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Route on-time record

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

Billings (Billings Logan International Airport) to Denver (Denver International Airport). 1,786 nonstop flights in Jun 2025 to May 2026, 80% arrived within 15 minutes and 0.9% were cancelled. The most reliable flight number was SkyWest 5829 at 5:05 AM.

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

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BIL → DEN

Billings to Denver: 1,786 nonstop flights a year

On time (12 months)

80%

Cancelled

0.9%

avg delay 17 min

Best time to leave

Before 9 AM

92% on time vs 64% 3 to 6 PM

Most reliable airline

United

81% chance on time

Check BIL 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 · SkyWest 5829 · sold as United Express, Delta Connection, American Eagle or Alaska

    5:05 AM → 7:00 AM1h 55m nonstop

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

    94%

    chance on time

    On time (history)
    95%
    Cancelled
    0.0%
    Avg arrival delay
    9 min
    • Arrived on time 95% of the time (176 flights, Jun 2025 to May 2026).
    • Never cancelled in 176 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 92% on time; 3 to 6 PM: 64%).

    Moderate track record · 176 flights

    Find 5:05 AM flight fares Opens this date on Aviasales

  2. #2 · United 372

    7:00 AM → 8:52 AM1h 52m nonstop

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

    90%

    chance on time

    On time (history)
    90%
    Cancelled
    0.0%
    Avg arrival delay
    9 min
    • Arrived on time 90% of the time (365 flights, Jun 2025 to May 2026).
    • Never cancelled in 365 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 92% on time; 3 to 6 PM: 64%).

    Strong track record · 365 flights

    Find United 372 fares Opens this date on Aviasales

  3. #3 · SkyWest 5463 · sold as United Express, Delta Connection, American Eagle or Alaska

    10:40 AM → 12:32 PM1h 52m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as SkyWest 4728; its record covers all of them.

    87%

    chance on time

    On time (history)
    88%
    Cancelled
    0.7%
    Avg arrival delay
    9 min
    • Arrived on time 88% of the time (293 flights, Jun 2025 to May 2026).

    Strong track record · 293 flights

    Find 10:40 AM flight fares Opens this date on Aviasales

  4. #4 · United 478

    2:35 PM → 4:27 PM1h 52m nonstop

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

    72%

    chance on time

    On time (history)
    73%
    Cancelled
    0.0%
    Avg arrival delay
    20 min
    • Arrived on time 73% of the time (358 flights, Jun 2025 to May 2026).
    • Never cancelled in 364 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 · 358 flights

    Find United 478 fares Opens this date on Aviasales

  5. #5 · SkyWest 4717 · sold as United Express, Delta Connection, American Eagle or Alaska

    4:10 PM → 6:02 PM1h 52m nonstop

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

    65%

    chance on time

    On time (history)
    67%
    Cancelled
    0.0%
    Avg arrival delay
    22 min
    • Arrived on time 67% of the time (9 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (3 to 6 PM: 64% on time; Before 9 AM: 92%).
    • Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.

    Limited track record · 9 flights

    Find 4:10 PM flight fares Opens this date on Aviasales

  6. #6 · SkyWest 4758 · sold as United Express, Delta Connection, American Eagle or Alaska

    5:51 PM → 7:43 PM1h 52m nonstop

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

    65%

    chance on time

    On time (history)
    67%
    Cancelled
    2.4%
    Avg arrival delay
    23 min
    • Arrived on time 67% of the time (282 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (3 to 6 PM: 64% on time; Before 9 AM: 92%).
    • 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 · 282 flights

    Find 5:51 PM flight fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines81%

    730 flights · 82% on time as flown · 0.2% cancel

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)79%

    1,056 flights · 79% on time as flown · 1.4% cancel

On time by departure time

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

  • Before 9 AM92%

    584 flights · avg delay 8 min

  • 9 AM to noon89%

    363 flights · avg delay 9 min

  • Noon to 3 PM73%

    364 flights · avg delay 20 min

  • 3 to 6 PM64%

    464 flights · avg delay 32 min

Best day: Wednesday (84%). Worst: Friday (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
73
M
86
A
85
M
81
J
73
J
75
A
74
S
86
O
87
N
84
D
88

What delays this route

  • Air traffic control and airport volume37%
  • Late-arriving aircraft29%
  • Airline (crew, maintenance, boarding)28%
  • Severe weather6%

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

Finding the most reliable connections from BIL to DEN…

BIL to DEN questions

What time of day is best to fly BIL to DEN?
Before 9 AM: 92% of flights arrived on time, against 64% for departures 3 to 6 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 BIL to DEN?
United, with a season-adjusted 81% chance of operating and arriving on time over 730 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 BIL to DEN?
June (73% on time); the best was December (88%), 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 BIL

Live status: FAA delays and ground stops