Flight profile · Frontier Airlines
F91450
Denver (DEN) to Atlanta (ATL) · scheduled 11:59 PM – 5:02 AM
How F91450 performs
604 operations, November 2023 – August 2026.
Between its first and last recorded date on DEN → ATL, F91450 averaged about 4 operations a week (604 in 1,020 days, cancelled ones included).
F91450 arrived on time 67.8% of the time, against 78.0% for all DEN → ATL flights, so this departure is 10.2 percentage points worse than the route as a whole. Against Frontier Airlines’ own flights on this route it is 1.6 points worse.
Source: US DOT Bureau of Transportation Statistics · 604 operations, November 2023 – August 2026 · If F91450 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where F91450 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| F91450 | 67.8% | 1.49% | 4 min | 11.6% | 604 |
| Frontier Airlines on DEN → ATL | 69.4% | 1.08% | -1 min | 9.5% | 2,230 |
| All DEN → ATL flights | 78.0% | 0.82% | -5 min | 6.8% | 18,620 |
F91450 cancelled 9 of 604 operations (1.49%), above the 0.82% for DEN → ATL.
11.6% of F91450’s arrivals were an hour or more late, against 6.8% across DEN → ATL, so the long delays are more common on this number than on the route.
Source: FlyerIntel analysis of US DOT BTS data · November 2023 – August 2026
Why F91450 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for F91450 on DEN → ATL. Only delays of 15 minutes or more are attributed. What the five causes mean
Source: US DOT Bureau of Transportation Statistics · Data covering November 2023 – August 2026
Does a late aircraft delay this flight?
How often the plane that flies F91450 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, F91450 pushed back an average of 37 minutes late; when it came in on time or early, an average of 9 minutes late.
Matched by tail number to the aircraft’s previous flight into DEN: 523 of 595 departures. Unknown, cancelled or diverted inbounds and gaps over 12 hours are left out.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| F91450 | 28% | 56% | 22% |
| Network, same turn | 23% | 40% | 9% |
A long gap on the ground gives a late aircraft room to catch up, though this flight has passed a late inbound on more often than the network does.
The network row is every flight with a scheduled turn of 90 minutes to 3 hours. How often F91450’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often F91450 left 15 or more minutes late is higher than the network’s.
Which Flight Numbers Pay for a Late Aircraft ranks the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering November 2023 – August 2026
From pushback to gate
When it leaves DEN late, does that still matter by the time it reaches ATL?
F91450 pushes back an average of 17.7 minutes late and reaches the gate at ATL an average of 14.5 minutes late. The 3.2 minutes between those two figures are slack the published schedule already carries, so a late pushback is partly, not fully, made up before the gate. It spends 18.5 minutes on the taxiways at DEN, 1.8 minutes longer than a typical DEN departure in the same hour.
On arrival at ATL, F91450 spends 20.2 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 10.6 minutes longer than a typical ATL arrival (9.6 min).
Taxi-out is gate to wheels up and sits inside the scheduled block; the hourly comparison is 13,810 DEN departures. Taxi-in is landing to gate, set against 1,039,387 arrivals at ATL. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · November 2023 – August 2026
The hour it leaves DEN
F91450 has one departure time, 11:59 PM, so this is what that hour at DEN is worth.
On-time arrival rate. 13,810 departures from DEN are scheduled in the 11 PM–12 AM hour over the period, against 991,655 across the whole day.
F91450 is scheduled out of DEN at 11:59 PM, in the 11 PM–12 AM bank. Departures from DEN in that hour arrive on time 77.9% of the time against 75.8% across the airport’s whole day, so the hour F91450 leaves in is an ordinary one for DEN and explains nothing about its record either way.
Both airport figures cover every destination from DEN, so they describe the slot, not this journey; the route comparison is above. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · November 2023 – August 2026 · Hours below 120 departures are not scored.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
69 min late
against a median of 4 min late
F91450 has an average that understates its risk: a typical arrival is 4 min late, but the worst tenth are 65 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 604 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering November 2023 – August 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL341 | Delta Air Lines | 90.9% | 10 min early | 816 |
| DL431 | Delta Air Lines | 88.9% | 9 min early | 816 |
| DL995 | Delta Air Lines | 83.5% | 9 min early | 901 |
| UA2415 | United Airlines | 82.0% | 4 min early | 806 |
| DL346 | Delta Air Lines | 79.3% | 4 min early | 687 |
| DL840 | Delta Air Lines | 75.2% | 7 min early | 730 |
| F93294 | Frontier Airlines | 71.8% | 3 min early | 844 |
| UA1305 | United Airlines | 70.3% | 2 min early | 1,064 |
| F91450 this flight | Frontier Airlines | 67.8% | 4 min late | 604 |
Among the 9 departures listed, F91450 has the lowest on-time rate, 23.1 points behind the best. Every departure here has at least 600 operations; the other rows are the most punctual on the route, not all of them.
Data and methodology
Calculated by FlyerIntel from 604 records of F91450 operating DEN → ATL, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule; cancelled and diverted flights are reported separately, not in the on-time rate.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
Analysis last recomputed