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Flight Reliability

F9 4626 · Frontier Airlines

Denver → Memphis (DEN–MEM)

87
Pretty Reliable
WanderNerd Reliability Score
82%
Arrive within 15 minutes
0 min
Average arrival delay
0.7%
Cancelled
11 min early
Median arrival delay

Based on 136 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

F9 4626 departing between 12–3 PM arrived on time 96% of the time, versus 77% between 9 AM–12 PM.

Thursdays have been rough.

F9 4626 arrived on time 93% of the time on Fridays and just 77% on Thursdays. That gap is worth planning around.

A bit ahead of the DEN–MEM route.

F9 4626 arrived on time 82% of the time, versus 76% across the DEN–MEM route.

Better than the Frontier Airlines network average.

F9 4626 arrived on time 82% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon92%(25 flights)
  • Tue—(2 flights)
  • Wed—(2 flights)
  • Thu77%(44 flights)
  • Fri93%(15 flights)
  • Sat—(0 flights)
  • Sun79%(47 flights)
On-time by departure window
  • 6–9 AM—(1 flights)
  • 9 AM–12 PM77%(17 flights)
  • 12–3 PM96%(26 flights)
  • 3–6 PM79%(91 flights)
On-time trend by month
100%
May

Aug 70% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 202570%10
September 2025100%12
October 202592%13
November 2025100%13
December 202577%13
January 202680%10
February 202692%13
March 202662%13
May 2026100%11
Departures on time
80%
Diverted
0%
Flights flown
135
Months covered
12

Same route, other flights

Keep nerding

Based on 136 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.