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Flight Reliability

F9 3206 · Frontier Airlines

Denver → Houston (DEN–IAH)

91
Nerd Approved
WanderNerd Reliability Score
85%
Arrive within 15 minutes
5 min early
Average arrival delay
0.3%
Cancelled
13 min early
Median arrival delay

Based on 315 historical flights. Data through May 2026.

What the data says

Mornings have a slight edge.

Departures between 3–6 AM arrived on time 88% of the time, against 85% between 9 AM–12 PM.

Sunday scaries are real for this one.

F9 3206 arrived on time 91% of the time on Thursdays. On Sundays: 78%.

A bit ahead of the DEN–IAH route.

F9 3206 arrived on time 85% of the time, versus 79% across the DEN–IAH route.

Better than the Frontier Airlines network average.

F9 3206 arrived on time 85% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon86%(51 flights)
  • Tue89%(35 flights)
  • Wed86%(36 flights)
  • Thu91%(46 flights)
  • Fri79%(52 flights)
  • Sat91%(43 flights)
  • Sun78%(50 flights)
On-time by departure window
  • 3–6 AM88%(17 flights)
  • 6–9 AM86%(236 flights)
  • 9 AM–12 PM85%(47 flights)
  • 12–3 PM—(8 flights)
  • 3–6 PM—(5 flights)
On-time trend by month
81%
May

Jun 83% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%30
July 202581%31
August 202594%31
September 202591%22
October 202590%30
November 202573%30
December 202582%27
January 202685%26
February 2026100%16
March 202687%15
April 202688%24
May 202681%31
Departures on time
86%
Diverted
0.3%
Flights flown
313
Months covered
12

Same route, other flights

Keep nerding

Based on 315 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.