Best Time to Fly MDW to BHM: On-Time Stats by Hour & Airline
Chicago Midway International → Birmingham-Shuttlesworth International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 77.0% of Chicago (MDW) to Birmingham (BHM) flights arrived on time (458 scheduled flights). That is 0.6 points below the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (86% on time) and July the worst month (61%).
The cancellation rate was 1.1% (US average 1.8%).
MDW to BHM 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 | 77.0% | 52 min | 1.1% | 458 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MDW to BHM
On-time arrival % by scheduled departure hour (local time), 1,006 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 7 | |
| 7am–8am | 85.3% | 1.0% | 103 |
| 8am–9am | 88.0% | 0.0% | 50 |
| 9am–10am | 85.2% | 0.0% | 115 |
| 10am–11am | 93.5% | 0.0% | 77 |
| 11am–12pm | Limited data | 24 | |
| 12pm–1pm | 72.2% | 1.4% | 73 |
| 1pm–2pm | Limited data | 28 | |
| 2pm–3pm | 69.2% | 0.0% | 39 |
| 3pm–4pm | 78.0% | 2.4% | 42 |
| 4pm–5pm | 69.7% | 0.0% | 33 |
| 5pm–6pm | Limited data | 16 | |
| 6pm–7pm | 82.3% | 0.0% | 51 |
| 7pm–8pm | Limited data | 12 | |
| 8pm–9pm | 76.5% | 1.7% | 173 |
| 9pm–10pm | 67.3% | 0.0% | 110 |
| 10pm–11pm | 73.6% | 0.0% | 53 |
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 BHM
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) | 76.6% | -6.2 pts | 0.0% | 47 |
| Summer peak (Jun 15 - Aug 15) | 66.5% | -16.3 pts | 1.6% | 182 |
| All other days | 82.8% | — | 0.5% | 754 |
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).