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.
MCI → MDW
Kansas City to Chicago: 2,097 nonstop flights a year
On time (12 months)
80%
Cancelled
1.1%
avg delay 12 min
Best time to leave
Before 9 AM
89% on time vs 65% 6 to 9 PM
Most reliable airline
Southwest
79% chance on time
Lowest nonstop fare seen in the next two months: $211 (Southwest 4850 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 3814
10:35 AM → 12:00 PM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-29.
89%
chance on time
- On time (history)
- 92%
- Cancelled
- 1.4%
- Avg arrival delay
- 6 min
- Arrived on time 92% of the time (71 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 · 71 flights
Find Southwest 3814 fares Opens this date on Aviasales#2 · Southwest 3313
5:30 AM → 6:55 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 3513; its record covers all of them.
87%
chance on time
- On time (history)
- 86%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 86% of the time (63 flights, Jun 2025 to May 2026).
- Never cancelled in 63 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 65%).
Moderate track record · 63 flights
Find Southwest 3313 fares Opens this date on Aviasales#3 · Southwest 2359
10:45 AM → 12:10 PM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
86%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 88% of the time (16 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 (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find Southwest 2359 fares Opens this date on Aviasales#4 · Southwest 2407
10:05 AM → 11:30 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-04-06.
86%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 85% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 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 (33 flights), so its score leans on the airline's record at this hour.
Limited track record · 33 flights
Find Southwest 2407 fares Opens this date on Aviasales#5 · Southwest 366
1:50 PM → 3:10 PM1h 20m nonstop
Local times, typical schedule. Last flown 2026-04-06.
85%
chance on time
- On time (history)
- 88%
- Cancelled
- 3.0%
- Avg arrival delay
- 11 min
- Arrived on time 88% of the time (32 flights, Jun 2025 to May 2026).
- Cancelled 3.0% of the time (1 of 33).
- 74% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (32 flights), so its score leans on the airline's record at this hour.
Limited track record · 32 flights
Find Southwest 366 fares Opens this date on Aviasales#6 · Southwest 3816
8:30 AM → 9:55 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-04-06.
84%
chance on time
- On time (history)
- 86%
- Cancelled
- 4.3%
- Avg arrival delay
- 11 min
- Arrived on time 86% of the time (22 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 65%).
- 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 (22 flights), so its score leans on the airline's record at this hour.
Limited track record · 22 flights
Find Southwest 3816 fares Opens this date on Aviasales#7 · Southwest 547
8:00 AM → 9:25 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
- On time (history)
- 83%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 83% of the time (47 flights, Jun 2025 to May 2026).
- Never cancelled in 47 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 65%).
- Lands inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
Limited track record · 47 flights
Find Southwest 547 fares Opens this date on Aviasales#8 · Southwest 1286
3:30 PM → 4:55 PM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-30.
73%
chance on time
- On time (history)
- 71%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 71% of the time (24 flights, Jun 2025 to May 2026).
- Short track record (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find Southwest 1286 fares Opens this date on Aviasales#9 · Southwest 1161
6:45 PM → 8:10 PM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-27.
72%
chance on time
- On time (history)
- 69%
- Cancelled
- 0.0%
- Avg arrival delay
- 27 min
- Arrived on time 69% of the time (16 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 65% on time; Before 9 AM: 89%).
- 96% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find Southwest 1161 fares Opens this date on Aviasales#10 · Southwest 3178
4:55 PM → 6:20 PM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
72%
chance on time
- On time (history)
- 72%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 72% of the time (53 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- 63% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (53 flights), so its score leans on the airline's record at this hour.
Limited track record · 53 flights
Find Southwest 3178 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines79%
2,097 flights · 80% on time as flown · 1.1% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM89%
577 flights · avg delay 7 min
- 9 AM to noon88%
390 flights · avg delay 7 min
- Noon to 3 PM84%
312 flights · avg delay 10 min
- 3 to 6 PM70%
431 flights · avg delay 17 min
- 6 to 9 PM65%
332 flights · avg delay 22 min
Best day: Wednesday (88%). Worst: Sunday (77%).
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