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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.

DEN → SLC

Denver to Salt Lake City: 7,765 nonstop flights a year

On time (12 months)

77%

Cancelled

0.5%

avg delay 15 min

Best time to leave

Before 9 AM

90% on time vs 64% after 9 PM

Most reliable airline

Delta

81% chance on time

Check DEN to SLC fares

Lowest nonstop fare seen in the next two months: $30 (Frontier 4251 on 2026-11-04). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Best trips

30 nonstop, 13 with 1 connection. Best overall weighs the chance you arrive on time as booked, connection odds, travel time and separate tickets.

  1. Best overall#1 · Nonstop · 1h 38m

    6:11 AM → 7:55 AM

    93%

    arrive on time

    6:11 AM DEN → 7:55 AM SLC1h 38m

    Frontier 3861

    Airbus A321neo or A320neo · 1–10 yrs old
    93% on time · 0.2% cancel
    Find Frontier 3861 fares Opens this date on Aviasales

  2. #2 · Nonstop · 1h 46m

    8:00 AM → 9:46 AM

    91%

    arrive on time

    8:00 AM DEN → 9:46 AM SLC1h 46m

    SkyWest 5619 · sold as United Express, Delta Connection, American Eagle or Alaska · also flew as 4798

    Embraer E175 · 10–12 yrs old
    92% on time · 0.6% cancel
    Find 8:00 AM flight fares Opens this date on Aviasales

  3. #3 · Nonstop · 1h 35m

    8:40 AM → 10:15 AM

    90%

    arrive on time

    8:40 AM DEN → 10:15 AM SLC1h 35m

    Southwest 1771

    Boeing 737 MAX 8 or 737-800 · 1–12 yrs old
    91% on time · 0.4% cancel
    Find Southwest 1771 fares Opens this date on Aviasales

  4. #4 · Nonstop · 1h 40m

    8:00 AM → 9:46 AM

    90%

    arrive on time

    8:00 AM DEN → 9:46 AM SLC1h 40m

    Delta 1581

    Airbus A220-100 or A220-300 · 2–26 yrs old
    90% on time · 0.1% cancel
    Find Delta 1581 fares Opens this date on Aviasales

  5. #5 · Nonstop · 1h 39m

    8:00 AM → 9:39 AM

    88%

    arrive on time

    8:00 AM DEN → 9:39 AM SLC1h 39m

    United 497

    Airbus A319 or Boeing 737-800 · 9–29 yrs old
    88% on time · 0.1% cancel
    Find United 497 fares Opens this date on Aviasales

  6. #6 · Nonstop · 1h 38m

    5:30 AM → 7:05 AM

    87%

    arrive on time

    5:30 AM DEN → 7:05 AM SLC1h 38m

    Delta 2544

    Airbus A220-100 or A319 · 4–26 yrs old
    88% on time · 0.4% cancel
    Find Delta 2544 fares Opens this date on Aviasales

  7. #7 · Nonstop · 1h 36m

    1:47 PM → 3:23 PM

    86%

    arrive on time

    1:47 PM DEN → 3:23 PM SLC1h 36m

    United 1840

    Airbus A319 · 3–28 yrs old
    86% on time · 0.1% cancel
    Find United 1840 fares Opens this date on Aviasales

  8. #8 · Nonstop · 1h 30m

    8:55 AM → 10:25 AM

    84%

    arrive on time

    8:55 AM DEN → 10:25 AM SLC1h 30m

    Southwest 4128

    Boeing 737-700 · 19–23 yrs old
    85% on time · 0.4% cancel
    Find Southwest 4128 fares Opens this date on Aviasales

  9. #9 · Nonstop · 1h 35m

    12:35 PM → 2:10 PM

    84%

    arrive on time

    12:35 PM DEN → 2:10 PM SLC1h 35m

    Delta 1553 · also flew as 952

    Airbus A220-100 · 1–7 yrs old
    85% on time · 0.6% cancel
    Find Delta 1553 fares Opens this date on Aviasales

  10. #10 · Nonstop · 1h 40m

    3:35 PM → 5:15 PM

    84%

    arrive on time

    3:35 PM DEN → 5:15 PM SLC1h 40m

    SkyWest 5773 · sold as United Express, Delta Connection, American Eagle or Alaska · also flew as 4773, 4801

    Embraer E175 · 2–12 yrs old
    85% on time · 0.6% cancel
    Find 3:35 PM flight fares Opens this date on Aviasales

Aircraft and ages come from the planes each flight number actually flew in the last 3 months of data (FAA registry build years); airlines can swap planes.

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Delta Air Lines81%

    1,689 flights · 82% on time as flown · 0.4% cancel

  • Frontier Airlines80%

    995 flights · 81% on time as flown · 0.5% cancel

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)78%

    1,381 flights · 79% on time as flown · 0.8% cancel

  • United Airlines78%

    1,353 flights · 77% on time as flown · 0.2% cancel

  • Southwest Airlines71%

    2,347 flights · 71% 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%

    1,614 flights · avg delay 10 min

  • 9 AM to noon82%

    1,204 flights · avg delay 11 min

  • Noon to 3 PM80%

    1,244 flights · avg delay 11 min

  • 3 to 6 PM76%

    1,445 flights · avg delay 16 min

  • 6 to 9 PM66%

    1,527 flights · avg delay 22 min

  • After 9 PM64%

    731 flights · avg delay 26 min

Best day: Tuesday (81%). Worst: Friday (75%).

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