Flight Reliability
F9 3381 · Frontier Airlines
San Diego → San Francisco (SAN–SFO)
54
A Little Dicey
WanderNerd Reliability Score
- 66%
- Arrive within 15 minutes
- 31 min
- Average arrival delay
- 2.5%
- Cancelled
- 9 min early
- Median arrival delay
Based on 79 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
F9 3381 departing between 12–3 PM arrived on time 86% of the time, versus 39% between 6–9 PM.
Friday is doing you no favors.
F9 3381 arrived on time 80% of the time on Sundays and just 38% on Fridays. That gap is worth planning around.
A bit behind the Frontier Airlines network.
F9 3381 arrived on time 66% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon77%(17 flights)
- Tue—(2 flights)
- Wed—(3 flights)
- Thu60%(15 flights)
- Fri38%(16 flights)
- Sat—(9 flights)
- Sun80%(15 flights)
- 9 AM–12 PM80%(30 flights)
- 12–3 PM86%(14 flights)
- 3–6 PM60%(10 flights)
- 6–9 PM39%(23 flights)
53%
Dec
Oct 69% → Dec 53% on time
| Month | On-time percentage | Flights |
|---|---|---|
| October 2025 | 69% | 16 |
| November 2025 | 91% | 22 |
| December 2025 | 53% | 19 |
- Departures on time
- 68%
- Diverted
- 0%
- Flights flown
- 77
- Months covered
- 7
Same route, other flights
Keep nerding
Based on 79 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.