Best Time to Fly GRR to PHL: On-Time Stats by Hour & Airline
Gerald R. Ford International → Philadelphia International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 82.3% of Grand Rapids (GRR) to Philadelphia (PHL) flights arrived on time (356 scheduled flights). That is 4.7 points above the national average of 77.6%.
Among 2 airlines, Republic Airways led with 86.5% on time and PSA Airlines was last with 82.9%.
Over 24 months, Saturday was the most reliable day (90% on time) and July the worst month (66%).
The cancellation rate was 2.8% (US average 1.8%).
GRR 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 | 86.5% | 44 min | 0.0% | 37 |
| PSA Airlines | 82.9% | 83 min | 3.4% | 298 |
| Allegiant Air | Limited data | 21 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly GRR to PHL
On-time arrival % by scheduled departure hour (local time), 386 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 1 | |
| 6am–7am | 93.1% | 3.3% | 61 |
| 7am–8am | 87.9% | 2.0% | 101 |
| 8am–9am | Limited data | 4 | |
| 10am–11am | Limited data | 1 | |
| 12pm–1pm | Limited data | 12 | |
| 1pm–2pm | 74.7% | 5.1% | 79 |
| 2pm–3pm | 82.2% | 0.0% | 90 |
| 3pm–4pm | Limited data | 19 | |
| 6pm–7pm | Limited data | 18 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on GRR 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) | 73.2% | -14.7 pts | 5.9% | 152 |
| All other days | 87.9% | — | 0.8% | 234 |
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).