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 → RDU
Chicago to Raleigh/Durham: 1,009 nonstop flights a year
On time (12 months)
81%
Cancelled
1.9%
avg delay 12 min
Best time to leave
9 AM to noon
91% on time vs 74% 6 to 9 PM
Most reliable airline
Southwest
80% chance on time
Lowest nonstop fare seen in the next two months: $244 (Southwest 461 on 2026-11-03). 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 4653
7:45 AM → 10:35 AM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 673, 931; its record covers all of them.
87%
chance on time
- On time (history)
- 88%
- Cancelled
- 1.0%
- Avg arrival delay
- 8 min
- Arrived on time 88% of the time (95 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.
Moderate track record · 95 flights
Find Southwest 4653 fares Opens this date on Aviasales#2 · Southwest 3356
2:40 PM → 5:30 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-29.
74%
chance on time
- On time (history)
- 70%
- Cancelled
- 0.0%
- Avg arrival delay
- 26 min
- Arrived on time 70% of the time (23 flights, Jun 2025 to May 2026).
- 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 (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find Southwest 3356 fares Opens this date on Aviasales#3 · Southwest 3357
6:55 PM → 9:45 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
74%
chance on time
- On time (history)
- 73%
- Cancelled
- 3.7%
- Avg arrival delay
- 18 min
- Arrived on time 73% of the time (52 flights, Jun 2025 to May 2026).
- Cancelled 3.7% of the time (2 of 54).
- Leaves in this route's least on-time window (6 to 9 PM: 74% on time; 9 AM to noon: 91%).
- Departs outside MDW's trouble window (7 AM to 1 PM, when 50% of its 30 ground stops and delay programs started).
Limited track record · 52 flights
Find Southwest 3357 fares Opens this date on Aviasales#4 · Southwest 724
6:45 PM → 9:35 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-04-06.
74%
chance on time
- On time (history)
- 66%
- Cancelled
- 3.0%
- Avg arrival delay
- 14 min
- Arrived on time 66% 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: 74% on time; 9 AM to noon: 91%).
- Departs outside MDW's trouble window (7 AM to 1 PM, when 50% of its 30 ground stops and delay programs started).
Limited track record · 32 flights
Find Southwest 724 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines80%
1,009 flights · 81% on time as flown · 1.9% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM91%
150 flights · avg delay 6 min
- 9 AM to noon91%
181 flights · avg delay 4 min
- Noon to 3 PM78%
225 flights · avg delay 13 min
- 3 to 6 PM78%
150 flights · avg delay 16 min
- 6 to 9 PM74%
302 flights · avg delay 18 min
Best day: Wednesday (81%). Worst: Friday (75%).
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