Flight Reliability
F9 2420 · Frontier Airlines
Phoenix → Chicago (PHX–MDW)
44
Bring Snacks
WanderNerd Reliability Score
- 63%
- Arrive within 15 minutes
- 40 min
- Average arrival delay
- 3.0%
- Cancelled
- 3 min early
- Median arrival delay
Based on 33 historical flights. Data through May 2026.
What the data says
6–9 PM has a slight edge.
Departures between 6–9 PM arrived on time 65% of the time, against 60% between 3–6 PM.
Lagging the PHX–MDW route.
F9 2420 arrived on time 63% of the time, versus 75% across the PHX–MDW route.
Lagging the Frontier Airlines network.
F9 2420 arrived on time 63% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon—(8 flights)
- Tue—(0 flights)
- Wed—(0 flights)
- Thu—(7 flights)
- Fri—(8 flights)
- Sat—(4 flights)
- Sun—(5 flights)
- 3–6 PM60%(15 flights)
- 6–9 PM65%(17 flights)
- Departures on time
- 56%
- Diverted
- 0%
- Flights flown
- 32
- Months covered
- 3
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.