Best Time to Fly BHM to MDW: On-Time Stats by Hour & Airline
Birmingham-Shuttlesworth International → Chicago Midway International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 86.2% of Birmingham (BHM) to Chicago (MDW) flights arrived on time (457 scheduled flights). That is 8.5 points above the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Wednesday was the most reliable day (93% on time) and June the worst month (77%).
The cancellation rate was 1.1% (US average 1.8%).
BHM 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 | 86.2% | 52 min | 1.1% | 457 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BHM to MDW
On-time arrival % by scheduled departure hour (local time), 1,005 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 96.1% | 1.0% | 208 |
| 6am–7am | 90.8% | 0.7% | 142 |
| 7am–8am | 94.0% | 0.0% | 150 |
| 8am–9am | Limited data | 16 | |
| 9am–10am | Limited data | 20 | |
| 10am–11am | 88.7% | 1.6% | 64 |
| 12pm–1pm | Limited data | 10 | |
| 1pm–2pm | Limited data | 8 | |
| 2pm–3pm | 90.7% | 2.2% | 45 |
| 3pm–4pm | 79.2% | 0.0% | 126 |
| 4pm–5pm | 65.2% | 0.0% | 69 |
| 5pm–6pm | 66.3% | 0.0% | 103 |
| 6pm–7pm | 79.1% | 2.3% | 44 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BHM 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 | 23 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 74.5% | -11.7 pts | 0.0% | 47 |
| Summer peak (Jun 15 - Aug 15) | 87.2% | +1.0 pts | 1.1% | 182 |
| All other days | 86.2% | — | 0.5% | 753 |
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).