Best Time to Fly PHL to DSM: On-Time Stats by Hour & Airline
Philadelphia International → Des Moines International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 75.0% of Philadelphia (PHL) to Des Moines (DSM) flights arrived on time (349 scheduled flights). That is 2.6 points below the national average of 77.6%.
Republic Airways was the most punctual of the 2 airlines on the route at 77.0%, while PSA Airlines trailed at 77.0%.
September has been the best month (90% on time) and Thursday the weakest day of the week (64%).
3.7% of flights were cancelled, versus 1.8% nationally.
PHL to DSM 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 | 77.0% | 103 min | 3.9% | 77 |
| PSA Airlines | 77.0% | 74 min | 3.2% | 251 |
| Allegiant Air | Limited data | 21 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PHL to DSM
On-time arrival % by scheduled departure hour (local time), 460 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 10am–11am | 84.8% | 2.6% | 155 |
| 11am–12pm | 84.4% | 1.5% | 65 |
| 6pm–7pm | Limited data | 1 | |
| 7pm–8pm | 62.4% | 5.2% | 191 |
| 8pm–9pm | 41.2% | 15.0% | 40 |
| 9pm–10pm | Limited data | 8 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PHL to DSM
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) | 64.0% | -14.2 pts | 6.1% | 228 |
| All other days | 78.2% | — | 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).