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.
MDW → FLL
Chicago to Fort Lauderdale: 1,133 nonstop flights a year
On time (12 months)
75%
Cancelled
1.6%
avg delay 15 min
Best time to leave
Before 9 AM
86% on time vs 66% 6 to 9 PM
Most reliable airline
Southwest
74% chance on time
Lowest nonstop fare seen in the next two months: $95 (Southwest 2670 on 2026-11-23). 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 1359
7:55 AM → 11:50 AM2h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 3109; its record covers all of them.
78%
chance on time
- On time (history)
- 79%
- Cancelled
- 1.1%
- Avg arrival delay
- 12 min
- Arrived on time 79% of the time (87 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 86% on time; 6 to 9 PM: 66%).
- Departs 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 1359 fares Opens this date on Aviasales#2 · Southwest 807
1:25 PM → 5:20 PM2h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31.
78%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 90% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 31 scheduled flights.
- Departs outside MDW's trouble window (7 AM to 1 PM, when 50% of its 30 ground stops and delay programs started).
- Lands inside FLL's trouble window: 70% of its 20 ground stops and delay programs started between 1 PM and 7 PM.
Limited track record · 31 flights
Find Southwest 807 fares Opens this date on Aviasales#3 · Southwest 136
6:50 PM → 10:45 PM2h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31.
74%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 66% on time; Before 9 AM: 86%).
- Departs outside MDW's trouble window (7 AM to 1 PM, when 50% of its 30 ground stops and delay programs started).
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 136 fares Opens this date on Aviasales#4 · Southwest 2540
11:40 AM → 3:35 PM2h 55m nonstop
Local times, typical schedule. Last flown 2026-05-30.
72%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 75% of the time (24 flights, Jun 2025 to May 2026).
- Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
- Lands inside FLL's trouble window: 70% of its 20 ground stops and delay programs started between 1 PM and 7 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 2540 fares Opens this date on Aviasales#5 · Southwest 430
12:10 PM → 4:05 PM2h 55m nonstop
Local times, typical schedule. Last flown 2026-04-06.
68%
chance on time
- On time (history)
- 58%
- Cancelled
- 6.1%
- Avg arrival delay
- 17 min
- Arrived on time 58% of the time (31 flights, Jun 2025 to May 2026).
- Cancelled 6.1% of the time (2 of 33).
- Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
- Lands inside FLL's trouble window: 70% of its 20 ground stops and delay programs started between 1 PM and 7 PM.
Limited track record · 31 flights
Find Southwest 430 fares Opens this date on Aviasales#6 · Southwest 1355
6:10 PM → 10:05 PM2h 55m nonstop
Local times, typical schedule. Last flown 2026-04-01.
67%
chance on time
- On time (history)
- 50%
- Cancelled
- 0.0%
- Avg arrival delay
- 28 min
- Arrived on time 50% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 66% on time; Before 9 AM: 86%).
- Departs outside MDW's trouble window (7 AM to 1 PM, when 50% of its 30 ground stops and delay programs started).
- 65% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 8 flights
Find Southwest 1355 fares Opens this date on Aviasales#7 · Southwest 974
7:35 PM → 11:30 PM2h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1689; its record covers all of them.
66%
chance on time
- On time (history)
- 70%
- Cancelled
- 3.8%
- Avg arrival delay
- 23 min
- Arrived on time 70% of the time (76 flights, Jun 2025 to May 2026).
- Cancelled 3.8% of the time (3 of 79).
- Leaves in this route's least on-time window (6 to 9 PM: 66% on time; Before 9 AM: 86%).
- Departs outside MDW's trouble window (7 AM to 1 PM, when 50% of its 30 ground stops and delay programs started).
Moderate track record · 76 flights
Find Southwest 974 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines74%
1,133 flights · 75% on time as flown · 1.6% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM86%
366 flights · avg delay 7 min
- 9 AM to noon81%
74 flights · avg delay 7 min
- Noon to 3 PM68%
257 flights · avg delay 21 min
- 3 to 6 PM73%
133 flights · avg delay 14 min
- 6 to 9 PM66%
303 flights · avg delay 24 min
Best day: Tuesday (79%). Worst: Sunday (72%).
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