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.
CLE → MDW
Cleveland to Chicago: 1,108 nonstop flights a year
On time (12 months)
82%
Cancelled
0.9%
avg delay 11 min
Best time to leave
9 AM to noon
90% on time vs 73% 6 to 9 PM
Most reliable airline
Southwest
82% chance on time
Lowest nonstop fare seen in the next two months: $276 (Southwest 1209 on 2026-10-21). 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 1292
3:45 PM → 4:05 PM1h 20m nonstop
Local times, typical schedule. Last flown 2026-05-31.
86%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 93% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Short track record (54 flights), so its score leans on the airline's record at this hour.
Limited track record · 54 flights
Find Southwest 1292 fares Opens this date on Aviasales#2 · Southwest 675
2:45 PM → 3:05 PM1h 20m nonstop
Local times, typical schedule. Last flown 2026-05-31.
86%
chance on time
- On time (history)
- 96%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 96% 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 675 fares Opens this date on Aviasales#3 · Southwest 1378
8:55 AM → 9:10 AM1h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 85% of the time (59 flights, Jun 2025 to May 2026).
- Never cancelled in 59 scheduled flights.
- Lands inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
- Short track record (59 flights), so its score leans on the airline's record at this hour.
Limited track record · 59 flights
Find Southwest 1378 fares Opens this date on Aviasales#4 · Southwest 1875
8:35 AM → 9:00 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-04-06.
80%
chance on time
- On time (history)
- 79%
- Cancelled
- 10.7%
- Avg arrival delay
- 6 min
- Arrived on time 79% of the time (24 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.
- Short track record (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find Southwest 1875 fares Opens this date on Aviasales#5 · Southwest 878
2:30 PM → 2:50 PM1h 20m nonstop
Local times, typical schedule. Last flown 2026-04-06.
79%
chance on time
- On time (history)
- 74%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 74% 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 878 fares Opens this date on Aviasales#6 · Southwest 2211
7:50 PM → 8:10 PM1h 20m nonstop
Local times, typical schedule. Last flown 2026-04-06.
74%
chance on time
- On time (history)
- 60%
- Cancelled
- 0.0%
- Avg arrival delay
- 36 min
- Arrived on time 60% of the time (15 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 73% on time; 9 AM to noon: 90%).
- 61% 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 2211 fares Opens this date on Aviasales#7 · Southwest 3731
8:05 PM → 8:25 PM1h 20m nonstop
Local times, typical schedule. Last flown 2026-05-29. Same departure also flew as Southwest 2841; its record covers all of them.
64%
chance on time
- On time (history)
- 53%
- Cancelled
- 3.0%
- Avg arrival delay
- 21 min
- Arrived on time 53% of the time (32 flights, Jun 2025 to May 2026).
- Cancelled 3.0% of the time (1 of 33).
- Leaves in this route's least on-time window (6 to 9 PM: 73% on time; 9 AM to noon: 90%).
- 66% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 32 flights
Find Southwest 3731 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines82%
1,108 flights · 82% on time as flown · 0.9% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM89%
348 flights · avg delay 6 min
- 9 AM to noon90%
107 flights · avg delay 4 min
- Noon to 3 PM82%
176 flights · avg delay 12 min
- 3 to 6 PM81%
192 flights · avg delay 10 min
- 6 to 9 PM73%
270 flights · avg delay 20 min
Best day: Tuesday (88%). Worst: Thursday (81%).
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