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Route on-time record

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

Chicago (Chicago O'Hare International Airport) to Milwaukee (General Mitchell International Airport). 5,167 nonstop flights in Jun 2025 to May 2026, 64% arrived within 15 minutes and 4.5% were cancelled. The most reliable flight number was SkyWest 6263 at 6:40 AM.

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

ORD → MKE

Chicago to Milwaukee: 5,167 nonstop flights a year

On time (12 months)

64%

Cancelled

4.5%

avg delay 34 min

Best time to leave

Before 9 AM

73% on time vs 56% 3 to 6 PM

Most reliable airline

Republic

69% chance on time

Check ORD to MKE fares

Lowest nonstop fare seen in the next two months: $112 (American 4919 on 2026-11-04). 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 · SkyWest 6263 · sold as United Express, Delta Connection, American Eagle or Alaska

    6:40 AM → 7:42 AM1h 02m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as SkyWest 5010; its record covers all of them.

    74%

    chance on time

    On time (history)
    87%
    Cancelled
    1.9%
    Avg arrival delay
    10 min
    • Arrived on time 87% of the time (52 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 73% on time; 3 to 6 PM: 56%).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
    • Short track record (52 flights), so its score leans on the airline's record at this hour.

    Limited track record · 52 flights

    Find 6:40 AM flight fares Opens this date on Aviasales

  2. #2 · SkyWest 5234 · sold as United Express, Delta Connection, American Eagle or Alaska

    11:30 AM → 12:35 PM1h 05m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    72%

    chance on time

    On time (history)
    76%
    Cancelled
    3.8%
    Avg arrival delay
    18 min
    • Arrived on time 76% of the time (307 flights, Jun 2025 to May 2026).
    • Cancelled 3.8% of the time (12 of 319).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).

    Strong track record · 307 flights

    Find 11:30 AM flight fares Opens this date on Aviasales

  3. #3 · SkyWest 5821 · sold as United Express, Delta Connection, American Eagle or Alaska

    9:25 AM → 10:30 AM1h 05m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    71%

    chance on time

    On time (history)
    75%
    Cancelled
    3.7%
    Avg arrival delay
    16 min
    • Arrived on time 75% of the time (288 flights, Jun 2025 to May 2026).
    • Cancelled 3.7% of the time (11 of 301).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).

    Strong track record · 288 flights

    Find 9:25 AM flight fares Opens this date on Aviasales

  4. #4 · SkyWest 5262 · sold as United Express, Delta Connection, American Eagle or Alaska

    8:41 PM → 9:49 PM1h 07m nonstop

    Local times, typical schedule. Last flown 2026-04-29.

    71%

    chance on time

    On time (history)
    76%
    Cancelled
    4.0%
    Avg arrival delay
    26 min
    • Arrived on time 76% of the time (241 flights, Jun 2025 to May 2026).
    • Cancelled 4.0% of the time (10 of 251).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).

    Strong track record · 241 flights

    Find 8:41 PM flight fares Opens this date on Aviasales

  5. #5 · SkyWest 6324 · sold as United Express, Delta Connection, American Eagle or Alaska

    9:40 AM → 10:43 AM1h 03m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    71%

    chance on time

    On time (history)
    77%
    Cancelled
    0.0%
    Avg arrival delay
    15 min
    • Arrived on time 77% of the time (43 flights, Jun 2025 to May 2026).
    • Never cancelled in 43 scheduled flights.
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
    • Short track record (43 flights), so its score leans on the airline's record at this hour.

    Limited track record · 43 flights

    Find 9:40 AM flight fares Opens this date on Aviasales

  6. #6 · SkyWest 4936 · sold as United Express, Delta Connection, American Eagle or Alaska

    12:22 PM → 1:23 PM1h 01m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    69%

    chance on time

    On time (history)
    77%
    Cancelled
    0.0%
    Avg arrival delay
    11 min
    • Arrived on time 77% of the time (47 flights, Jun 2025 to May 2026).
    • Never cancelled in 47 scheduled flights.
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
    • Short track record (47 flights), so its score leans on the airline's record at this hour.

    Limited track record · 47 flights

    Find 12:22 PM flight fares Opens this date on Aviasales

  7. #7 · SkyWest 4934 · sold as United Express, Delta Connection, American Eagle or Alaska

    2:54 PM → 3:56 PM1h 02m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    69%

    chance on time

    On time (history)
    79%
    Cancelled
    2.3%
    Avg arrival delay
    15 min
    • Arrived on time 79% of the time (43 flights, Jun 2025 to May 2026).
    • Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (43 flights), so its score leans on the airline's record at this hour.

    Limited track record · 43 flights

    Find 2:54 PM flight fares Opens this date on Aviasales

  8. #8 · SkyWest 5362 · sold as United Express, Delta Connection, American Eagle or Alaska

    8:55 AM → 10:00 AM1h 00m nonstop

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

    66%

    chance on time

    On time (history)
    68%
    Cancelled
    3.1%
    Avg arrival delay
    26 min
    • Arrived on time 68% of the time (307 flights, Jun 2025 to May 2026).
    • Cancelled 3.1% of the time (10 of 318).
    • Leaves in this route's most on-time window (Before 9 AM: 73% on time; 3 to 6 PM: 56%).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).

    Strong track record · 307 flights

    Find 8:55 AM flight fares Opens this date on Aviasales

  9. #9 · SkyWest 4711 · sold as United Express, Delta Connection, American Eagle or Alaska

    7:45 PM → 8:48 PM1h 05m nonstop

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

    65%

    chance on time

    On time (history)
    68%
    Cancelled
    6.1%
    Avg arrival delay
    19 min
    • Arrived on time 68% of the time (155 flights, Jun 2025 to May 2026).
    • Cancelled 6.1% of the time (10 of 165).
    • Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.

    Moderate track record · 155 flights

    Find 7:45 PM flight fares Opens this date on Aviasales

  10. #10 · SkyWest 5427 · sold as United Express, Delta Connection, American Eagle or Alaska

    10:30 AM → 11:31 AM1h 01m nonstop

    Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as SkyWest 5276; its record covers all of them.

    65%

    chance on time

    On time (history)
    68%
    Cancelled
    0.0%
    Avg arrival delay
    30 min
    • Arrived on time 68% of the time (50 flights, Jun 2025 to May 2026).
    • Never cancelled in 50 scheduled flights.
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
    • Short track record (50 flights), so its score leans on the airline's record at this hour.

    Limited track record · 50 flights

    Find 10:30 AM flight fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Republic Airways (sold as American Eagle, Delta Connection or United Express)69%

    113 flights · 79% on time as flown · 5.6% cancel

  • Envoy Air (sold as American Eagle)63%

    130 flights · 64% on time as flown · 4.6% cancel

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)60%

    4,898 flights · 63% on time as flown · 4.4% cancel

On time by departure time

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

  • Before 9 AM73%

    378 flights · avg delay 24 min

  • 9 AM to noon71%

    897 flights · avg delay 22 min

  • Noon to 3 PM66%

    828 flights · avg delay 26 min

  • 3 to 6 PM56%

    1,189 flights · avg delay 45 min

  • 6 to 9 PM62%

    1,203 flights · avg delay 41 min

  • After 9 PM63%

    672 flights · avg delay 35 min

Best day: Tuesday (74%). Worst: Sunday (64%).

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
62
F
67
M
67
A
72
M
72
J
67
J
64
A
69
S
74
O
74
N
73
D
61

What delays this route

  • Airline (crew, maintenance, boarding)41%
  • Late-arriving aircraft27%
  • Air traffic control and airport volume16%
  • Severe weather16%

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

ORD to MKE questions

What time of day is best to fly ORD to MKE?
Before 9 AM: 73% of flights arrived on time, against 56% 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 ORD to MKE?
Republic, with a season-adjusted 69% chance of operating and arriving on time over 113 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 ORD to MKE?
December (61% on time); the best was September (74%), 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 ORD

Live status: FAA delays and ground stops