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Route on-time record

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

Denver (Denver International Airport) to Cleveland (Cleveland Hopkins International Airport). 1,836 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 0.3% were cancelled. The most reliable flight number was United 619 at 10:10 AM.

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

DEN → CLE

Denver to Cleveland: 1,836 nonstop flights a year

On time (12 months)

75%

Cancelled

0.3%

avg delay 17 min

Best time to leave

Before 9 AM

90% on time vs 53% 6 to 9 PM

Most reliable airline

Frontier

81% chance on time

Check DEN to CLE fares

Lowest nonstop fare seen in the next two months: $337 (Frontier 4638 on 2026-10-18). 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 · United 619

    10:10 AM → 3:10 PM3h 00m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 1521; its record covers all of them.

    87%

    chance on time

    On time (history)
    87%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 87% of the time (310 flights, Jun 2025 to May 2026).
    • Never cancelled in 310 scheduled flights.
    • Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).

    Strong track record · 310 flights

    Find United 619 fares Opens this date on Aviasales

  2. #2 · United 506

    10:48 AM → 3:40 PM2h 52m nonstop

    Local times, typical schedule. Last flown 2026-03-28.

    86%

    chance on time

    On time (history)
    83%
    Cancelled
    0.0%
    Avg arrival delay
    12 min
    • Arrived on time 83% of the time (23 flights, Jun 2025 to May 2026).
    • Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
    • 55% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (23 flights), so its score leans on the airline's record at this hour.

    Limited track record · 23 flights

    Find United 506 fares Opens this date on Aviasales

  3. #3 · Frontier 1918

    6:00 AM → 11:09 AM2h 59m nonstop

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

    85%

    chance on time

    On time (history)
    85%
    Cancelled
    1.2%
    Avg arrival delay
    10 min
    • Arrived on time 85% of the time (247 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 90% on time; 6 to 9 PM: 53%).
    • Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).

    Strong track record · 247 flights

    Find Frontier 1918 fares Opens this date on Aviasales

  4. #4 · United 2476

    1:55 PM → 6:53 PM2h 58m nonstop

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

    83%

    chance on time

    On time (history)
    81%
    Cancelled
    1.1%
    Avg arrival delay
    28 min
    • Arrived on time 81% of the time (86 flights, Jun 2025 to May 2026).
    • Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
    • 52% of its delay minutes came from the plane arriving late from an earlier flight.

    Moderate track record · 86 flights

    Find United 2476 fares Opens this date on Aviasales

  5. #5 · United 1790

    5:59 PM → 10:57 PM2h 58m nonstop

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

    77%

    chance on time

    On time (history)
    80%
    Cancelled
    0.0%
    Avg arrival delay
    11 min
    • Arrived on time 80% of the time (217 flights, Jun 2025 to May 2026).
    • Never cancelled in 217 scheduled flights.
    • Departs inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.

    Strong track record · 217 flights

    Find United 1790 fares Opens this date on Aviasales

  6. #6 · Southwest 3280

    10:25 AM → 3:15 PM2h 50m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1185; its record covers all of them.

    73%

    chance on time

    On time (history)
    74%
    Cancelled
    0.0%
    Avg arrival delay
    11 min
    • Arrived on time 74% of the time (69 flights, Jun 2025 to May 2026).
    • Never cancelled in 69 scheduled flights.
    • Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).

    Moderate track record · 69 flights

    Find Southwest 3280 fares Opens this date on Aviasales

  7. #7 · Frontier 4638

    7:54 PM → 12:57 AM3h 03m nonstop

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

    72%

    chance on time

    On time (history)
    70%
    Cancelled
    0.0%
    Avg arrival delay
    10 min
    • Arrived on time 70% of the time (20 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 53% on time; Before 9 AM: 90%).
    • Departs inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
    • 55% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 20 flights

    Find Frontier 4638 fares Opens this date on Aviasales

  8. #8 · Southwest 1164

    8:15 PM → 12:55 AM2h 40m nonstop

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

    51%

    chance on time

    On time (history)
    42%
    Cancelled
    0.0%
    Avg arrival delay
    40 min
    • Arrived on time 42% of the time (33 flights, Jun 2025 to May 2026).
    • Never cancelled in 33 scheduled flights.
    • Leaves in this route's least on-time window (6 to 9 PM: 53% on time; Before 9 AM: 90%).
    • Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).

    Limited track record · 33 flights

    Find Southwest 1164 fares Opens this date on Aviasales

  9. #9 · Southwest 1661

    7:05 PM → 11:50 PM2h 50m nonstop

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

    48%

    chance on time

    On time (history)
    48%
    Cancelled
    0.0%
    Avg arrival delay
    29 min
    • Arrived on time 48% of the time (54 flights, Jun 2025 to May 2026).
    • Never cancelled in 55 scheduled flights.
    • Leaves in this route's least on-time window (6 to 9 PM: 53% on time; Before 9 AM: 90%).
    • Departs inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.

    Limited track record · 54 flights

    Find Southwest 1661 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Frontier Airlines81%

    293 flights · 83% on time as flown · 0.8% cancel

  • United Airlines80%

    938 flights · 81% on time as flown · 0.1% cancel

  • Southwest Airlines64%

    605 flights · 62% on time as flown · 0.3% cancel

On time by departure time

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

  • Before 9 AM90%

    137 flights · avg delay 6 min

  • 9 AM to noon83%

    678 flights · avg delay 9 min

  • Noon to 3 PM81%

    302 flights · avg delay 17 min

  • 3 to 6 PM67%

    457 flights · avg delay 22 min

  • 6 to 9 PM53%

    262 flights · avg delay 33 min

Best day: Wednesday (79%). Worst: Friday (74%).

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
76
F
76
M
75
A
80
M
76
J
67
J
69
A
74
S
79
O
79
N
82
D
78

What delays this route

  • Late-arriving aircraft56%
  • Airline (crew, maintenance, boarding)29%
  • Air traffic control and airport volume14%

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

DEN to CLE questions

What time of day is best to fly DEN to CLE?
Before 9 AM: 90% of flights arrived on time, against 53% 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 DEN to CLE?
Frontier, with a season-adjusted 81% chance of operating and arriving on time over 293 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 DEN to CLE?
June (67% on time); the best was November (82%), 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 DEN

Live status: FAA delays and ground stops