Flight Reliability
F9 2751 · Frontier Airlines
Buffalo → Denver (BUF–DEN)
72
Usually Fine
WanderNerd Reliability Score
- 64%
- Arrive within 15 minutes
- 10 min
- Average arrival delay
- 0%
- Cancelled
- 6 min early
- Median arrival delay
Based on 59 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
F9 2751 departing between 12–3 PM arrived on time 82% of the time, versus 54% between 3–6 PM.
Mondays have been rough.
F9 2751 arrived on time 76% of the time on Fridays and just 59% on Mondays. That gap is worth planning around.
Well behind the BUF–DEN route.
F9 2751 arrived on time 64% of the time, versus 81% across the BUF–DEN route.
Lagging the Frontier Airlines network.
F9 2751 arrived on time 64% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon59%(22 flights)
- Tue—(0 flights)
- Wed—(9 flights)
- Thu—(0 flights)
- Fri76%(21 flights)
- Sat—(0 flights)
- Sun—(7 flights)
- 12–3 PM82%(22 flights)
- 3–6 PM54%(37 flights)
46%
Sep
Jun 73% → Sep 46% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 73% | 11 |
| July 2025 | 62% | 13 |
| August 2025 | 69% | 13 |
| September 2025 | 46% | 13 |
- Departures on time
- 64%
- Diverted
- 0%
- Flights flown
- 59
- Months covered
- 5
Same route, other flights
Keep nerding
Based on 59 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.