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Flight Reliability

F9 2908 · Frontier Airlines

Ontario → Denver (ONT–DEN)

51
A Little Dicey
WanderNerd Reliability Score
61%
Arrive within 15 minutes
32 min
Average arrival delay
1.8%
Cancelled
3 min
Median arrival delay

Based on 168 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

F9 2908 departing between 9 AM–12 PM arrived on time 91% of the time, versus 52% between 3–6 PM.

Tuesdays have been rough.

F9 2908 arrived on time 68% of the time on Fridays and just 46% on Tuesdays. That gap is worth planning around.

Well behind the ONT–DEN route.

F9 2908 arrived on time 61% of the time, versus 79% across the ONT–DEN route.

Lagging the Frontier Airlines network.

F9 2908 arrived on time 61% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon55%(29 flights)
  • Tue46%(11 flights)
  • Wed50%(10 flights)
  • Thu64%(36 flights)
  • Fri68%(31 flights)
  • Sat64%(14 flights)
  • Sun62%(34 flights)
On-time by departure window
  • 9 AM–12 PM91%(23 flights)
  • 12–3 PM86%(14 flights)
  • 3–6 PM52%(128 flights)
On-time trend by month
86%
May

Jun 33% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202533%24
July 202540%30
August 202560%25
September 202547%17
October 202583%18
November 202586%14
May 202686%14
Departures on time
61%
Diverted
0%
Flights flown
165
Months covered
11

Same route, other flights

Keep nerding

Based on 168 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.