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Flight Reliability

F9 3231 · Frontier Airlines

Cleveland → Las Vegas (CLE–LAS)

79
Usually Fine
WanderNerd Reliability Score
78%
Arrive within 15 minutes
7 min
Average arrival delay
1.9%
Cancelled
6 min early
Median arrival delay

Based on 266 historical flights. Data through May 2026.

What the data says

The 9 AM–12 PM departure wins.

F9 3231 departing between 9 AM–12 PM arrived on time 89% of the time, versus 75% between 6–9 AM.

Tuesdays have been rough.

F9 3231 arrived on time 87% of the time on Thursdays and just 65% on Tuesdays. That gap is worth planning around.

A bit ahead of the Frontier Airlines network.

F9 3231 arrived on time 78% of the time, versus 73% across the Frontier Airlines network.

Trending in the right direction.

F9 3231 arrived on time 81% of the time over the last three months in the data, compared with 58% in the three months before that.

The breakdown

On-time by weekday
  • Mon80%(46 flights)
  • Tue65%(23 flights)
  • Wed70%(23 flights)
  • Thu87%(46 flights)
  • Fri80%(45 flights)
  • Sat83%(47 flights)
  • Sun68%(31 flights)
On-time by departure window
  • 6–9 AM75%(203 flights)
  • 9 AM–12 PM89%(52 flights)
  • 12–3 PM—(3 flights)
  • 3–6 PM—(2 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
73%
May

Jun 85% → May 73% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202585%20
July 202588%17
August 202595%20
September 202594%17
October 202585%20
November 202583%24
December 202559%29
February 202633%18
March 202681%31
April 202689%28
May 202673%30
Departures on time
80%
Diverted
0%
Flights flown
261
Months covered
12

Same route, other flights

Keep nerding

Based on 266 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.