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Route on-time record

BWI to MKE: most on-time flights and the best time to fly

Baltimore (Baltimore/Washington International Thurgood Marshall Airport) to Milwaukee (General Mitchell International Airport). 840 nonstop flights in Jun 2025 to May 2026, 77% arrived within 15 minutes and 1.5% were cancelled. The most reliable flight number was Southwest 3055 at 10:30 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

BWI → MKE

Baltimore to Milwaukee: 840 nonstop flights a year

On time (12 months)

77%

Cancelled

1.5%

avg delay 14 min

Best time to leave

Before 9 AM

95% on time vs 61% after 9 PM

Most reliable airline

Southwest

75% chance on time

Check BWI to MKE fares

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. #1 · Southwest 3055

    10:30 AM → 11:35 AM2h 05m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 2147; its record covers all of them.

    84%

    chance on time

    On time (history)
    89%
    Cancelled
    0.0%
    Avg arrival delay
    9 min
    • Arrived on time 89% of the time (36 flights, Jun 2025 to May 2026).
    • Never cancelled in 36 scheduled flights.
    • Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
    • Short track record (36 flights), so its score leans on the airline's record at this hour.

    Limited track record · 36 flights

    Find Southwest 3055 fares Opens this date on Aviasales

  2. #2 · Southwest 2657

    10:50 AM → 11:55 AM2h 05m nonstop

    Local times, typical schedule. Last flown 2026-05-27.

    82%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 88% of the time (16 flights, Jun 2025 to May 2026).
    • Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
    • Short track record (16 flights), so its score leans on the airline's record at this hour.

    Limited track record · 16 flights

    Find Southwest 2657 fares Opens this date on Aviasales

  3. #3 · Southwest 2529

    11:05 AM → 12:10 PM2h 05m nonstop

    Local times, typical schedule. Last flown 2026-05-30.

    77%

    chance on time

    On time (history)
    77%
    Cancelled
    0.0%
    Avg arrival delay
    11 min
    • Arrived on time 77% of the time (31 flights, Jun 2025 to May 2026).
    • Never cancelled in 31 scheduled flights.
    • Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
    • Short track record (31 flights), so its score leans on the airline's record at this hour.

    Limited track record · 31 flights

    Find Southwest 2529 fares Opens this date on Aviasales

  4. #4 · Southwest 1965

    10:00 PM → 11:10 PM2h 10m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    63%

    chance on time

    On time (history)
    62%
    Cancelled
    0.0%
    Avg arrival delay
    15 min
    • Arrived on time 62% of the time (55 flights, Jun 2025 to May 2026).
    • Never cancelled in 55 scheduled flights.
    • Leaves in this route's least on-time window (After 9 PM: 61% on time; Before 9 AM: 95%).
    • Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).

    Limited track record · 55 flights

    Find Southwest 1965 fares Opens this date on Aviasales

  5. #5 · Southwest 1642

    10:45 PM → 11:55 PM2h 10m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    61%

    chance on time

    On time (history)
    62%
    Cancelled
    7.1%
    Avg arrival delay
    23 min
    • Arrived on time 62% of the time (26 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (After 9 PM: 61% on time; Before 9 AM: 95%).
    • Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
    • Short track record (26 flights), so its score leans on the airline's record at this hour.

    Limited track record · 26 flights

    Find Southwest 1642 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines75%

    829 flights · 77% on time as flown · 1.6% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • Before 9 AM95%

    203 flights · avg delay 3 min

  • 9 AM to noon83%

    151 flights · avg delay 8 min

  • Noon to 3 PM77%

    77 flights · avg delay 21 min

  • 3 to 6 PM72%

    86 flights · avg delay 22 min

  • 6 to 9 PM71%

    89 flights · avg delay 12 min

  • After 9 PM61%

    234 flights · avg delay 24 min

Best day: Wednesday (80%). Worst: Sunday (66%).

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.

J
83
F
88
M
77
A
72
M
69
J
69
J
59
A
65
S
85
O
82
N
82
D
73

What delays this route

  • Airline (crew, maintenance, boarding)44%
  • Late-arriving aircraft35%
  • Air traffic control and airport volume16%
  • Severe weather5%

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

Finding the most reliable connections from BWI to MKE…

BWI to MKE questions

What time of day is best to fly BWI to MKE?
Before 9 AM: 95% of flights arrived on time, against 61% for departures after 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 BWI to MKE?
Southwest, with a season-adjusted 75% chance of operating and arriving on time over 829 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 BWI to MKE?
July (59% on time); the best was February (88%), 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 BWI

Live status: FAA delays and ground stops