Flight Reliability
F9 3644 · Frontier Airlines
Los Angeles → Phoenix (LAX–PHX)
68
Usually Fine
WanderNerd Reliability Score
- 70%
- Arrive within 15 minutes
- 16 min
- Average arrival delay
- 1.8%
- Cancelled
- 4 min early
- Median arrival delay
Based on 166 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
F9 3644 arrived on time 100% of the time on Tuesdays and just 50% on Sundays. That gap is worth planning around.
Lagging the LAX–PHX route.
F9 3644 arrived on time 70% of the time, versus 82% across the LAX–PHX route.
A bit behind the Frontier Airlines network.
F9 3644 arrived on time 70% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon74%(31 flights)
- Tue100%(11 flights)
- Wed73%(15 flights)
- Thu74%(31 flights)
- Fri59%(22 flights)
- Sat84%(19 flights)
- Sun50%(34 flights)
- 12–3 PM—(8 flights)
- 3–6 PM—(6 flights)
- 6–9 PM70%(64 flights)
- 9 PM–12 AM68%(85 flights)
69%
May
Sep 75% → May 69% on time
| Month | On-time percentage | Flights |
|---|---|---|
| September 2025 | 75% | 16 |
| October 2025 | 78% | 23 |
| November 2025 | 60% | 25 |
| January 2026 | 85% | 13 |
| February 2026 | 68% | 19 |
| March 2026 | 70% | 23 |
| April 2026 | 67% | 15 |
| May 2026 | 69% | 13 |
- Departures on time
- 71%
- Diverted
- 0%
- Flights flown
- 163
- Months covered
- 11
Same route, other flights
Keep nerding
Based on 166 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.