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Flight Reliability

F9 3358 · Frontier Airlines

Spokane → Denver (GEG–DEN)

83
Pretty Reliable
WanderNerd Reliability Score
75%
Arrive within 15 minutes
2 min
Average arrival delay
0%
Cancelled
6 min early
Median arrival delay

Based on 121 historical flights. Data through May 2026.

What the data says

12–3 PM has a slight edge.

Departures between 12–3 PM arrived on time 78% of the time, against 73% between 9 AM–12 PM.

Tuesdays have been rough.

F9 3358 arrived on time 91% of the time on Fridays and just 58% on Tuesdays. That gap is worth planning around.

Lagging the GEG–DEN route.

F9 3358 arrived on time 75% of the time, versus 84% across the GEG–DEN route.

It basically never cancels.

Out of 121 scheduled flights, only 0.0% were cancelled.

The breakdown

On-time by weekday
  • Mon—(3 flights)
  • Tue58%(12 flights)
  • Wed—(0 flights)
  • Thu63%(43 flights)
  • Fri91%(11 flights)
  • Sat—(5 flights)
  • Sun87%(47 flights)
On-time by departure window
  • 9 AM–12 PM73%(73 flights)
  • 12–3 PM78%(46 flights)
  • 3–6 PM—(2 flights)
On-time trend by month
90%
Dec

Jun 46% → Dec 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202546%11
July 202564%14
August 202573%11
September 202583%12
October 202570%10
November 202590%10
December 202590%10
Departures on time
78%
Diverted
0%
Flights flown
121
Months covered
12

Same route, other flights

Keep nerding

Based on 121 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.