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Route on-time record

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

Columbus (John Glenn Columbus International Airport) to Baltimore (Baltimore/Washington International Thurgood Marshall Airport). 1,055 nonstop flights in Jun 2025 to May 2026, 88% arrived within 15 minutes and 1.9% were cancelled. The most reliable flight number was Southwest 523 at 5:30 AM.

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

CMH → BWI

Columbus to Baltimore: 1,055 nonstop flights a year

On time (12 months)

88%

Cancelled

1.9%

avg delay 9 min

Best time to leave

Before 9 AM

97% on time vs 64% 6 to 9 PM

Most reliable airline

Southwest

86% chance on time

Check CMH to BWI 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 523

    5:30 AM → 6:50 AM1h 20m nonstop

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

    96%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    0 min
    • Arrived on time 100% of the time (33 flights, Jun 2025 to May 2026).
    • Never cancelled in 33 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 97% on time; 6 to 9 PM: 64%).
    • Short track record (33 flights), so its score leans on the airline's record at this hour.

    Limited track record · 33 flights

    Find Southwest 523 fares Opens this date on Aviasales

  2. #2 · Southwest 2031

    6:05 AM → 7:25 AM1h 20m nonstop

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

    95%

    chance on time

    On time (history)
    100%
    Cancelled
    1.8%
    Avg arrival delay
    0 min
    • Arrived on time 100% of the time (54 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 97% on time; 6 to 9 PM: 64%).
    • Short track record (54 flights), so its score leans on the airline's record at this hour.

    Limited track record · 54 flights

    Find Southwest 2031 fares Opens this date on Aviasales

  3. #3 · Southwest 2162

    9:45 AM → 11:05 AM1h 20m nonstop

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

    93%

    chance on time

    On time (history)
    97%
    Cancelled
    0.0%
    Avg arrival delay
    2 min
    • Arrived on time 97% of the time (39 flights, Jun 2025 to May 2026).
    • Never cancelled in 39 scheduled flights.
    • Short track record (39 flights), so its score leans on the airline's record at this hour.

    Limited track record · 39 flights

    Find Southwest 2162 fares Opens this date on Aviasales

  4. #4 · Southwest 1547

    9:25 AM → 10:45 AM1h 20m nonstop

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

    91%

    chance on time

    On time (history)
    96%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 96% 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 1547 fares Opens this date on Aviasales

  5. #5 · Southwest 3423

    5:05 PM → 6:30 PM1h 25m nonstop

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

    73%

    chance on time

    On time (history)
    71%
    Cancelled
    0.0%
    Avg arrival delay
    22 min
    • Arrived on time 71% of the time (55 flights, Jun 2025 to May 2026).
    • Never cancelled in 55 scheduled flights.
    • Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
    • 62% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 55 flights

    Find Southwest 3423 fares Opens this date on Aviasales

  6. #6 · Southwest 4026

    5:55 PM → 7:15 PM1h 20m nonstop

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

    71%

    chance on time

    On time (history)
    61%
    Cancelled
    0.0%
    Avg arrival delay
    24 min
    • Arrived on time 61% of the time (31 flights, Jun 2025 to May 2026).
    • Never cancelled in 33 scheduled flights.
    • Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
    • 67% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 31 flights

    Find Southwest 4026 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines86%

    1,055 flights · 88% on time as flown · 1.9% cancel

On time by departure time

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

  • Before 9 AM97%

    387 flights · avg delay 3 min

  • 9 AM to noon94%

    173 flights · avg delay 5 min

  • Noon to 3 PM86%

    125 flights · avg delay 12 min

  • 3 to 6 PM78%

    282 flights · avg delay 14 min

  • 6 to 9 PM64%

    88 flights · avg delay 24 min

Best day: Tuesday (91%). Worst: Sunday (86%).

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
90
F
88
M
88
A
93
M
87
J
87
J
81
A
88
S
92
O
92
N
90
D
88

What delays this route

  • Late-arriving aircraft49%
  • Airline (crew, maintenance, boarding)26%
  • Air traffic control and airport volume23%
  • 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 BWI questions

What time of day is best to fly CMH to BWI?
Before 9 AM: 97% of flights arrived on time, against 64% 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 CMH to BWI?
Southwest, with a season-adjusted 86% chance of operating and arriving on time over 1,055 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 BWI?
July (81% on time); the best was April (93%), 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