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Flight Reliability

F9 3163 · Frontier Airlines

Seattle → Ontario (SEA–ONT)

76
Usually Fine
WanderNerd Reliability Score
74%
Arrive within 15 minutes
11 min
Average arrival delay
1.3%
Cancelled
3 min early
Median arrival delay

Based on 155 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

F9 3163 departing between 12–3 PM arrived on time 74% of the time, versus 64% between 6–9 PM.

Saturdays have been rough.

F9 3163 arrived on time 85% of the time on Sundays and just 60% on Saturdays. That gap is worth planning around.

Lagging the SEA–ONT route.

F9 3163 arrived on time 74% of the time, versus 83% across the SEA–ONT route.

Slipping a little lately.

F9 3163 arrived on time 72% of the time over the last three months in the data, compared with 77% in the three months before that.

The breakdown

On-time by weekday
  • Mon63%(30 flights)
  • Tue71%(14 flights)
  • Wed75%(12 flights)
  • Thu72%(18 flights)
  • Fri81%(31 flights)
  • Sat60%(15 flights)
  • Sun85%(33 flights)
On-time by departure window
  • 6–9 AM—(9 flights)
  • 9 AM–12 PM67%(15 flights)
  • 12–3 PM74%(116 flights)
  • 3–6 PM—(2 flights)
  • 6–9 PM64%(11 flights)
On-time trend by month
47%
Dec

Jun 72% → Dec 47% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202572%29
July 202553%30
August 202584%25
September 202594%17
October 202593%14
November 202577%17
December 202547%15
Departures on time
73%
Diverted
0%
Flights flown
153
Months covered
8

Same route, other flights

Keep nerding

Based on 155 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.