Flight profile · Frontier Airlines
F93406
Seattle (SEA) to Denver (DEN) · scheduled 6:25 AM – 10:14 AM
How F93406 performs
654 operations, December 2023 – July 2026.
F93406 arrived on time 75.5% of the time, against 77.9% for all SEA → DEN flights, so this departure is 2.4 percentage points worse than the route as a whole. Against Frontier Airlines’ own flights on this route it is 3.8 points better.
Source: US DOT Bureau of Transportation Statistics · 654 operations, December 2023 – July 2026 · If F93406 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where F93406 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 |
|---|---|---|---|---|---|
| F93406 | 75.5% | 1.38% | -4 min | 7.3% | 654 |
| Frontier Airlines on SEA → DEN | 71.7% | 1.46% | -1 min | 10.3% | 1,435 |
| All SEA → DEN flights | 77.9% | 0.75% | -5 min | 6.6% | 20,291 |
Source: FlyerIntel analysis of US DOT BTS data · December 2023 – July 2026
Why F93406 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
crew, maintenance, boarding and fueling, all within the carrier’s control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for F93406 on SEA → DEN. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering December 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies F93406 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, F93406 pushed back an average of 36 minutes late; when it came in on time or early, an average of 2 minutes late.
Each departure is matched to the flight the same aircraft flew into SEA just before it, using the tail number in the DOT file, 640 of 645 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 |
|---|---|---|---|
| F93406 | 22% | 55% | 12% |
| 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 F93406’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often F93406 left 15 or more minutes late is lower than 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 December 2023 – July 2026
From pushback to gate
When it leaves SEA late, does that still matter by the time it reaches DEN?
F93406 pushes back an average of 11.6 minutes late and reaches the gate at DEN an average of 8.3 minutes late. The 3.3 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 21.0 minutes on the taxiways at SEA, 2.1 minutes longer than a typical SEA departure in the same hour.
On arrival at DEN, F93406 spends 17.0 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 7.2 minutes longer than a typical DEN arrival (9.8 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 DEN. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 21,263 departures from SEA scheduled in the clock hour F93406 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at DEN (963,027 flights), not just F93406’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · December 2023 – July 2026
The hour it leaves SEA
Part of any flight’s record belongs to the clock rather than to the flight. F93406 has one departure time, so this is what that time is worth.
On-time arrival rate. 21,263 departures from SEA are scheduled in the 6 AM–7 AM hour over the period, against 510,205 across the whole day.
F93406 is scheduled out of SEA at 6:25 AM, in the 6 AM–7 AM bank. Departures from SEA in that hour arrive on time 91.2% of the time against 79.1% across the airport’s whole day — the slot alone is worth 12.1 points better before anything about this particular flight is considered.
The two airport figures cover every departure from SEA 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 · December 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.
41 min late
against a median of 4 min early
Percentiles over 654 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering December 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 |
|---|---|---|---|---|
| AS682 | Alaska Airlines | 86.6% | 8 min early | 953 |
| UA757 | United Airlines | 84.3% | 9 min early | 1,127 |
| F93406 this flight | Frontier Airlines | 75.5% | 4 min early | 654 |
| AS642 | Alaska Airlines | 75.5% | 2 min early | 676 |
| AS620 | Alaska Airlines | 73.1% | 2 min early | 731 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. F93406 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 654 records of F93406 operating SEA → DEN, 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
Analysis last recomputed