Flight Reliability
F9 3872 · Frontier Airlines
Phoenix → Salt Lake City (PHX–SLC)
88
Pretty Reliable
WanderNerd Reliability Score
- 89%
- Arrive within 15 minutes
- 8 min early
- Average arrival delay
- 2.2%
- Cancelled
- 15 min early
- Median arrival delay
Based on 46 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
F9 3872 arrived on time 100% of the time on Tuesdays and just 83% on Sundays. That gap is worth planning around.
A bit ahead of the PHX–SLC route.
F9 3872 arrived on time 89% of the time, versus 84% across the PHX–SLC route.
Well ahead of the Frontier Airlines network.
F9 3872 arrived on time 89% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon—(1 flights)
- Tue100%(10 flights)
- Wed—(9 flights)
- Thu—(4 flights)
- Fri—(3 flights)
- Sat—(6 flights)
- Sun83%(12 flights)
- 6–9 AM—(8 flights)
- 9 AM–12 PM—(7 flights)
- 12–3 PM93%(15 flights)
- 3–6 PM—(9 flights)
- 6–9 PM—(6 flights)
- Departures on time
- 89%
- Diverted
- 0%
- Flights flown
- 45
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 46 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.