Flight Reliability
F9 3869 · Frontier Airlines
Buffalo → Atlanta (BUF–ATL)
43
Bring Snacks
WanderNerd Reliability Score
- 68%
- Arrive within 15 minutes
- 19 min
- Average arrival delay
- 7.0%
- Cancelled
- 4 min
- Median arrival delay
Based on 86 historical flights. Data through May 2026.
What the data says
3–6 PM has a slight edge.
Departures between 3–6 PM arrived on time 73% of the time, against 68% between 12–3 PM.
Mondays have been rough.
F9 3869 arrived on time 78% of the time on Thursdays and just 50% on Mondays. That gap is worth planning around.
Lagging the BUF–ATL route.
F9 3869 arrived on time 68% of the time, versus 81% across the BUF–ATL route.
A bit behind the Frontier Airlines network.
F9 3869 arrived on time 68% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon50%(10 flights)
- Tue73%(11 flights)
- Wed—(0 flights)
- Thu78%(18 flights)
- Fri70%(10 flights)
- Sat69%(13 flights)
- Sun61%(18 flights)
- 9 AM–12 PM—(1 flights)
- 12–3 PM68%(68 flights)
- 3–6 PM73%(11 flights)
63%
Feb
Jun 67% → Feb 63% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 67% | 15 |
| July 2025 | 75% | 16 |
| August 2025 | 69% | 16 |
| January 2026 | 60% | 10 |
| February 2026 | 63% | 19 |
- Departures on time
- 65%
- Diverted
- 0%
- Flights flown
- 80
- Months covered
- 7
Same route, other flights
Keep nerding
Based on 86 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.