Flight Reliability
F9 1449 · Frontier Airlines
Atlanta → Denver (ATL–DEN)
42
Bring Snacks
WanderNerd Reliability Score
- 53%
- Arrive within 15 minutes
- 33 min
- Average arrival delay
- 1.1%
- Cancelled
- 13 min
- Median arrival delay
Based on 174 historical flights. Data through May 2026.
What the data says
Morning flights do better here.
F9 1449 departing between 9 AM–12 PM arrived on time 85% of the time, versus 44% between 6–9 PM.
Mondays have been rough.
F9 1449 arrived on time 63% of the time on Sundays and just 30% on Mondays. That gap is worth planning around.
Well behind the ATL–DEN route.
F9 1449 arrived on time 53% of the time, versus 77% across the ATL–DEN route.
Well behind the Frontier Airlines network.
F9 1449 arrived on time 53% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon30%(27 flights)
- Tue47%(17 flights)
- Wed55%(20 flights)
- Thu57%(30 flights)
- Fri62%(26 flights)
- Sat54%(24 flights)
- Sun63%(27 flights)
- 6–9 AM78%(18 flights)
- 9 AM–12 PM85%(13 flights)
- 12–3 PM—(8 flights)
- 3–6 PM—(6 flights)
- 6–9 PM44%(126 flights)
78%
May
Jun 13% → May 78% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 13% | 24 |
| July 2025 | 40% | 30 |
| August 2025 | 60% | 30 |
| September 2025 | 55% | 22 |
| October 2025 | 67% | 30 |
| November 2025 | 60% | 15 |
| May 2026 | 78% | 18 |
- Departures on time
- 50%
- Diverted
- 0.6%
- Flights flown
- 171
- Months covered
- 9
Same route, other flights
Keep nerding
Based on 174 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.