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Flight Reliability

F9 3375 · Frontier Airlines

Kansas City → Denver (MCI–DEN)

74
Usually Fine
WanderNerd Reliability Score
74%
Arrive within 15 minutes
22 min
Average arrival delay
0.4%
Cancelled
7 min early
Median arrival delay

Based on 239 historical flights. Data through May 2026.

What the data says

12–3 PM has a slight edge.

Departures between 12–3 PM arrived on time 78% of the time, against 71% between 3–6 PM.

Mondays have been rough.

F9 3375 arrived on time 91% of the time on Tuesdays and just 64% on Mondays. That gap is worth planning around.

Slipping a little lately.

F9 3375 arrived on time 77% of the time over the last three months in the data, compared with 80% in the three months before that.

The breakdown

On-time by weekday
  • Mon64%(52 flights)
  • Tue91%(11 flights)
  • Wed68%(28 flights)
  • Thu85%(33 flights)
  • Fri64%(50 flights)
  • Sat82%(27 flights)
  • Sun84%(37 flights)
On-time by departure window
  • 12–3 PM78%(49 flights)
  • 3–6 PM71%(24 flights)
  • 6–9 PM73%(164 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
77%
May

Jun 29% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202529%14
July 202546%13
August 202567%15
September 202565%17
October 202579%24
November 202593%27
December 202574%19
January 202688%16
February 202680%20
March 202675%20
April 202677%22
May 202677%31
Departures on time
70%
Diverted
0%
Flights flown
238
Months covered
12

Same route, other flights

Keep nerding

Based on 239 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.