Best Time to Fly MDW to PHL: On-Time Stats by Hour & Airline
Chicago Midway International → Philadelphia International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 76.2% of Chicago (MDW) to Philadelphia (PHL) flights arrived on time (1,522 scheduled flights). That is 1.4 points below the national average of 77.6%.
Frontier Airlines was the most punctual of the 2 airlines on the route at 83.6%, while Southwest Airlines trailed at 75.9%.
November has been the best month (84% on time) and Friday the weakest day of the week (73%).
1.7% of flights were cancelled, versus 1.8% nationally.
MDW 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 |
|---|---|---|---|---|
| Frontier Airlines | 83.6% | 154 min | 1.5% | 68 |
| Southwest Airlines | 75.9% | 59 min | 1.7% | 1,454 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MDW to PHL
On-time arrival % by scheduled departure hour (local time), 3,190 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 96.4% | 0.0% | 56 |
| 6am–7am | 91.7% | 0.0% | 133 |
| 7am–8am | 94.2% | 0.5% | 207 |
| 8am–9am | 88.9% | 1.4% | 293 |
| 9am–10am | 87.4% | 2.4% | 212 |
| 10am–11am | 90.6% | 0.0% | 181 |
| 11am–12pm | 82.0% | 0.8% | 123 |
| 12pm–1pm | 83.5% | 1.1% | 179 |
| 1pm–2pm | 74.3% | 0.6% | 354 |
| 2pm–3pm | 69.8% | 0.7% | 279 |
| 3pm–4pm | 58.6% | 2.7% | 260 |
| 4pm–5pm | 58.9% | 0.0% | 90 |
| 5pm–6pm | 66.4% | 0.0% | 111 |
| 6pm–7pm | 69.6% | 1.9% | 413 |
| 7pm–8pm | 67.1% | 4.0% | 76 |
| 8pm–9pm | 67.7% | 0.0% | 130 |
| 9pm–10pm | 49.4% | 2.2% | 91 |
| 10pm–11pm | Limited data | 2 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MDW to PHL
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 79.7% | +0.4 pts | 2.8% | 71 |
| Christmas & New Year (Dec 20 - Jan 3) | 69.3% | -10.0 pts | 0.0% | 127 |
| Summer peak (Jun 15 - Aug 15) | 67.0% | -12.3 pts | 2.4% | 622 |
| All other days | 79.3% | — | 0.9% | 2,370 |
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).