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Flight Reliability

F9 3982 · Frontier Airlines

Salt Lake City → Denver (SLC–DEN)

83
Pretty Reliable
WanderNerd Reliability Score
77%
Arrive within 15 minutes
9 min
Average arrival delay
0.4%
Cancelled
9 min early
Median arrival delay

Based on 243 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

F9 3982 departing between 9 AM–12 PM arrived on time 85% of the time, versus 57% between 3–6 PM.

Sunday scaries are real for this one.

F9 3982 arrived on time 88% of the time on Wednesdays and just 65% on Sundays. That gap is worth planning around.

A bit ahead of the Frontier Airlines network.

F9 3982 arrived on time 77% of the time, versus 73% across the Frontier Airlines network.

Ticking up lately.

F9 3982 arrived on time 90% of the time over the last three months in the data, compared with 85% in the three months before that.

The breakdown

On-time by weekday
  • Mon67%(39 flights)
  • Tue84%(25 flights)
  • Wed88%(33 flights)
  • Thu87%(39 flights)
  • Fri71%(38 flights)
  • Sat84%(25 flights)
  • Sun65%(43 flights)
On-time by departure window
  • 9 AM–12 PM85%(84 flights)
  • 12–3 PM78%(121 flights)
  • 3–6 PM57%(37 flights)
On-time trend by month
92%
Apr

Jun 59% → Apr 92% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202559%27
July 202568%25
August 202567%27
September 202569%26
October 202585%27
November 202571%21
December 202591%11
January 202693%14
February 2026100%10
March 202678%27
April 202692%24
Departures on time
77%
Diverted
0%
Flights flown
242
Months covered
12

Same route, other flights

Keep nerding

Based on 243 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.