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Route on-time record

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

Milwaukee (General Mitchell International Airport) to Atlanta (Hartsfield Jackson Atlanta International Airport). 2,262 nonstop flights in Jun 2025 to May 2026, 89% arrived within 15 minutes and 2.1% were cancelled. The most reliable flight number was Delta 2999 at 10:09 AM.

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

MKE → ATL

Milwaukee to Atlanta: 2,262 nonstop flights a year

On time (12 months)

89%

Cancelled

2.1%

avg delay 11 min

Best time to leave

9 AM to noon

93% on time vs 83% 6 to 9 PM

Most reliable airline

Delta

88% chance on time

Check MKE to ATL 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 · Delta 2999

    10:09 AM → 1:09 PM2h 00m nonstop

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

    93%

    chance on time

    On time (history)
    96%
    Cancelled
    2.5%
    Avg arrival delay
    3 min
    • Arrived on time 96% of the time (346 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (9 AM to noon: 93% on time; 6 to 9 PM: 83%).
    • Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.

    Strong track record · 346 flights

    Find Delta 2999 fares Opens this date on Aviasales

  2. #2 · Delta 1333

    3:55 PM → 6:51 PM1h 56m nonstop

    Local times, typical schedule. Last flown 2026-04-12.

    90%

    chance on time

    On time (history)
    100%
    Cancelled
    9.4%
    Avg arrival delay
    1 min
    • Arrived on time 100% of the time (28 flights, Jun 2025 to May 2026).
    • Cancelled 9.4% of the time (3 of 32).
    • Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.
    • Short track record (28 flights), so its score leans on the airline's record at this hour.

    Limited track record · 28 flights

    Find Delta 1333 fares Opens this date on Aviasales

  3. #3 · Delta 1159

    12:33 PM → 3:38 PM2h 05m nonstop

    Local times, typical schedule. Last flown 2026-05-06.

    89%

    chance on time

    On time (history)
    94%
    Cancelled
    5.8%
    Avg arrival delay
    6 min
    • Arrived on time 94% of the time (49 flights, Jun 2025 to May 2026).
    • Cancelled 5.8% of the time (3 of 52).
    • Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.
    • Short track record (49 flights), so its score leans on the airline's record at this hour.

    Limited track record · 49 flights

    Find Delta 1159 fares Opens this date on Aviasales

  4. #4 · Delta 1221

    5:45 AM → 8:49 AM2h 05m nonstop

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

    89%

    chance on time

    On time (history)
    91%
    Cancelled
    1.6%
    Avg arrival delay
    15 min
    • Arrived on time 91% of the time (358 flights, Jun 2025 to May 2026).

    Strong track record · 358 flights

    Find Delta 1221 fares Opens this date on Aviasales

  5. #5 · Delta 1151

    12:43 PM → 3:45 PM2h 02m nonstop

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

    89%

    chance on time

    On time (history)
    90%
    Cancelled
    1.0%
    Avg arrival delay
    5 min
    • Arrived on time 90% of the time (282 flights, Jun 2025 to May 2026).
    • Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.

    Strong track record · 282 flights

    Find Delta 1151 fares Opens this date on Aviasales

  6. #6 · Delta 1236

    7:00 AM → 10:04 AM2h 04m nonstop

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

    88%

    chance on time

    On time (history)
    90%
    Cancelled
    1.6%
    Avg arrival delay
    12 min
    • Arrived on time 90% of the time (358 flights, Jun 2025 to May 2026).

    Strong track record · 358 flights

    Find Delta 1236 fares Opens this date on Aviasales

  7. #7 · Delta 1246

    2:50 PM → 5:51 PM2h 03m nonstop

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

    84%

    chance on time

    On time (history)
    85%
    Cancelled
    1.4%
    Avg arrival delay
    9 min
    • Arrived on time 85% of the time (281 flights, Jun 2025 to May 2026).
    • Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.

    Strong track record · 281 flights

    Find Delta 1246 fares Opens this date on Aviasales

  8. #8 · Delta 2152

    6:46 PM → 9:53 PM2h 07m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Delta 2807; its record covers all of them.

    84%

    chance on time

    On time (history)
    86%
    Cancelled
    3.6%
    Avg arrival delay
    16 min
    • Arrived on time 86% of the time (294 flights, Jun 2025 to May 2026).
    • Cancelled 3.6% of the time (11 of 306).
    • Leaves in this route's least on-time window (6 to 9 PM: 83% on time; 9 AM to noon: 93%).

    Strong track record · 294 flights

    Find Delta 2152 fares Opens this date on Aviasales

  9. #9 · Delta 1206

    6:25 PM → 9:39 PM2h 14m nonstop

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

    81%

    chance on time

    On time (history)
    71%
    Cancelled
    0.0%
    Avg arrival delay
    11 min
    • Arrived on time 71% of the time (14 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 83% on time; 9 AM to noon: 93%).
    • Short track record (14 flights), so its score leans on the airline's record at this hour.

    Limited track record · 14 flights

    Find Delta 1206 fares Opens this date on Aviasales

  10. #10 · Frontier 4700

    12:09 PM → 3:25 PM2h 14m nonstop

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

    74%

    chance on time

    On time (history)
    69%
    Cancelled
    1.9%
    Avg arrival delay
    20 min
    • Arrived on time 69% of the time (52 flights, Jun 2025 to May 2026).
    • Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.
    • 57% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (52 flights), so its score leans on the airline's record at this hour.

    Limited track record · 52 flights

    Find Frontier 4700 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Delta Air Lines88%

    2,209 flights · 90% on time as flown · 2.1% cancel

  • Frontier Airlines79%

    53 flights · 69% on time as flown · 2.0% cancel

On time by departure time

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

  • Before 9 AM90%

    730 flights · avg delay 13 min

  • 9 AM to noon93%

    423 flights · avg delay 5 min

  • Noon to 3 PM90%

    452 flights · avg delay 6 min

  • 3 to 6 PM86%

    439 flights · avg delay 11 min

  • 6 to 9 PM83%

    218 flights · avg delay 21 min

Best day: Wednesday (91%). Worst: Sunday (84%).

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
80
F
89
M
85
A
90
M
85
J
88
J
81
A
88
S
93
O
96
N
91
D
85

What delays this route

  • Airline (crew, maintenance, boarding)44%
  • Late-arriving aircraft28%
  • Air traffic control and airport volume16%
  • Severe weather12%

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 ATL questions

What time of day is best to fly MKE to ATL?
9 AM to noon: 93% of flights arrived on time, against 83% for departures 6 to 9 PM.
Which airline is most on time from MKE to ATL?
Delta, with a season-adjusted 88% chance of operating and arriving on time over 2,209 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 ATL?
January (80% on time); the best was October (96%), 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

Live status: FAA delays and ground stops