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Flight Reliability

F9 3227 · Frontier Airlines

Houston → Denver (IAH–DEN)

78
Usually Fine
WanderNerd Reliability Score
70%
Arrive within 15 minutes
10 min
Average arrival delay
0%
Cancelled
3 min
Median arrival delay

Based on 184 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

F9 3227 departing between 3–6 PM arrived on time 77% of the time, versus 50% between 6–9 PM.

Thursdays have been rough.

F9 3227 arrived on time 93% of the time on Wednesdays and just 63% on Thursdays. That gap is worth planning around.

Lagging the IAH–DEN route.

F9 3227 arrived on time 70% of the time, versus 82% across the IAH–DEN route.

A bit behind the Frontier Airlines network.

F9 3227 arrived on time 70% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon67%(33 flights)
  • Tue87%(15 flights)
  • Wed93%(15 flights)
  • Thu63%(32 flights)
  • Fri65%(31 flights)
  • Sat74%(31 flights)
  • Sun63%(27 flights)
On-time by departure window
  • 12–3 PM60%(10 flights)
  • 3–6 PM77%(39 flights)
  • 6–9 PM50%(28 flights)
  • 9 PM–12 AM74%(107 flights)
On-time trend by month
67%
May

Jun 73% → May 67% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%30
July 202571%31
August 202563%27
September 202567%21
November 202562%13
January 202669%13
February 202686%14
May 202667%21
Departures on time
72%
Diverted
0%
Flights flown
184
Months covered
11

Same route, other flights

Keep nerding

Based on 184 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.