Route on-time record
BHM to MDW: most on-time flights and the best time to fly
Birmingham (Birmingham-Shuttlesworth International Airport) to Chicago (Chicago Midway International Airport). 509 nonstop flights in Jun 2025 to May 2026, 84% arrived within 15 minutes and 1.4% were cancelled. The most reliable flight number was Southwest 512 at 10:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
BHM → MDW
Birmingham to Chicago: 509 nonstop flights a year
On time (12 months)
84%
Cancelled
1.4%
avg delay 10 min
Best time to leave
Before 9 AM
91% on time vs 67% 3 to 6 PM
Most reliable airline
Southwest
83% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · Southwest 512
10:00 AM → 11:50 AM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
88%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 91% of the time (45 flights, Jun 2025 to May 2026).
- Never cancelled in 46 scheduled flights.
- Lands inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
- Short track record (45 flights), so its score leans on the airline's record at this hour.
Limited track record · 45 flights
Find Southwest 512 fares Opens this date on Aviasales#2 · Southwest 18
2:55 PM → 4:50 PM1h 55m nonstop
Local times, typical schedule. Last flown 2026-05-30. Same departure also flew as Southwest 693; its record covers all of them.
84%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 88% of the time (16 flights, Jun 2025 to May 2026).
- Short track record (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find Southwest 18 fares Opens this date on Aviasales#3 · Southwest 743
9:45 AM → 11:35 AM1h 50m nonstop
Local times, typical schedule. Last flown 2026-04-06.
83%
chance on time
- On time (history)
- 86%
- Cancelled
- 6.7%
- Avg arrival delay
- 10 min
- Arrived on time 86% of the time (14 flights, Jun 2025 to May 2026).
- Lands inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
- Short track record (14 flights), so its score leans on the airline's record at this hour.
Limited track record · 14 flights
Find Southwest 743 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines83%
509 flights · 84% on time as flown · 1.4% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM91%
257 flights · avg delay 8 min
- 9 AM to noon89%
68 flights · avg delay 5 min
- 3 to 6 PM67%
118 flights · avg delay 20 min
- 6 to 9 PM79%
40 flights · avg delay 8 min
Best day: Wednesday (91%). Worst: Sunday (78%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft45%
- Airline (crew, maintenance, boarding)32%
- Air traffic control and airport volume23%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
BHM to MDW questions
- What time of day is best to fly BHM to MDW?
- Before 9 AM: 91% of flights arrived on time, against 67% for departures 3 to 6 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from BHM to MDW?
- Southwest, with a season-adjusted 83% chance of operating and arriving on time over 509 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on BHM to MDW?
- July (75% on time); the best was February (93%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from BHM
- MDW to BHM (return)
- BHM to ATL 88%
- BHM to DFW 79%
- BHM to CLT 84%
- BHM to DEN 84%
- BHM to ORD 77%
- BHM to DCA 77%
- BHM to DAL 81%
- BHM to MCO 79%
- BHM to MIA 85%
- BHM to PHL 83%
- BHM to HOU 85%
- BHM to BNA 75%
Live status: FAA delays and ground stops