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Flight Reliability

F9 4181 · Frontier Airlines

Houston → Phoenix (IAH–PHX)

52
A Little Dicey
WanderNerd Reliability Score
62%
Arrive within 15 minutes
23 min
Average arrival delay
2.1%
Cancelled
2 min
Median arrival delay

Based on 140 historical flights. Data through May 2026.

What the data says

9 PM–12 AM has a slight edge.

Departures between 9 PM–12 AM arrived on time 63% of the time, against 60% between 12–3 PM.

Friday is doing you no favors.

F9 4181 arrived on time 74% of the time on Sundays and just 40% on Fridays. That gap is worth planning around.

Well behind the IAH–PHX route.

F9 4181 arrived on time 62% of the time, versus 79% across the IAH–PHX route.

Lagging the Frontier Airlines network.

F9 4181 arrived on time 62% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon53%(32 flights)
  • Tue—(3 flights)
  • Wed—(3 flights)
  • Thu71%(31 flights)
  • Fri40%(25 flights)
  • Sat64%(11 flights)
  • Sun74%(31 flights)
On-time by departure window
  • 9 AM–12 PM—(1 flights)
  • 12–3 PM60%(42 flights)
  • 3–6 PM—(2 flights)
  • 6–9 PM—(7 flights)
  • 9 PM–12 AM63%(84 flights)
On-time trend by month
50%
Feb

Jun 19% → Feb 50% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202519%16
July 202575%16
August 202569%16
October 202539%13
November 202568%19
December 202576%21
February 202650%10
Departures on time
69%
Diverted
0.7%
Flights flown
136
Months covered
10

Same route, other flights

Keep nerding

Based on 140 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.