Route on-time record
MKE to BWI: most on-time flights and the best time to fly
Milwaukee (General Mitchell International Airport) to Baltimore (Baltimore/Washington International Thurgood Marshall Airport). 836 nonstop flights in Jun 2025 to May 2026, 85% arrived within 15 minutes and 1.9% were cancelled. The most reliable flight number was Southwest 3436 at 7:10 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
MKE → BWI
Milwaukee to Baltimore: 836 nonstop flights a year
On time (12 months)
85%
Cancelled
1.9%
avg delay 11 min
Best time to leave
Before 9 AM
93% on time vs 58% 6 to 9 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 3436
7:10 AM → 10:00 AM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-30.
91%
chance on time
- On time (history)
- 96%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 96% of the time (47 flights, Jun 2025 to May 2026).
- Never cancelled in 47 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 58%).
- Short track record (47 flights), so its score leans on the airline's record at this hour.
Limited track record · 47 flights
Find Southwest 3436 fares Opens this date on Aviasales#2 · Southwest 2202
6:50 AM → 9:45 AM1h 55m nonstop
Local times, typical schedule. Last flown 2026-04-06.
90%
chance on time
- On time (history)
- 95%
- Cancelled
- 4.3%
- Avg arrival delay
- 11 min
- Arrived on time 95% of the time (22 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 58%).
- Short track record (22 flights), so its score leans on the airline's record at this hour.
Limited track record · 22 flights
Find Southwest 2202 fares Opens this date on Aviasales#3 · Southwest 3218
2:15 PM → 5:05 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-30.
87%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
- Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 3218 fares Opens this date on Aviasales#4 · Southwest 3437
3:30 PM → 6:20 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 91% of the time (46 flights, Jun 2025 to May 2026).
- Never cancelled in 46 scheduled flights.
- Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (46 flights), so its score leans on the airline's record at this hour.
Limited track record · 46 flights
Find Southwest 3437 fares Opens this date on Aviasales#5 · Southwest 1445
2:40 PM → 5:30 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-04-01.
85%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
- Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 1445 fares Opens this date on Aviasales#6 · Southwest 682
4:20 PM → 7:05 PM1h 45m nonstop
Local times, typical schedule. Last flown 2026-04-06.
79%
chance on time
- On time (history)
- 80%
- Cancelled
- 0.0%
- Avg arrival delay
- 19 min
- Arrived on time 80% of the time (20 flights, Jun 2025 to May 2026).
- Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (20 flights), so its score leans on the airline's record at this hour.
Limited track record · 20 flights
Find Southwest 682 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines83%
825 flights · 85% on time as flown · 1.9% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM93%
323 flights · avg delay 7 min
- 9 AM to noon90%
81 flights · avg delay 5 min
- Noon to 3 PM91%
183 flights · avg delay 5 min
- 3 to 6 PM73%
151 flights · avg delay 19 min
- 6 to 9 PM58%
98 flights · avg delay 31 min
Best day: Wednesday (88%). Worst: Sunday (80%).
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 aircraft51%
- Air traffic control and airport volume25%
- Airline (crew, maintenance, boarding)22%
- Severe weather2%
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
MKE to BWI questions
- What time of day is best to fly MKE to BWI?
- Before 9 AM: 93% of flights arrived on time, against 58% for departures 6 to 9 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 MKE to BWI?
- Southwest, with a season-adjusted 83% chance of operating and arriving on time over 825 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 MKE to BWI?
- July (78% on time); the best was September (91%), 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 MKE
- BWI to MKE (return)
- MKE to ORD 67%
- MKE to DEN 78%
- MKE to ATL 89%
- MKE to DTW 81%
- MKE to PHX 79%
- MKE to MSP 82%
- MKE to MCO 76%
- MKE to DCA 75%
- MKE to LAS 82%
- MKE to DFW 74%
- MKE to BNA 82%
- MKE to CLT 79%
Live status: FAA delays and ground stops