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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.

COS → DAL

Colorado Springs to Dallas: 840 nonstop flights a year

On time (12 months)

82%

Cancelled

0.6%

avg delay 12 min

Best time to leave

Before 9 AM

96% on time vs 51% 6 to 9 PM

Most reliable airline

Southwest

81% chance on time

Check COS to DAL fares

Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Best trips

8 nonstop, 16 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 50m

    5:00 AM → 7:50 AM

    96%

    arrive on time

    5:00 AM COS → 7:50 AM DAL1h 50m

    Southwest 2462 · also flew as 3441

    Boeing 737 MAX 8 or 737-700 · 1–20 yrs old
    97% on time · 0.4% cancel
    Find Southwest 2462 fares Opens this date on Aviasales

  2. #2 · Nonstop · 1h 50m

    6:30 AM → 9:20 AM

    87%

    arrive on time

    6:30 AM COS → 9:20 AM DAL1h 50m

    Southwest 1668

    Boeing 737 MAX 8 · 1–10 yrs old
    87% on time · 0.5% cancel
    Find Southwest 1668 fares Opens this date on Aviasales

  3. #3 · Nonstop · 1h 50m

    7:10 AM → 10:00 AM

    86%

    arrive on time

    7:10 AM COS → 10:00 AM DAL1h 50m

    Southwest 1140

    Boeing 737-800 or 737 MAX 8 · 3–17 yrs old
    87% on time · 0.6% cancel
    Find Southwest 1140 fares Opens this date on Aviasales

  4. #4 · Nonstop · 1h 50m

    1:30 PM → 4:20 PM

    83%

    arrive on time

    1:30 PM COS → 4:20 PM DAL1h 50m

    Southwest 1211

    Boeing 737-700 · 15–21 yrs old
    84% on time · 0.6% cancel
    Find Southwest 1211 fares Opens this date on Aviasales

  5. #5 · Nonstop · 1h 50m

    11:25 AM → 2:15 PM

    82%

    arrive on time

    11:25 AM COS → 2:15 PM DAL1h 50m

    Southwest 2067

    Boeing 737-700 · 4–22 yrs old
    83% on time · 0.6% cancel
    Find Southwest 2067 fares Opens this date on Aviasales

  6. #6 · Nonstop · 2h 05m

    4:05 PM → 7:10 PM

    78%

    arrive on time

    4:05 PM COS → 7:10 PM DAL2h 05m

    Southwest 2137

    Boeing 737-700 · 16–23 yrs old
    78% on time · 0.5% cancel
    Find Southwest 2137 fares Opens this date on Aviasales

  7. #7 · Nonstop · 1h 50m

    2:30 PM → 5:20 PM

    75%

    arrive on time

    2:30 PM COS → 5:20 PM DAL1h 50m

    Southwest 4525

    Boeing 737-800 or 737 MAX 8 · 1–14 yrs old
    75% on time · 0.5% cancel
    Find Southwest 4525 fares Opens this date on Aviasales

  8. #8 · Nonstop · 1h 45m

    4:45 PM → 7:30 PM

    69%

    arrive on time

    4:45 PM COS → 7:30 PM DAL1h 45m

    Southwest 4499

    Boeing 737-800 or 737 MAX 8 · 1–14 yrs old
    69% on time · 0.5% cancel
    Find Southwest 4499 fares Opens this date on Aviasales

  9. #9 · 1 connection · 5h 40m · one ticket (Southwest)

    6:45 AM → 1:25 PM

    97%

    connections made

    80%

    arrive on time

    6:45 AM COS → 7:40 AM DEN55m

    Southwest 2733

    Boeing 737-700 · 4–23 yrs old
    88% on time · 0.5% cancel
    Connect in DEN · 2h 45m · 98% chance to make it · same ticket: the airline rebooks you if you miss it

    10:25 AM DEN → 1:25 PM DAL2h 00m

    Southwest 420 · also flew as 352

    Boeing 737 MAX 8 or 737-800 · 1–21 yrs old
    83% on time · 1.3% cancel
    Find this Southwest trip Look for Southwest 2733 + Southwest 420 on Aviasales

  10. #10 · 1 connection · 5h 50m · one ticket (Southwest)

    6:35 AM → 1:25 PM

    96%

    connections made

    80%

    arrive on time

    6:35 AM COS → 7:30 AM DEN55m

    Southwest 1989

    Boeing 737-700 · 4–22 yrs old
    88% on time · 0.5% cancel
    Connect in DEN · 2h 55m · 98% chance to make it · same ticket: the airline rebooks you if you miss it

    10:25 AM DEN → 1:25 PM DAL2h 00m

    Southwest 420 · also flew as 352

    Boeing 737 MAX 8 or 737-800 · 1–21 yrs old
    83% on time · 1.3% cancel
    Find this Southwest trip Look for Southwest 1989 + Southwest 420 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.

  • Southwest Airlines81%

    840 flights · 82% on time as flown · 0.6% cancel

On time by departure time

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

  • Before 9 AM96%

    316 flights · avg delay 2 min

  • 9 AM to noon81%

    166 flights · avg delay 12 min

  • Noon to 3 PM80%

    88 flights · avg delay 15 min

  • 3 to 6 PM70%

    201 flights · avg delay 20 min

  • 6 to 9 PM51%

    69 flights · avg delay 34 min

Best day: Saturday (85%). Worst: Thursday (79%).

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