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Flight Reliability

F9 2440 · Frontier Airlines

Denver → Raleigh–Durham (DEN–RDU)

86
Pretty Reliable
WanderNerd Reliability Score
84%
Arrive within 15 minutes
1 min early
Average arrival delay
1.4%
Cancelled
10 min early
Median arrival delay

Based on 279 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

F9 2440 departing between 6–9 AM arrived on time 100% of the time, versus 77% between 3–6 PM.

Mondays have been rough.

F9 2440 arrived on time 100% of the time on Wednesdays and just 75% on Mondays. That gap is worth planning around.

Better than the DEN–RDU route average.

F9 2440 arrived on time 84% of the time, versus 75% across the DEN–RDU route.

Better than the Frontier Airlines network average.

F9 2440 arrived on time 84% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon75%(52 flights)
  • Tue87%(23 flights)
  • Wed100%(13 flights)
  • Thu90%(48 flights)
  • Fri79%(52 flights)
  • Sat97%(37 flights)
  • Sun78%(50 flights)
On-time by departure window
  • 6–9 AM100%(29 flights)
  • 9 AM–12 PM83%(144 flights)
  • 12–3 PM81%(85 flights)
  • 3–6 PM77%(17 flights)
On-time trend by month
97%
May

Jun 67% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202567%24
July 202585%26
August 202592%24
September 202577%17
October 202586%21
November 202586%21
December 202574%23
January 202688%16
February 202694%18
March 202686%28
April 202678%27
May 202697%30
Departures on time
81%
Diverted
0%
Flights flown
275
Months covered
12

Same route, other flights

Keep nerding

Based on 279 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.