Carrier route record

F9IAD→MCO

Frontier Airlines · Washington to Orlando

Flights: 279
Period: July 2025 to June 2026
Share of route: 13%
Carriers: 2

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

Frontier on IAD 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, 5 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 279 flights, with a median arrival 12 minutes early.

The national on-time rate over the same period is 77.6%, so Frontier on IAD to MCO runs 5 points behind the country as a whole. Across a thousand flights that is about 53 extra late arrivals.

On time

72.3%

Arrivals under 15 minutes late, of 271 completed flights

Avg delay

77 min

Across delayed arrivals only, not all flights

Cancelled

2.87%

National rate is 1.81%

Whole route

81.7%

Every carrier on IAD to MCO, 2,176 flights

These figures cover 279 flights between July 2025 and June 2026. Beyond the headline rate, 8.5% 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 IAD to MCO

Frontier flew 279 of the 2,176 flights on IAD to MCO, about 13% of it. Its 72.3% on time is 9 points worse than the route as a whole, which runs 81.7%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from United at 83.0% to Frontier at 72.3%.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on IAD to MCO
Airline	Flights	On time	Avg delay	Cancelled	Grade
United Airlines	1,897	83.0%	70 min	0.58%	B+
Frontier Airlines (this page)thin sample	279	72.3%	77 min	2.87%	C

Departure window

When Frontier runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 28 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am—
8am–11am63 flights83.6%
11am–2pm68 flights69.2%
2pm–5pm7 flights—
5pm–8pm72 flights78.6%
8pm–5am69 flights55.9%

Scale runs 45% to 90%. Rows with fewer than 30 flights show a dash.

The 8pm–5am window is where this operation falls apart: 55.9% on time, against 83.6% for the 8am–11am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5pm–8pm window is the busiest, with 72 flights scheduled in it.

Across the year

Frontier on IAD to MCO through the year

Jul–Sep 202565 flights64.5%
Oct–Dec 202563 flights67.7%
Jan–Mar 202654 flights75.0%
Apr–Jun 202697 flights78.9%

Scale runs 55% to 85%. 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 72.3% on time across 279 flights.

Frontier on IAD to MCO did not run the same all year. Its best quarter was Apr–Jun 2026 at 78.9% on time and its weakest Jul–Sep 2025 at 64.5%, a swing of 14 points on roughly 70 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, Monday is the strongest day at 76.9% on time and Sunday the weakest at 66.0%. 11 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Frontier runs late on this route

One category carries most of the weight here. Late-arriving aircraft accounts for 50% of the 5,779 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.

Late-arriving aircraft
50%
Carrier
33%
National Airspace System
16%
Extreme weather
1%

50% 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 5,779 reported delay minutes here, that single category outweighs weather by 35 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 5,779 reported delay minutes.

The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 83.6% on time here.

Cancellations run at 2.87%, against 1.81% nationally. That is roughly one flight in 30 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

8.5% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

The 758 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 81.6% on time across 280 flights, 9 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 9 points of difference.

One caution: this is a thin sample. 279 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 IAD to MCO

Put together: the delay figures matter less here than the 2.87% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 271 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