flights44.4%
  • 15–29 min late4 flights2.6%
  • 30–59 min late3 flights2.0%
  • 1–2 hours late5 flights3.3%
  • 2+ hours late2 flights1.3%

Scale runs 0% to 100%.

Share of 151 completed flights by arrival against schedule.

A late pushback is often recovered here: of 20 departures that left 15 minutes late or more, 7 still arrived on time. Only 1 left on time and still arrived late.

The worst days

Worst days for Frontier on MCO to BOS

The latest arrival of the period was on 17 November 2025, 3 hours 11 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.

The latest arrivals of Frontier on MCO to BOS in the period
DateArrived late byLargest filed cause
17 November 20253 hours 11 minutesCarrier
21 February 20262 hours 11 minutesCarrier
15 November 20251 hour 39 minutesCarrier
28 December 20251 hour 26 minutesLate-arriving aircraft
17 August 20261 hour 3 minutesCarrier

Delay causes

Why Frontier runs late on this route

Carrier accounts for 77% of the 887 delay minutes carriers reported here, and the remaining four split what is left.

  • Carrier
    77%
  • National Airspace System
    11%
  • Late-arriving aircraft
    11%
  • Extreme weather
    1%

The largest share of delay minutes, 77%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 682 of the 887 delay minutes reported here. The split is drawn from 887 reported delay minutes.

Cancellations are rare at 0.00%, below the national 1.89% 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 4.6% land an hour or more behind schedule, against 8.3% 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.

The return leg is a different operation and performs like one: it runs 74.0% on time across 151 flights, 17 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 17 points of difference.

One caution: this is a thin sample. 151 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. 151 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 90.7% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 151 completed flights over 12 months sit behind that.

Related

Where to go next

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.