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Flight Reliability

F9 4689 · Frontier Airlines

Dallas–Fort Worth → Ontario (DFW–ONT)

86
Pretty Reliable
WanderNerd Reliability Score
80%
Arrive within 15 minutes
0 min
Average arrival delay
0.7%
Cancelled
11 min early
Median arrival delay

Based on 148 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

F9 4689 departing between 12–3 PM arrived on time 92% of the time, versus 69% between 3–6 PM.

Mondays have been rough.

F9 4689 arrived on time 96% of the time on Fridays and just 65% on Mondays. That gap is worth planning around.

Better than the DFW–ONT route average.

F9 4689 arrived on time 80% of the time, versus 69% across the DFW–ONT route.

Better than the Frontier Airlines network average.

F9 4689 arrived on time 80% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon65%(23 flights)
  • Tue79%(14 flights)
  • Wed86%(14 flights)
  • Thu89%(26 flights)
  • Fri96%(22 flights)
  • Sat89%(18 flights)
  • Sun67%(30 flights)
On-time by departure window
  • 9 AM–12 PM—(2 flights)
  • 12–3 PM92%(60 flights)
  • 3–6 PM69%(68 flights)
  • 6–9 PM—(8 flights)
  • 9 PM–12 AM—(9 flights)
On-time trend by month
71%
May

Dec 84% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
December 202584%19
January 202687%15
February 2026100%14
March 202686%29
April 202682%28
May 202671%31
Departures on time
76%
Diverted
0%
Flights flown
147
Months covered
9

Same route, other flights

Keep nerding

Based on 148 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.