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Flight Reliability

F9 3220 · Frontier Airlines

Salt Lake City → Denver (SLC–DEN)

85
Pretty Reliable
WanderNerd Reliability Score
80%
Arrive within 15 minutes
1 min
Average arrival delay
0.8%
Cancelled
13 min early
Median arrival delay

Based on 129 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

F9 3220 departing between 9 PM–12 AM arrived on time 88% of the time, versus 64% between 3–6 PM.

Skip Thursday if you can.

F9 3220 arrived on time 85% of the time on Mondays. On Thursdays: 73%.

A bit ahead of the Frontier Airlines network.

F9 3220 arrived on time 80% of the time, versus 73% across the Frontier Airlines network.

Trending in the right direction.

F9 3220 arrived on time 88% of the time over the last three months in the data, compared with 75% in the three months before that.

The breakdown

On-time by weekday
  • Mon85%(20 flights)
  • Tue80%(20 flights)
  • Wed77%(13 flights)
  • Thu73%(26 flights)
  • Fri75%(20 flights)
  • Sat—(9 flights)
  • Sun85%(20 flights)
On-time by departure window
  • 3–6 PM64%(11 flights)
  • 6–9 PM73%(52 flights)
  • 9 PM–12 AM88%(65 flights)
On-time trend by month
94%
Apr

Jul 57% → Apr 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
July 202557%14
December 202579%14
January 202689%18
February 202695%20
March 202676%21
April 202694%17
Departures on time
81%
Diverted
0%
Flights flown
128
Months covered
10

Same route, other flights

Keep nerding

Based on 129 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.