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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.

OMA → MDW

Omaha to Chicago: 1,384 nonstop flights a year

On time (12 months)

81%

Cancelled

1.4%

avg delay 11 min

Best time to leave

Before 9 AM

85% on time vs 70% 6 to 9 PM

Most reliable airline

Southwest

80% chance on time

Check OMA to MDW fares

Lowest nonstop fare seen in the next two months: $298 (Southwest 209 on 2026-10-26). 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 2488

    5:20 AM → 6:45 AM1h 25m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1388; its record covers all of them.

    87%

    chance on time

    On time (history)
    90%
    Cancelled
    5.7%
    Avg arrival delay
    8 min
    • Arrived on time 90% of the time (82 flights, Jun 2025 to May 2026).
    • Cancelled 5.7% of the time (5 of 87).
    • Leaves in this route's most on-time window (Before 9 AM: 85% on time; 6 to 9 PM: 70%).

    Moderate track record · 82 flights

    Find Southwest 2488 fares Opens this date on Aviasales

  2. #2 · Southwest 3844

    1:00 PM → 2:25 PM1h 25m nonstop

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

    87%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    1 min
    • Arrived on time 100% of the time (14 flights, Jun 2025 to May 2026).
    • Short track record (14 flights), so its score leans on the airline's record at this hour.

    Limited track record · 14 flights

    Find Southwest 3844 fares Opens this date on Aviasales

  3. #3 · Southwest 2581

    1:55 PM → 3:20 PM1h 25m nonstop

    Local times, typical schedule. Last flown 2026-05-29.

    83%

    chance on time

    On time (history)
    83%
    Cancelled
    0.0%
    Avg arrival delay
    6 min
    • Arrived on time 83% of the time (23 flights, Jun 2025 to May 2026).
    • Short track record (23 flights), so its score leans on the airline's record at this hour.

    Limited track record · 23 flights

    Find Southwest 2581 fares Opens this date on Aviasales

  4. #4 · Southwest 505

    10:30 AM → 11:55 AM1h 25m nonstop

    Local times, typical schedule. Last flown 2026-05-29. Same departure also flew as Southwest 2066; its record covers all of them.

    81%

    chance on time

    On time (history)
    80%
    Cancelled
    2.8%
    Avg arrival delay
    9 min
    • Arrived on time 80% of the time (70 flights, Jun 2025 to May 2026).
    • Lands inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.

    Moderate track record · 70 flights

    Find Southwest 505 fares Opens this date on Aviasales

  5. #5 · Southwest 4123

    2:25 PM → 3:50 PM1h 25m nonstop

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

    77%

    chance on time

    On time (history)
    73%
    Cancelled
    0.0%
    Avg arrival delay
    21 min
    • Arrived on time 73% of the time (15 flights, Jun 2025 to May 2026).
    • 71% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (15 flights), so its score leans on the airline's record at this hour.

    Limited track record · 15 flights

    Find Southwest 4123 fares Opens this date on Aviasales

  6. #6 · Southwest 2157

    4:35 PM → 6:00 PM1h 25m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 3444; its record covers all of them.

    58%

    chance on time

    On time (history)
    50%
    Cancelled
    1.3%
    Avg arrival delay
    20 min
    • Arrived on time 50% of the time (78 flights, Jun 2025 to May 2026).
    • 61% of its delay minutes came from the plane arriving late from an earlier flight.

    Moderate track record · 78 flights

    Find Southwest 2157 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines80%

    1,384 flights · 81% on time as flown · 1.4% cancel

On time by departure time

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

  • Before 9 AM85%

    407 flights · avg delay 7 min

  • 9 AM to noon84%

    292 flights · avg delay 8 min

  • Noon to 3 PM84%

    149 flights · avg delay 10 min

  • 3 to 6 PM76%

    368 flights · avg delay 13 min

  • 6 to 9 PM70%

    168 flights · avg delay 25 min

Best day: Saturday (90%). Worst: Monday (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