Flight Reliability
F9 1448 · Frontier Airlines
San Francisco → Atlanta (SFO–ATL)
43
Bring Snacks
WanderNerd Reliability Score
- 58%
- Arrive within 15 minutes
- 31 min
- Average arrival delay
- 2.9%
- Cancelled
- 7 min
- Median arrival delay
Based on 306 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
F9 1448 arrived on time 70% of the time on Saturdays and just 40% on Fridays. That gap is worth planning around.
Well behind the SFO–ATL route.
F9 1448 arrived on time 58% of the time, versus 82% across the SFO–ATL route.
Lagging the Frontier Airlines network.
F9 1448 arrived on time 58% of the time, versus 73% across the Frontier Airlines network.
Slipping a little lately.
F9 1448 arrived on time 58% of the time over the last three months in the data, compared with 61% in the three months before that.
The breakdown
- Mon60%(48 flights)
- Tue62%(29 flights)
- Wed60%(30 flights)
- Thu58%(48 flights)
- Fri40%(47 flights)
- Sat70%(47 flights)
- Sun57%(47 flights)
68%
May
Jun 52% → May 68% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 52% | 29 |
| July 2025 | 47% | 30 |
| August 2025 | 42% | 26 |
| September 2025 | 67% | 21 |
| October 2025 | 86% | 21 |
| November 2025 | 63% | 24 |
| December 2025 | 52% | 23 |
| January 2026 | 63% | 16 |
| February 2026 | 68% | 19 |
| March 2026 | 82% | 27 |
| April 2026 | 24% | 29 |
| May 2026 | 68% | 31 |
- Departures on time
- 48%
- Diverted
- 0.3%
- Flights flown
- 296
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 306 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.