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ATIS Alerts Smart Flight Search

Find the flight least likely to be delayed

Beta

We rank real flight numbers by how often they flew and arrived on time over the last 12 months, adjusted for your travel month and departure time, then check nearby airports and calmer connections. US airlines and airports.

LAX → DEN

Los Angeles to Denver: 7,729 nonstop flights a year

On time (12 months)

82%

Cancelled

0.5%

avg delay 13 min

Best time to leave

Before 9 AM

90% on time vs 70% 3 to 6 PM

Most reliable airline

United

86% chance on time

Check LAX to DEN fares

Lowest nonstop fare seen in the next two months: $36 (Frontier 4346 on 2026-11-12). 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 2754

    5:00 AM → 8:22 AM2h 22m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 1686, 1339; its record covers all of them.

    95%

    chance on time

    On time (history)
    96%
    Cancelled
    0.5%
    Avg arrival delay
    3 min
    • Arrived on time 96% of the time (362 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 70%).
    • Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).

    Strong track record · 362 flights

    Find United 2754 fares Opens this date on Aviasales

  2. #2 · United 2610

    7:03 PM → 10:30 PM2h 27m nonstop

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

    91%

    chance on time

    On time (history)
    92%
    Cancelled
    0.3%
    Avg arrival delay
    4 min
    • Arrived on time 92% of the time (294 flights, Jun 2025 to May 2026).
    • Departs inside LAX's trouble window: 53% of its 15 ground stops and delay programs started between 4 PM and 10 PM.

    Strong track record · 294 flights

    Find United 2610 fares Opens this date on Aviasales

  3. #3 · United 1912

    8:45 AM → 12:12 PM2h 32m nonstop

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

    90%

    chance on time

    On time (history)
    90%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 90% of the time (349 flights, Jun 2025 to May 2026).
    • Never cancelled in 349 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 70%).
    • Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).

    Strong track record · 349 flights

    Find United 1912 fares Opens this date on Aviasales

  4. #4 · United 360

    12:55 PM → 4:27 PM2h 32m nonstop

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

    89%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    7 min
    • Arrived on time 91% of the time (109 flights, Jun 2025 to May 2026).
    • Never cancelled in 109 scheduled flights.
    • Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
    • 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 · 109 flights

    Find United 360 fares Opens this date on Aviasales

  5. #5 · United 703

    7:00 AM → 10:32 AM2h 32m nonstop

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

    88%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 88% of the time (86 flights, Jun 2025 to May 2026).
    • Never cancelled in 86 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 70%).
    • Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).

    Moderate track record · 86 flights

    Find United 703 fares Opens this date on Aviasales

  6. #6 · Southwest 1279

    6:35 AM → 9:55 AM2h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-27.

    88%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    1 min
    • Arrived on time 100% of the time (16 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 70%).
    • Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
    • Short track record (16 flights), so its score leans on the airline's record at this hour.

    Limited track record · 16 flights

    Find Southwest 1279 fares Opens this date on Aviasales

  7. #7 · United 1572

    8:07 PM → 11:37 PM2h 30m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    88%

    chance on time

    On time (history)
    95%
    Cancelled
    0.0%
    Avg arrival delay
    1 min
    • Arrived on time 95% of the time (21 flights, Jun 2025 to May 2026).
    • Departs inside LAX's trouble window: 53% of its 15 ground stops and delay programs started between 4 PM and 10 PM.
    • Short track record (21 flights), so its score leans on the airline's record at this hour.

    Limited track record · 21 flights

    Find United 1572 fares Opens this date on Aviasales

  8. #8 · United 2061

    11:00 AM → 2:32 PM2h 32m nonstop

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

    88%

    chance on time

    On time (history)
    89%
    Cancelled
    0.0%
    Avg arrival delay
    7 min
    • Arrived on time 89% of the time (145 flights, Jun 2025 to May 2026).
    • Never cancelled in 146 scheduled flights.
    • Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
    • 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 · 145 flights

    Find United 2061 fares Opens this date on Aviasales

  9. #9 · SkyWest 4957 · sold as United Express, Delta Connection, American Eagle or Alaska

    7:30 AM → 11:01 AM2h 31m nonstop

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

    87%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 91% of the time (11 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 70%).
    • Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
    • Short track record (11 flights), so its score leans on the airline's record at this hour.

    Limited track record · 11 flights

    Find 7:30 AM flight fares Opens this date on Aviasales

  10. #10 · Frontier 3156

    6:15 AM → 9:45 AM2h 30m nonstop

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

    87%

    chance on time

    On time (history)
    88%
    Cancelled
    0.8%
    Avg arrival delay
    11 min
    • Arrived on time 88% of the time (357 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 70%).
    • Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).

    Strong track record · 357 flights

    Find Frontier 3156 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines86%

    3,062 flights · 86% on time as flown · 0.1% cancel

  • Frontier Airlines81%

    731 flights · 82% on time as flown · 1.0% cancel

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

    1,261 flights · 80% on time as flown · 0.8% cancel

  • Delta Air Lines79%

    744 flights · 79% on time as flown · 1.2% cancel

  • Southwest Airlines76%

    1,931 flights · 76% on time as flown · 0.4% cancel

On time by departure time

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

  • Before 9 AM90%

    2,590 flights · avg delay 7 min

  • 9 AM to noon86%

    942 flights · avg delay 9 min

  • Noon to 3 PM75%

    1,817 flights · avg delay 18 min

  • 3 to 6 PM70%

    1,005 flights · avg delay 21 min

  • 6 to 9 PM80%

    1,333 flights · avg delay 13 min

Best day: Tuesday (85%). Worst: Friday (80%).

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