Skip to content

All Products

Aviation Intelligence

Alerts & Airspace

Free Pilot Tools & Widgets

RC Aviation

Games & Learning

Weather Research & More

Pilot Resources

My Airports

Your shortcuts, saved on this device. Search to add an airport.

No airports saved yet. Add the fields you visit most.

Ask ATIS

Route on-time record

CMH to MDW: most on-time flights and the best time to fly

Columbus (John Glenn Columbus International Airport) to Chicago (Chicago Midway International Airport). 1,263 nonstop flights in Jun 2025 to May 2026, 81% arrived within 15 minutes and 1.3% were cancelled. The most reliable flight number was Southwest 889 at 1:15 PM.

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

CMH → MDW

Columbus to Chicago: 1,263 nonstop flights a year

On time (12 months)

81%

Cancelled

1.3%

avg delay 13 min

Best time to leave

9 AM to noon

93% on time vs 69% 6 to 9 PM

Most reliable airline

Southwest

80% chance on time

Check CMH to MDW fares

Lowest nonstop fare seen in the next two months: $231 (Southwest 779 on 2026-10-31). 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 889

    1:15 PM → 1:30 PM1h 15m nonstop

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

    89%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    0 min
    • Arrived on time 100% 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 889 fares Opens this date on Aviasales

  2. #2 · Southwest 1419

    8:55 AM → 9:10 AM1h 15m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 3040; its record covers all of them.

    85%

    chance on time

    On time (history)
    85%
    Cancelled
    1.1%
    Avg arrival delay
    8 min
    • Arrived on time 85% of the time (87 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.

    Moderate track record · 87 flights

    Find Southwest 1419 fares Opens this date on Aviasales

  3. #3 · Southwest 1420

    3:30 PM → 3:50 PM1h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-29.

    78%

    chance on time

    On time (history)
    83%
    Cancelled
    0.0%
    Avg arrival delay
    6 min
    • Arrived on time 83% of the time (23 flights, Jun 2025 to May 2026).
    • Short track record (23 flights), so its score leans on the airline's record at this hour.

    Limited track record · 23 flights

    Find Southwest 1420 fares Opens this date on Aviasales

  4. #4 · Southwest 3309

    4:30 PM → 4:45 PM1h 15m nonstop

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

    78%

    chance on time

    On time (history)
    63%
    Cancelled
    0.0%
    Avg arrival delay
    36 min
    • Arrived on time 63% of the time (8 flights, Jun 2025 to May 2026).
    • 96% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (8 flights), so its score leans on the airline's record at this hour.

    Limited track record · 8 flights

    Find Southwest 3309 fares Opens this date on Aviasales

  5. #5 · Southwest 1946

    3:50 PM → 4:05 PM1h 15m nonstop

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

    74%

    chance on time

    On time (history)
    68%
    Cancelled
    6.1%
    Avg arrival delay
    21 min
    • Arrived on time 68% of the time (31 flights, Jun 2025 to May 2026).
    • Cancelled 6.1% of the time (2 of 33).
    • 55% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (31 flights), so its score leans on the airline's record at this hour.

    Limited track record · 31 flights

    Find Southwest 1946 fares Opens this date on Aviasales

  6. #6 · Southwest 3104

    8:00 PM → 8:15 PM1h 15m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1623; its record covers all of them.

    66%

    chance on time

    On time (history)
    65%
    Cancelled
    0.0%
    Avg arrival delay
    31 min
    • Arrived on time 65% of the time (66 flights, Jun 2025 to May 2026).
    • Never cancelled in 66 scheduled flights.
    • Leaves in this route's least on-time window (6 to 9 PM: 69% on time; 9 AM to noon: 93%).
    • 52% of its delay minutes came from the plane arriving late from an earlier flight.

    Moderate track record · 66 flights

    Find Southwest 3104 fares Opens this date on Aviasales

  7. #7 · Southwest 3580

    8:20 PM → 8:35 PM1h 15m nonstop

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

    65%

    chance on time

    On time (history)
    63%
    Cancelled
    0.0%
    Avg arrival delay
    22 min
    • Arrived on time 63% of the time (8 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 69% on time; 9 AM to noon: 93%).
    • 64% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (8 flights), so its score leans on the airline's record at this hour.

    Limited track record · 8 flights

    Find Southwest 3580 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines80%

    1,263 flights · 81% on time as flown · 1.3% cancel

On time by departure time

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

  • Before 9 AM91%

    370 flights · avg delay 6 min

  • 9 AM to noon93%

    121 flights · avg delay 5 min

  • Noon to 3 PM85%

    165 flights · avg delay 8 min

  • 3 to 6 PM76%

    238 flights · avg delay 17 min

  • 6 to 9 PM69%

    350 flights · avg delay 21 min

Best day: Tuesday (88%). 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.

J
80
F
87
M
74
A
84
M
81
J
79
J
74
A
88
S
89
O
87
N
88
D
82

What delays this route

  • Late-arriving aircraft60%
  • Air traffic control and airport volume21%
  • Airline (crew, maintenance, boarding)17%
  • 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

CMH to MDW questions

What time of day is best to fly CMH to MDW?
9 AM to noon: 93% of flights arrived on time, against 69% for departures 6 to 9 PM.
Which airline is most on time from CMH to MDW?
Southwest, with a season-adjusted 80% chance of operating and arriving on time over 1,263 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 CMH to MDW?
July (74% on time); the best was September (89%), 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 CMH

Live status: FAA delays and ground stops