ATIS Alerts Smart Flight Search
Find the flight least likely to be delayed
BetaWe 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.
CMH → MDW
Columbus to Chicago: 1,263 nonstop flights a year
On time (12 months)
81%
Cancelled
1.3%
avg delay 13 min
Best time to leave
9 AM to noon
93% on time vs 69% 6 to 9 PM
Most reliable airline
Southwest
80% chance on time
Lowest nonstop fare seen in the next two months: $231 (Southwest 779 on 2026-10-31). 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 · Southwest 889
1:15 PM → 1:30 PM1h 15m nonstop
Local times, typical schedule. Last flown 2026-05-27.
89%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (16 flights, Jun 2025 to May 2026).
- Short track record (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find Southwest 889 fares Opens this date on Aviasales#2 · Southwest 1419
8:55 AM → 9:10 AM1h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 3040; its record covers all of them.
85%
chance on time
- On time (history)
- 85%
- Cancelled
- 1.1%
- Avg arrival delay
- 8 min
- Arrived on time 85% of the time (87 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 · 87 flights
Find Southwest 1419 fares Opens this date on Aviasales#3 · Southwest 1420
3:30 PM → 3:50 PM1h 20m nonstop
Local times, typical schedule. Last flown 2026-05-29.
78%
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 1420 fares Opens this date on Aviasales#4 · Southwest 3309
4:30 PM → 4:45 PM1h 15m nonstop
Local times, typical schedule. Last flown 2026-05-30.
78%
chance on time
- On time (history)
- 63%
- Cancelled
- 0.0%
- Avg arrival delay
- 36 min
- Arrived on time 63% of the time (8 flights, Jun 2025 to May 2026).
- 96% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 3309 fares Opens this date on Aviasales#5 · Southwest 1946
3:50 PM → 4:05 PM1h 15m nonstop
Local times, typical schedule. Last flown 2026-04-06.
74%
chance on time
- On time (history)
- 68%
- Cancelled
- 6.1%
- Avg arrival delay
- 21 min
- Arrived on time 68% of the time (31 flights, Jun 2025 to May 2026).
- Cancelled 6.1% of the time (2 of 33).
- 55% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (31 flights), so its score leans on the airline's record at this hour.
Limited track record · 31 flights
Find Southwest 1946 fares Opens this date on Aviasales#6 · Southwest 3104
8:00 PM → 8:15 PM1h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1623; its record covers all of them.
66%
chance on time
- On time (history)
- 65%
- Cancelled
- 0.0%
- Avg arrival delay
- 31 min
- Arrived on time 65% of the time (66 flights, Jun 2025 to May 2026).
- Never cancelled in 66 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 69% on time; 9 AM to noon: 93%).
- 52% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 66 flights
Find Southwest 3104 fares Opens this date on Aviasales#7 · Southwest 3580
8:20 PM → 8:35 PM1h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31.
65%
chance on time
- On time (history)
- 63%
- Cancelled
- 0.0%
- Avg arrival delay
- 22 min
- Arrived on time 63% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 69% on time; 9 AM to noon: 93%).
- 64% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 3580 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines80%
1,263 flights · 81% on time as flown · 1.3% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM91%
370 flights · avg delay 6 min
- 9 AM to noon93%
121 flights · avg delay 5 min
- Noon to 3 PM85%
165 flights · avg delay 8 min
- 3 to 6 PM76%
238 flights · avg delay 17 min
- 6 to 9 PM69%
350 flights · avg delay 21 min
Best day: Tuesday (88%). Worst: Sunday (78%).
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