Flight Reliability
F9 1617 · Frontier Airlines
Philadelphia → Chicago (PHL–MDW)
68
Usually Fine
WanderNerd Reliability Score
- 77%
- Arrive within 15 minutes
- 15 min
- Average arrival delay
- 3.5%
- Cancelled
- 12 min early
- Median arrival delay
Based on 86 historical flights. Data through May 2026.
What the data says
Morning-you made the right choice.
F9 1617 departing between 6–9 AM arrived on time 90% of the time, versus 60% between 3–6 PM.
Mondays have been rough.
F9 1617 arrived on time 93% of the time on Thursdays and just 72% on Mondays. That gap is worth planning around.
A bit ahead of the PHL–MDW route.
F9 1617 arrived on time 77% of the time, versus 73% across the PHL–MDW route.
A bit ahead of the Frontier Airlines network.
F9 1617 arrived on time 77% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon72%(25 flights)
- Tue—(2 flights)
- Wed—(1 flights)
- Thu93%(14 flights)
- Fri80%(25 flights)
- Sat—(2 flights)
- Sun79%(14 flights)
- 6–9 AM90%(29 flights)
- 9 AM–12 PM—(1 flights)
- 12–3 PM87%(15 flights)
- 3–6 PM60%(10 flights)
- 6–9 PM—(8 flights)
- 9 PM–12 AM65%(20 flights)
75%
Nov
Aug 92% → Nov 75% on time
| Month | On-time percentage | Flights |
|---|---|---|
| August 2025 | 92% | 12 |
| September 2025 | 88% | 17 |
| October 2025 | 89% | 18 |
| November 2025 | 75% | 20 |
- Departures on time
- 76%
- Diverted
- 0%
- Flights flown
- 83
- 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.