Flight number record
F9 2520
Frontier Airlines · Denver to Orlando
- Route
- DEN → MCO
- Departs
- 23:59
- Flights
- 261
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 2520, check with Frontier Airlines.
F9 2520 draws a C. About one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 261 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so F9 2520 runs 12 points behind the country as a whole. Across a thousand flights that is about 115 extra late arrivals.
Key figures
On time
65.8%
Arrivals under 15 minutes late, of 257 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
1.53%
National rate is 1.89%
1 hour+ late
14.0%
National rate is 8.3%
These figures cover 261 flights between September 2025 and August 2026. Beyond the headline rate, 14.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When F9 2520 flies
F9 2520 flies DEN to MCO without a single fixed slot. Its most common scheduled departure was 23:59, used on 151 of 261 flights, with 23:52 (44 flights) and 23:56 (34 flights) next.
- Departs 23:59151 flights57.9%
- Departs 23:5244 flights16.9%
- Departs 23:5634 flights13.0%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 23:59 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and F9 2520 runs 4 points worse at 65.8%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
F9 2520 next to DEN to MCO
Every carrier on DEN to MCO combined arrived on time 77.8% of the time across 4,528 flights, so F9 2520 is 12 points behind it. Frontier flew 899 flights on the same city pair under all its flight numbers, including this one, and those ran 74.6% on time. Across its whole network Frontier Airlines managed 72.7%, which this flight trails by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 2520thin sample | 261 | 65.8% | 73 min | 1.53% | C |
| All Frontier Airlines on DEN–MCO | 899 | 74.6% | 68 min | 0.89% | C+ |
| All carriers on DEN–MCO | 4,528 | 77.8% | 62 min | 0.68% | B+ |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 2520 quarter by quarter
F9 2520 did not run the same all year. Its best quarter was Jan–Mar 2026 at 83.3% on time and its weakest Jul–Sep 2026 at 47.5%, a swing of 36 points on roughly 65 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.
- Oct–Dec 202542 flights73.2%
- Jan–Mar 202668 flights83.3%
- Apr–Jun 202689 flights61.8%
- Jul–Sep 202662 flights47.5%
Scale runs 40% to 90%.
By weekday, F9 2520 did best on Saturday at 74.4% on time and worst on Monday at 52.8%. Each day rests on about 37 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 2520 runs when it is late
F9 2520 often beats the schedule: 70 of 257 completed flights, 27%, arrived 15 minutes or more early. The 88 late arrivals split 21 under half an hour, 31 between 30 and 60 minutes, and 36 an hour or more.
- 15+ min early70 flights27.2%
- Within 15 min99 flights38.5%
- 15–29 min late21 flights8.2%
- 30–59 min late31 flights12.1%
- 1–2 hours late28 flights10.9%
- 2+ hours late8 flights3.1%
Scale runs 0% to 100%.
Share of 257 completed flights by arrival against schedule.
18 of 98 late departures made up the time and arrived on time, 18% of them. 8 flights left on time and still arrived late.
The worst days
Worst days for F9 2520
The latest arrival of the period was on 17 August 2026, 8 hours 3 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 August 2026 | 8 hours 3 minutes | Late-arriving aircraft |
| 29 May 2026 | 6 hours 21 minutes | Carrier |
| 22 August 2026 | 6 hours 13 minutes | Carrier |
| 1 April 2026 | 6 hours 11 minutes | Carrier |
| 17 April 2026 | 5 hours 56 minutes | Carrier |
Delay causes
Why F9 2520 runs late
Carrier accounts for 63% of the 6,427 delay minutes carriers reported here, and the remaining four split what is left.
- 63%Carrier
- 27%Late-arriving aircraft
- 8%National Airspace System
- 2%Extreme weather
The largest share of delay minutes, 63%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 4,043 of the 6,427 delay minutes reported here. The split is drawn from 6,427 delay minutes reported on F9 2520.
Cancellations sit at 1.53% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
14.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 1,547 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 261 flights under F9 2520 in the data flew DEN 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. 261 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 2520
For a booking, F9 2520 is a flight to put a long connection behind. 14.0% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- DEN to MCO, every carrier and departure
- MCO to DEN, the return direction
- United Airlines 259 on the same route75.6%
- United Airlines 2354 on the same route84.3%
- United Airlines 501 on the same route73.7%
- Frontier Airlines 3312 on the same route73.8%
- United Airlines 2292 on the same route88.2%
- Denver International (DEN) delay statistics
- Orlando International (MCO) delay statistics
- Frontier Airlines on-time record
- Every Frontier Airlines flight number with a record
- The most and least reliable flight numbers in the US
- How often a connection fails at the major US hubs
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.