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Flight Reliability

F9 3862 · Frontier Airlines

Salt Lake City → Denver (SLC–DEN)

81
Pretty Reliable
WanderNerd Reliability Score
78%
Arrive within 15 minutes
6 min
Average arrival delay
0.8%
Cancelled
4 min early
Median arrival delay

Based on 360 historical flights. Data through May 2026.

What the data says

Tuesdays have been rough.

F9 3862 arrived on time 89% of the time on Sundays and just 65% on Tuesdays. That gap is worth planning around.

A bit ahead of the Frontier Airlines network.

F9 3862 arrived on time 78% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon83%(52 flights)
  • Tue65%(52 flights)
  • Wed68%(50 flights)
  • Thu79%(52 flights)
  • Fri76%(50 flights)
  • Sat83%(47 flights)
  • Sun89%(53 flights)
On-time by departure window
  • 6–9 AM77%(347 flights)
  • 9 AM–12 PM—(9 flights)
On-time trend by month
52%
May

Jun 67% → May 52% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202567%30
July 202562%29
August 202577%31
September 202576%29
October 202594%31
November 202580%30
December 202580%30
January 202666%29
February 202693%27
March 202690%31
April 202696%28
May 202652%31
Departures on time
90%
Diverted
0.3%
Flights flown
356
Months covered
12

Same route, other flights

Keep nerding

Based on 360 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.