Best Time to Fly MHT to MDW: On-Time Stats by Hour & Airline
Manchester Boston Regional → Chicago Midway International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 87.6% of Manchester (MHT) to Chicago (MDW) flights arrived on time (523 scheduled flights). That is 10.0 points above the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
September has been the best month (99% on time) and Monday the weakest day of the week (81%).
1.0% of flights were cancelled, versus 1.8% nationally.
MHT to MDW 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 |
|---|---|---|---|---|
| Southwest Airlines | 87.6% | 68 min | 1.0% | 523 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MHT to MDW
On-time arrival % by scheduled departure hour (local time), 1,020 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 94.2% | 1.1% | 87 |
| 6am–7am | 95.8% | 0.5% | 194 |
| 7am–8am | 94.4% | 0.4% | 233 |
| 8am–9am | Limited data | 2 | |
| 9am–10am | Limited data | 14 | |
| 12pm–1pm | Limited data | 18 | |
| 1pm–2pm | 88.6% | 0.0% | 35 |
| 2pm–3pm | 84.4% | 0.0% | 32 |
| 3pm–4pm | Limited data | 28 | |
| 5pm–6pm | 85.8% | 0.7% | 149 |
| 6pm–7pm | 78.2% | 1.1% | 89 |
| 7pm–8pm | 64.5% | 0.8% | 126 |
| 8pm–9pm | Limited data | 13 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MHT to MDW
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) | Limited data | 14 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 73.3% | -16.7 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 78.1% | -12.0 pts | 1.3% | 238 |
| All other days | 90.1% | — | 0.4% | 738 |
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).