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Route on-time record

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

Indianapolis (Indianapolis International Airport) to Denver (Denver International Airport). 2,556 nonstop flights in Jun 2025 to May 2026, 77% arrived within 15 minutes and 0.6% were cancelled. The most reliable flight number was Southwest 2571 at 6:50 AM.

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

IND → DEN

Indianapolis to Denver: 2,556 nonstop flights a year

On time (12 months)

77%

Cancelled

0.6%

avg delay 15 min

Best time to leave

Before 9 AM

90% on time vs 65% 6 to 9 PM

Most reliable airline

United

80% chance on time

Check IND 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 2571

    6:50 AM → 7:45 AM2h 55m nonstop

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

    89%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    7 min
    • Arrived on time 91% 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: 90% on time; 6 to 9 PM: 65%).
    • Short track record (33 flights), so its score leans on the airline's record at this hour.

    Limited track record · 33 flights

    Find Southwest 2571 fares Opens this date on Aviasales

  2. #2 · Southwest 2548

    7:00 AM → 7:45 AM2h 45m nonstop

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

    87%

    chance on time

    On time (history)
    93%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 93% of the time (55 flights, Jun 2025 to May 2026).
    • Never cancelled in 55 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 90% on time; 6 to 9 PM: 65%).
    • Short track record (55 flights), so its score leans on the airline's record at this hour.

    Limited track record · 55 flights

    Find Southwest 2548 fares Opens this date on Aviasales

  3. #3 · United 377

    3:38 PM → 4:39 PM3h 00m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 2644; its record covers all of them.

    87%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    13 min
    • Arrived on time 88% of the time (209 flights, Jun 2025 to May 2026).
    • Never cancelled in 209 scheduled flights.
    • 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 · 209 flights

    Find United 377 fares Opens this date on Aviasales

  4. #4 · United 1607

    8:55 AM → 9:56 AM3h 01m nonstop

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

    83%

    chance on time

    On time (history)
    84%
    Cancelled
    1.4%
    Avg arrival delay
    10 min
    • Arrived on time 84% of the time (360 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: 65%).

    Strong track record · 360 flights

    Find United 1607 fares Opens this date on Aviasales

  5. #5 · Southwest 479

    11:45 AM → 12:35 PM2h 50m nonstop

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

    83%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    1 min
    • Arrived on time 100% of the time (10 flights, Jun 2025 to May 2026).
    • Short track record (10 flights), so its score leans on the airline's record at this hour.

    Limited track record · 10 flights

    Find Southwest 479 fares Opens this date on Aviasales

  6. #6 · Southwest 3908

    1:15 PM → 2:05 PM2h 50m nonstop

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

    80%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 88% of the time (24 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 (24 flights), so its score leans on the airline's record at this hour.

    Limited track record · 24 flights

    Find Southwest 3908 fares Opens this date on Aviasales

  7. #7 · Southwest 389

    10:35 AM → 11:20 AM2h 45m nonstop

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

    80%

    chance on time

    On time (history)
    81%
    Cancelled
    0.0%
    Avg arrival delay
    11 min
    • Arrived on time 81% of the time (31 flights, Jun 2025 to May 2026).
    • Never cancelled in 31 scheduled flights.
    • 61% 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 389 fares Opens this date on Aviasales

  8. #8 · Southwest 924

    12:20 PM → 1:10 PM2h 50m nonstop

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

    78%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
    • Short track record (8 flights), so its score leans on the airline's record at this hour.

    Limited track record · 8 flights

    Find Southwest 924 fares Opens this date on Aviasales

  9. #9 · Frontier 2347

    8:33 PM → 9:30 PM3h 03m nonstop

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

    78%

    chance on time

    On time (history)
    79%
    Cancelled
    0.5%
    Avg arrival delay
    16 min
    • Arrived on time 79% of the time (214 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 65% on time; Before 9 AM: 90%).

    Strong track record · 214 flights

    Find Frontier 2347 fares Opens this date on Aviasales

  10. #10 · Southwest 3961

    1:30 PM → 2:20 PM2h 50m nonstop

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

    75%

    chance on time

    On time (history)
    71%
    Cancelled
    6.7%
    Avg arrival delay
    17 min
    • Arrived on time 71% of the time (14 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.
    • 74% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (14 flights), so its score leans on the airline's record at this hour.

    Limited track record · 14 flights

    Find Southwest 3961 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines80%

    861 flights · 81% on time as flown · 0.8% cancel

  • Frontier Airlines77%

    285 flights · 77% on time as flown · 0.4% cancel

  • Southwest Airlines75%

    1,410 flights · 75% on time as flown · 0.5% cancel

On time by departure time

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

  • Before 9 AM90%

    695 flights · avg delay 6 min

  • 9 AM to noon84%

    384 flights · avg delay 8 min

  • Noon to 3 PM83%

    164 flights · avg delay 9 min

  • 3 to 6 PM72%

    655 flights · avg delay 19 min

  • 6 to 9 PM65%

    626 flights · avg delay 23 min

Best day: Tuesday (82%). 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
79
F
81
M
82
A
80
M
78
J
75
J
72
A
80
S
86
O
85
N
86
D
81

What delays this route

  • Late-arriving aircraft39%
  • Air traffic control and airport volume35%
  • Airline (crew, maintenance, boarding)24%
  • 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

IND to DEN questions

What time of day is best to fly IND to DEN?
Before 9 AM: 90% of flights arrived on time, against 65% 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 IND to DEN?
United, with a season-adjusted 80% chance of operating and arriving on time over 861 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 IND to DEN?
July (72% on time); the best was November (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 IND

Live status: FAA delays and ground stops