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Route on-time record

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

Jacksonville (Jacksonville International Airport) to Denver (Denver International Airport). 973 nonstop flights in Jun 2025 to May 2026, 86% arrived within 15 minutes and 0.2% were cancelled. The most reliable flight number was United 671 at 8:15 AM.

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

JAX → DEN

Jacksonville to Denver: 973 nonstop flights a year

On time (12 months)

86%

Cancelled

0.2%

avg delay 12 min

Best time to leave

9 AM to noon

93% on time vs 74% noon to 3 PM

Most reliable airline

United

89% chance on time

Check JAX 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 · United 671

    8:15 AM → 10:18 AM4h 03m nonstop

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

    92%

    chance on time

    On time (history)
    90%
    Cancelled
    0.0%
    Avg arrival delay
    14 min
    • Arrived on time 90% of the time (104 flights, Jun 2025 to May 2026).
    • Never cancelled in 104 scheduled flights.

    Moderate track record · 104 flights

    Find United 671 fares Opens this date on Aviasales

  2. #2 · Southwest 930

    5:10 AM → 7:00 AM3h 50m nonstop

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

    84%

    chance on time

    On time (history)
    80%
    Cancelled
    0.0%
    Avg arrival delay
    14 min
    • Arrived on time 80% of the time (55 flights, Jun 2025 to May 2026).
    • Never cancelled in 55 scheduled flights.
    • Short track record (55 flights), so its score leans on the airline's record at this hour.

    Limited track record · 55 flights

    Find Southwest 930 fares Opens this date on Aviasales

  3. #3 · United 1651

    4:19 PM → 6:19 PM4h 00m nonstop

    Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as United 2748; its record covers all of them.

    83%

    chance on time

    On time (history)
    79%
    Cancelled
    0.0%
    Avg arrival delay
    16 min
    • Arrived on time 79% of the time (77 flights, Jun 2025 to May 2026).
    • Never cancelled in 77 scheduled flights.
    • Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.

    Moderate track record · 77 flights

    Find United 1651 fares Opens this date on Aviasales

  4. #4 · United 1762

    3:23 PM → 5:07 PM3h 44m nonstop

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

    83%

    chance on time

    On time (history)
    71%
    Cancelled
    0.0%
    Avg arrival delay
    39 min
    • Arrived on time 71% of the time (7 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.
    • 73% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (7 flights), so its score leans on the airline's record at this hour.

    Limited track record · 7 flights

    Find United 1762 fares Opens this date on Aviasales

  5. #5 · Southwest 3100

    5:10 PM → 7:05 PM3h 55m nonstop

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

    79%

    chance on time

    On time (history)
    81%
    Cancelled
    3.0%
    Avg arrival delay
    13 min
    • Arrived on time 81% of the time (32 flights, Jun 2025 to May 2026).
    • Cancelled 3.0% of the time (1 of 33).
    • 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 (32 flights), so its score leans on the airline's record at this hour.

    Limited track record · 32 flights

    Find Southwest 3100 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines89%

    599 flights · 89% on time as flown · 0.2% cancel

  • Southwest Airlines81%

    374 flights · 81% on time as flown · 0.2% cancel

On time by departure time

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

  • Before 9 AM92%

    490 flights · avg delay 9 min

  • 9 AM to noon93%

    61 flights · avg delay 7 min

  • Noon to 3 PM74%

    87 flights · avg delay 13 min

  • 3 to 6 PM78%

    334 flights · avg delay 15 min

Best day: Wednesday (87%). Worst: Friday (81%).

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
83
F
80
M
82
A
83
M
76
J
78
J
79
A
87
S
87
O
92
N
87
D
87

What delays this route

  • Airline (crew, maintenance, boarding)44%
  • Late-arriving aircraft29%
  • Air traffic control and airport volume24%
  • Severe weather3%

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

JAX to DEN questions

What time of day is best to fly JAX to DEN?
9 AM to noon: 93% of flights arrived on time, against 74% for departures noon to 3 PM.
Which airline is most on time from JAX to DEN?
United, with a season-adjusted 89% chance of operating and arriving on time over 599 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 JAX to DEN?
May (76% on time); the best was October (92%), 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 JAX

Live status: FAA delays and ground stops