Flight number record
F9 3375
Frontier Airlines · Kansas City to Denver
- Route
- MCI → DEN
- Departs
- 13:45
- Flights
- 285
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 3375, check with Frontier Airlines.
F9 3375 lands a B+, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That rests on 285 flights, with a median arrival 10 minutes early.
Key figures
On time
79.6%
Arrivals under 15 minutes late, of 284 completed flights
Avg delay
118 min
Across delayed arrivals only, not all flights
Cancelled
0.35%
National rate is 1.89%
1 hour+ late
10.2%
National rate is 8.3%
These figures cover 285 flights between September 2025 and August 2026. Beyond the headline rate, 10.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When F9 3375 flies
F9 3375 flies MCI to DEN without a single fixed slot. Its most common scheduled departure was 13:45, used on 70 of 285 flights, with 14:34 (35 flights) next.
- Departs 13:4570 flights24.6%
- Departs 14:3435 flights12.3%
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 13:45 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and F9 3375 runs level with that at 79.6%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
F9 3375 next to MCI to DEN
Every carrier on MCI to DEN combined arrived on time 78.1% of the time across 4,370 flights, so F9 3375 is 2 points ahead of it. Across its whole network Frontier Airlines managed 72.7%, which this flight beats by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 3375thin sample | 285 | 79.6% | 118 min | 0.35% | B+ |
| All Frontier Airlines on MCI–DENthin sample | 292 | 79.0% | 115 min | 0.34% | B+ |
| All carriers on MCI–DEN | 4,370 | 78.1% | 67 min | 0.53% | B+ |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 3375 quarter by quarter
Quarter by quarter F9 3375 held fairly steady: 81.4% in Oct–Dec 2025, 80.4% in Jan–Mar 2026, 78.3% in Apr–Jun 2026 and 82.8% in Jul–Sep 2026. A spread of 5 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 202570 flights81.4%
- Jan–Mar 202657 flights80.4%
- Apr–Jun 202683 flights78.3%
- Jul–Sep 202658 flights82.8%
Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, F9 3375 did best on Thursday at 86.4% on time and worst on Monday at 69.8%. Each day rests on about 41 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 3375 runs when it is late
F9 3375 often beats the schedule: 119 of 284 completed flights, 42%, arrived 15 minutes or more early. The 58 late arrivals split 12 under half an hour, 17 between 30 and 60 minutes, and 29 an hour or more.
- 15+ min early119 flights41.9%
- Within 15 min107 flights37.7%
- 15–29 min late12 flights4.2%
- 30–59 min late17 flights6.0%
- 1–2 hours late15 flights5.3%
- 2+ hours late14 flights4.9%
Scale runs 0% to 100%.
Share of 284 completed flights by arrival against schedule.
17 of 63 late departures made up the time and arrived on time, 27% of them. 12 flights left on time and still arrived late.
The worst days
Worst days for F9 3375
The latest arrival of the period was on 4 May 2026, 19 hours 44 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in May 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 4 May 2026 | 19 hours 44 minutes | Late-arriving aircraft |
| 6 March 2026 | 13 hours 22 minutes | Carrier |
| 1 June 2026 | 9 hours 49 minutes | National Airspace System |
| 18 May 2026 | 5 hours 57 minutes | Carrier |
| 29 May 2026 | 4 hours 7 minutes | Late-arriving aircraft |
Delay causes
Why F9 3375 runs late
Late-arriving aircraft accounts for 59% of the 6,849 delay minutes carriers reported here, and the remaining four split what is left.
- 59%Late-arriving aircraft
- 22%Carrier
- 18%National Airspace System
- 1%Extreme weather
59% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 6,849 reported delay minutes here, that single category outweighs weather by 59 to one. The split is drawn from 6,849 delay minutes reported on F9 3375.
Cancellations are rare at 0.35%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
10.2% 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 533 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 285 flights under F9 3375 in the data flew MCI to DEN. 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. 285 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 3375
For a booking, read F9 3375 as 79.6% on time with 0.35% cancelled over 285 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- MCI to DEN, every carrier and departure
- DEN to MCI, the return direction
- United Airlines 708 on the same route88.7%
- United Airlines 2123 on the same route65.1%
- Kansas City International (MCI) delay statistics
- Denver International (DEN) 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.