Flight Reliability
F9 4559 · Frontier Airlines
Washington → Dallas–Fort Worth (IAD–DFW)
61
A Little Dicey
WanderNerd Reliability Score
- 79%
- Arrive within 15 minutes
- 62 min
- Average arrival delay
- 0%
- Cancelled
- 12 min early
- Median arrival delay
Based on 33 historical flights. Data through May 2026.
What the data says
12–3 PM has a slight edge.
Departures between 12–3 PM arrived on time 79% of the time, against 73% between 6–9 PM.
A bit ahead of the Frontier Airlines network.
F9 4559 arrived on time 79% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon—(6 flights)
- Tue—(0 flights)
- Wed—(1 flights)
- Thu—(9 flights)
- Fri—(7 flights)
- Sat—(2 flights)
- Sun—(8 flights)
- 12–3 PM79%(14 flights)
- 3–6 PM—(4 flights)
- 6–9 PM73%(15 flights)
- Departures on time
- 79%
- Diverted
- 0%
- Flights flown
- 33
- Months covered
- 4
Same route, other flights
Keep nerding
Based on 33 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.