Flight number record
F9 4036
Frontier Airlines · Atlanta to Cleveland
- Route
- ATL → CLE
- Departs
- 21:15
- Flights
- 270
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 4036, check with Frontier Airlines.
F9 4036 draws a D−. Roughly 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 270 flights, with a median arrival 6 minutes late.
The national on-time rate over the same period is 77.3%, so F9 4036 runs 17 points behind the country as a whole. Across a thousand flights that is about 173 extra late arrivals.
Key figures
On time
60.0%
Arrivals under 15 minutes late, of 260 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
3.33%
National rate is 1.89%
1 hour+ late
16.9%
National rate is 8.3%
These figures cover 270 flights between September 2025 and August 2026. Beyond the headline rate, 16.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When F9 4036 flies
F9 4036 flies ATL to CLE without a single fixed slot. Its most common scheduled departure was 21:15, used on 65 of 270 flights, with 18:56 (60 flights) next.
- Departs 21:1565 flights24.1%
- Departs 18:5660 flights22.2%
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 21:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and F9 4036 runs 10 points worse at 60.0%. 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 4036 next to ATL to CLE
Every carrier on ATL to CLE combined arrived on time 79.0% of the time across 3,398 flights, so F9 4036 is 19 points behind it. Frontier flew 718 flights on the same city pair under all its flight numbers, including this one, and those ran 68.7% on time. Across its whole network Frontier Airlines managed 72.7%, which this flight trails by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 4036thin sample | 270 | 60.0% | 69 min | 3.33% | D− |
| All Frontier Airlines on ATL–CLE | 718 | 68.7% | 69 min | 2.51% | C |
| All carriers on ATL–CLE | 3,398 | 79.0% | 58 min | 2.00% | B |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 4036 quarter by quarter
Quarter by quarter F9 4036 held fairly steady: 54.5% in Oct–Dec 2025, 61.6% in Jan–Mar 2026, 61.3% in Apr–Jun 2026 and 52.4% in Jul–Sep 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202517 flights—
- Oct–Dec 202567 flights54.5%
- Jan–Mar 202679 flights61.6%
- Apr–Jun 202664 flights61.3%
- Jul–Sep 202643 flights52.4%
Scale runs 45% to 65%. Rows with fewer than 30 flights show a dash.
By weekday, F9 4036 did best on Friday at 68.0% on time and worst on Saturday at 46.2%. Each day rests on about 39 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 4036 runs when it is late
The 104 late arrivals split 25 under half an hour, 35 between 30 and 60 minutes, and 44 an hour or more.
- 15+ min early52 flights20.0%
- Within 15 min104 flights40.0%
- 15–29 min late25 flights9.6%
- 30–59 min late35 flights13.5%
- 1–2 hours late26 flights10.0%
- 2+ hours late18 flights6.9%
Scale runs 0% to 100%.
Share of 260 completed flights by arrival against schedule.
16 of 111 late departures made up the time and arrived on time, 14% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for F9 4036
The latest arrival of the period was on 29 November 2025, 4 hours 2 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 29 November 2025 | 4 hours 2 minutes | Late-arriving aircraft |
| 14 June 2026 | 3 hours 48 minutes | Extreme weather |
| 11 July 2026 | 3 hours 43 minutes | Late-arriving aircraft |
| 27 April 2026 | 3 hours 34 minutes | Late-arriving aircraft |
| 30 November 2025 | 3 hours 32 minutes | Late-arriving aircraft |
Delay causes
Why F9 4036 runs late
Late-arriving aircraft accounts for 65% of the 7,151 delay minutes carriers reported here, and the remaining four split what is left.
- 65%Late-arriving aircraft
- 25%Carrier
- 7%National Airspace System
- 2%Extreme weather
65% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,151 reported delay minutes here, that single category outweighs weather by 30 to one. The split is drawn from 7,151 delay minutes reported on F9 4036.
Cancellations run at 3.33%, against 1.89% nationally. That is about 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 routes
What a delay on this flight costs
16.9% 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.
The 554 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.
Every one of the 270 flights under F9 4036 in the data flew ATL to CLE. 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. 270 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 4036
For a booking, the cancellation rate is the figure to plan around on F9 4036: 3.33% of its 270 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- ATL to CLE, every carrier and departure
- CLE to ATL, the return direction
- Delta Air Lines 1320 on the same route77.7%
- Delta Air Lines 775 on the same route85.7%
- Delta Air Lines 2545 on the same route86.2%
- Frontier Airlines 2410 on the same route73.5%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Cleveland Hopkins International (CLE) 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
- Why the first flight of the morning is statistically safest
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.