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Route on-time record

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

Columbus (John Glenn Columbus International Airport) to Denver (Denver International Airport). 1,766 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 0.7% were cancelled. The most reliable flight number was Southwest 753 at 6:35 AM.

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

CMH → DEN

Columbus to Denver: 1,766 nonstop flights a year

On time (12 months)

78%

Cancelled

0.7%

avg delay 16 min

Best time to leave

Before 9 AM

89% on time vs 64% 6 to 9 PM

Most reliable airline

United

81% chance on time

Check CMH to DEN 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 753

    6:35 AM → 7:45 AM3h 10m nonstop

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

    90%

    chance on time

    On time (history)
    94%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 94% of the time (54 flights, Jun 2025 to May 2026).
    • Never cancelled in 54 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 89% 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 753 fares Opens this date on Aviasales

  2. #2 · Southwest 1914

    6:20 AM → 7:40 AM3h 20m nonstop

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

    89%

    chance on time

    On time (history)
    93%
    Cancelled
    0.0%
    Avg arrival delay
    9 min
    • Arrived on time 93% of the time (28 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 64%).
    • Short track record (28 flights), so its score leans on the airline's record at this hour.

    Limited track record · 28 flights

    Find Southwest 1914 fares Opens this date on Aviasales

  3. #3 · Southwest 3745

    6:00 AM → 7:55 PM3h 18m nonstop

    Local times, typical schedule. Last flown 2026-04-05.

    86%

    chance on time

    On time (history)
    80%
    Cancelled
    0.0%
    Avg arrival delay
    33 min
    • Arrived on time 80% of the time (10 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 64%).
    • Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
    • 93% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 10 flights

    Find Southwest 3745 fares Opens this date on Aviasales

  4. #4 · United 728

    8:35 AM → 9:58 AM3h 23m nonstop

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

    85%

    chance on time

    On time (history)
    85%
    Cancelled
    1.1%
    Avg arrival delay
    14 min
    • Arrived on time 85% of the time (361 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 64%).

    Strong track record · 361 flights

    Find United 728 fares Opens this date on Aviasales

  5. #5 · United 1389

    3:30 PM → 4:52 PM3h 25m nonstop

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

    77%

    chance on time

    On time (history)
    78%
    Cancelled
    0.5%
    Avg arrival delay
    16 min
    • Arrived on time 78% of the time (359 flights, Jun 2025 to May 2026).
    • Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.

    Strong track record · 359 flights

    Find United 1389 fares Opens this date on Aviasales

  6. #6 · Southwest 1406

    12:45 PM → 1:55 PM3h 10m nonstop

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

    75%

    chance on time

    On time (history)
    80%
    Cancelled
    0.0%
    Avg arrival delay
    12 min
    • Arrived on time 80% of the time (30 flights, Jun 2025 to May 2026).
    • Never cancelled in 30 scheduled flights.
    • 65% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (30 flights), so its score leans on the airline's record at this hour.

    Limited track record · 30 flights

    Find Southwest 1406 fares Opens this date on Aviasales

  7. #7 · Southwest 4328

    5:30 PM → 6:45 PM3h 15m nonstop

    Local times, typical schedule. Last flown 2026-04-01.

    71%

    chance on time

    On time (history)
    75%
    Cancelled
    0.0%
    Avg arrival delay
    6 min
    • Arrived on time 75% of the time (8 flights, Jun 2025 to May 2026).
    • Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (8 flights), so its score leans on the airline's record at this hour.

    Limited track record · 8 flights

    Find Southwest 4328 fares Opens this date on Aviasales

  8. #8 · Southwest 3188

    12:10 PM → 1:25 PM3h 15m nonstop

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

    69%

    chance on time

    On time (history)
    53%
    Cancelled
    0.0%
    Avg arrival delay
    21 min
    • Arrived on time 53% of the time (15 flights, Jun 2025 to May 2026).
    • Short track record (15 flights), so its score leans on the airline's record at this hour.

    Limited track record · 15 flights

    Find Southwest 3188 fares Opens this date on Aviasales

  9. #9 · Southwest 1295

    6:50 PM → 8:05 PM3h 15m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 3540; its record covers all of them.

    63%

    chance on time

    On time (history)
    65%
    Cancelled
    0.0%
    Avg arrival delay
    24 min
    • Arrived on time 65% of the time (75 flights, Jun 2025 to May 2026).
    • Never cancelled in 75 scheduled flights.
    • Leaves in this route's least on-time window (6 to 9 PM: 64% on time; Before 9 AM: 89%).
    • 56% of its delay minutes came from the plane arriving late from an earlier flight.

    Moderate track record · 75 flights

    Find Southwest 1295 fares Opens this date on Aviasales

  10. #10 · Frontier 1693

    6:43 PM → 8:04 PM3h 26m nonstop

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

    62%

    chance on time

    On time (history)
    65%
    Cancelled
    0.9%
    Avg arrival delay
    24 min
    • Arrived on time 65% of the time (108 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 64% on time; Before 9 AM: 89%).
    • 55% of its delay minutes came from the plane arriving late from an earlier flight.

    Moderate track record · 108 flights

    Find Frontier 1693 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines81%

    729 flights · 82% on time as flown · 0.8% cancel

  • Southwest Airlines77%

    924 flights · 77% on time as flown · 0.6% cancel

  • Frontier Airlines69%

    113 flights · 65% on time as flown · 0.8% cancel

On time by departure time

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

  • Before 9 AM89%

    704 flights · avg delay 11 min

  • Noon to 3 PM74%

    138 flights · avg delay 15 min

  • 3 to 6 PM73%

    461 flights · avg delay 18 min

  • 6 to 9 PM64%

    413 flights · avg delay 23 min

Best day: Wednesday (83%). Worst: Friday (77%).

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
79
F
83
M
82
A
84
M
77
J
69
J
72
A
77
S
86
O
85
N
84
D
82

What delays this route

  • Late-arriving aircraft36%
  • Air traffic control and airport volume32%
  • Airline (crew, maintenance, boarding)29%
  • Severe weather4%

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 DEN questions

What time of day is best to fly CMH to DEN?
Before 9 AM: 89% 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 DEN?
United, with a season-adjusted 81% chance of operating and arriving on time over 729 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 DEN?
June (69% on time); the best was September (86%), 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