Flight profile · Frontier Airlines
F91734
Denver (DEN) to Orlando (MCO) · scheduled 12:49 AM – 6:00 AM
How F91734 performs
755 operations, November 2023 – July 2026.
F91734 arrived on time 72.6% of the time, against 76.2% for all DEN → MCO flights, so this departure is 3.6 percentage points worse than the route as a whole. Against Frontier Airlines’ own flights on this route it is 2.1 points worse.
Source: US DOT Bureau of Transportation Statistics · 755 operations, November 2023 – July 2026 · If F91734 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where F91734 is right now
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| F91734 | 72.6% | 1.85% | -6 min | 10.5% | 755 |
| Frontier Airlines on DEN → MCO | 74.7% | 1.68% | -7 min | 9.5% | 2,734 |
| All DEN → MCO flights | 76.2% | 1.17% | -5 min | 8.2% | 14,417 |
Source: FlyerIntel analysis of US DOT BTS data · November 2023 – July 2026
Why F91734 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 F91734 on DEN → MCO. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering November 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies F91734 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, F91734 pushed back an average of 72 minutes late; when it came in on time or early, an average of 17 minutes late.
Each departure is matched to the flight the same aircraft flew into DEN just before it, using the tail number in the DOT file, 680 of 742 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
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 |
|---|---|---|---|
| F91734 | 24% | 69% | 28% |
| Network, same turn | 17% | 68% | 9% |
The schedule leaves a normal turn: enough time to clean and board if the aircraft is on time, little to spare if it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often F91734’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often F91734 left 15 or more minutes late is about the same as the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering November 2023 – July 2026
From pushback to gate
When it leaves DEN late, does that still matter by the time it reaches MCO?
F91734 pushes back an average of 29.1 minutes late and reaches the gate at MCO an average of 16.1 minutes late. The 12.9 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. It spends 16.9 minutes on the taxiways at DEN, 1.3 minutes longer than a typical DEN departure in the same hour.
On arrival at MCO, F91734 spends 12.5 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 1.7 minutes longer than a typical MCO arrival (10.9 min).
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached MCO. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 4,169 departures from DEN scheduled in the clock hour F91734 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at MCO (498,229 flights), not just F91734’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · November 2023 – July 2026
The hour it leaves DEN
Part of any flight’s record belongs to the clock rather than to the flight. F91734 has one departure time, so this is what that time is worth.
On-time arrival rate. 4,169 departures from DEN are scheduled in the 12 AM–1 AM hour over the period, against 963,099 across the whole day.
F91734 is scheduled out of DEN at 12:49 AM, in the 12 AM–1 AM bank. Departures from DEN in that hour arrive on time 76.9% of the time against 76.0% across the airport’s whole day, so the hour F91734 leaves in is an ordinary one for DEN and explains nothing about its record either way.
The two airport figures cover every departure from DEN to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · November 2023 – July 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.
61 min late
against a median of 6 min early
F91734 has an average that understates its risk: a typical arrival is 6 min early, but the worst tenth are 67 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 755 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering November 2023 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| UA425 | United Airlines | 86.3% | 14 min early | 830 |
| F93312 | Frontier Airlines | 78.2% | 8 min early | 900 |
| UA259 | United Airlines | 73.4% | 3 min early | 1,106 |
| F91734 this flight | Frontier Airlines | 72.6% | 6 min early | 755 |
| UA501 | United Airlines | 70.8% | 4 min early | 700 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. F91734 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 755 records of F91734 operating DEN → MCO, 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 excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
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
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