Flight number record

F9 1823

Frontier Airlines · San Juan to Orlando

Route: SJU → MCO
Departs: 03:40
Flights: 330
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s F9 1823, check with Frontier Airlines.

F9 1823 lands a B, about a point better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 330 flights, with a median arrival 7 minutes early.

On time

78.5%

Arrivals under 15 minutes late, of 325 completed flights

Avg delay

87 min

Across delayed arrivals only, not all flights

Cancelled

1.52%

National rate is 1.81%

1 hour+ late

8.9%

National rate is 8.1%

These figures cover 330 flights between July 2025 and June 2026. Beyond the headline rate, 8.9% 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.

Schedule

When F9 1823 flies

F9 1823 flies SJU to MCO without a single fixed slot. Its most common scheduled departure was 03:40, used on 49 of 330 flights, with 03:55 (45 flights) and 03:59 (34 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 03:4049 flights14.8%
Departs 03:5545 flights13.6%
Departs 03:5934 flights10.3%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 03:40 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and F9 1823 runs 8 points better at 78.5%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

F9 1823 next to SJU to MCO

Every carrier on SJU to MCO combined arrived on time 78.9% of the time across 6,048 flights, so F9 1823 is about level with it. Frontier flew 1,240 flights on the same city pair under all its flight numbers, including this one, and those ran 78.9% on time. Across its whole network Frontier Airlines managed 73.2%, which this flight beats by 5 points.

F9 1823 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
F9 1823thin sample	330	78.5%	87 min	1.52%	B
All Frontier Airlines on SJU–MCO	1,240	78.9%	138 min	1.37%	B
All carriers on SJU–MCO	6,048	78.9%	79 min	1.01%	B
Frontier Airlines, whole network	205,332	73.2%	84 min	1.85%	C

Across the year

F9 1823 quarter by quarter

F9 1823 did not run the same all year. Its best quarter was Apr–Jun 2026 at 88.6% on time and its weakest Jul–Sep 2025 at 65.2%, a swing of 23 points on roughly 83 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.

Jul–Sep 202589 flights65.2%
Oct–Dec 202587 flights88.4%
Jan–Mar 202665 flights69.4%
Apr–Jun 202689 flights88.6%

Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, F9 1823 ranged from 72.9% on Tuesday to 81.6% on Wednesday. With about 47 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why F9 1823 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 76% of the 6,092 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
76%
Carrier
20%
National Airspace System
4%

76% 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 6,092 reported delay minutes here, that single category outweighs weather by 76 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 6,092 delay minutes reported on F9 1823.

Cancellations sit at 1.52% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

8.9% 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 an hour and a half, which a normal layover absorbs.

The 1,188 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.

Every one of the 330 flights under F9 1823 in the data flew SJU to MCO. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 330 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 F9 1823

For a booking, read F9 1823 as 78.5% on time with 1.52% cancelled over 330 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

A flight number here means Frontier Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.

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