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Flight Reliability

F9 4131 · Frontier Airlines

Houston → Las Vegas (IAH–LAS)

59
A Little Dicey
WanderNerd Reliability Score
70%
Arrive within 15 minutes
39 min
Average arrival delay
1.3%
Cancelled
4 min early
Median arrival delay

Based on 153 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

F9 4131 departing between 12–3 PM arrived on time 84% of the time, versus 62% between 6–9 PM.

Friday is doing you no favors.

F9 4131 arrived on time 86% of the time on Thursdays and just 47% on Fridays. That gap is worth planning around.

Lagging the IAH–LAS route.

F9 4131 arrived on time 70% of the time, versus 83% across the IAH–LAS route.

Trending in the right direction.

F9 4131 arrived on time 83% of the time over the last three months in the data, compared with 71% in the three months before that.

The breakdown

On-time by weekday
  • Mon69%(39 flights)
  • Tue—(9 flights)
  • Wed80%(10 flights)
  • Thu86%(28 flights)
  • Fri47%(36 flights)
  • Sat—(7 flights)
  • Sun77%(22 flights)
On-time by departure window
  • 9 AM–12 PM—(6 flights)
  • 12–3 PM84%(44 flights)
  • 3–6 PM80%(10 flights)
  • 6–9 PM62%(74 flights)
  • 9 PM–12 AM65%(17 flights)
On-time trend by month
86%
May

Jun 36% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202536%11
August 202554%13
September 202565%17
October 202573%15
November 202574%19
January 202690%10
April 202671%14
May 202686%29
Departures on time
68%
Diverted
0%
Flights flown
151
Months covered
12

Same route, other flights

Keep nerding

Based on 153 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.