Best Time to Fly DSM to PHL: On-Time Stats by Hour & Airline
Des Moines International → Philadelphia International
Data through July 2026 · Last updated October 18, 2026
350 flights were scheduled from Des Moines (DSM) to Philadelphia (PHL) in the last 12 months, and 79.4% of those that flew arrived on time, 1.8 points above the US average of 77.6%.
Republic Airways was the most punctual of the 2 airlines on the route at 82.4%, while PSA Airlines trailed at 81.4%.
September has been the best month (90% on time) and Thursday the weakest day of the week (67%).
4.0% of flights were cancelled, versus 1.8% nationally.
DSM to PHL on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airways | 82.4% | 53 min | 3.9% | 77 |
| PSA Airlines | 81.4% | 140 min | 3.6% | 252 |
| Allegiant Air | Limited data | 21 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DSM to PHL
On-time arrival % by scheduled departure hour (local time), 460 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 85.7% | 3.7% | 218 |
| 7am–8am | Limited data | 1 | |
| 12pm–1pm | 73.7% | 1.3% | 77 |
| 1pm–2pm | 75.0% | 7.0% | 143 |
| 3pm–4pm | Limited data | 9 | |
| 4pm–5pm | Limited data | 8 | |
| 5pm–6pm | Limited data | 4 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DSM to PHL
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Summer peak (Jun 15 - Aug 15) | 73.7% | -9.4 pts | 6.1% | 228 |
| All other days | 83.1% | — | 3.0% | 232 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).