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 → MHT
Chicago to Manchester: 512 nonstop flights a year
On time (12 months)
74%
Cancelled
1.4%
avg delay 15 min
Best time to leave
9 AM to noon
86% on time vs 69% 6 to 9 PM
Most reliable airline
Southwest
73% chance on time
Lowest nonstop fare seen in the next two months: $154 (Southwest 2970 on 2026-11-16). 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 3314
12:55 PM → 4:00 PM2h 05m nonstop
Local times, typical schedule. Last flown 2026-05-31.
76%
chance on time
- On time (history)
- 74%
- Cancelled
- 0.0%
- Avg arrival delay
- 20 min
- Arrived on time 74% of the time (38 flights, Jun 2025 to May 2026).
- Never cancelled in 38 scheduled flights.
- Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
- Short track record (38 flights), so its score leans on the airline's record at this hour.
Limited track record · 38 flights
Find Southwest 3314 fares Opens this date on Aviasales#2 · Southwest 559
7:00 PM → 10:05 PM2h 05m nonstop
Local times, typical schedule. Last flown 2026-04-06.
69%
chance on time
- On time (history)
- 66%
- Cancelled
- 3.0%
- Avg arrival delay
- 20 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: 69% on time; 9 AM to noon: 86%).
- 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 559 fares Opens this date on Aviasales#3 · Southwest 4034
6:45 PM → 9:55 PM2h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31.
68%
chance on time
- On time (history)
- 64%
- Cancelled
- 0.0%
- Avg arrival delay
- 17 min
- Arrived on time 64% of the time (47 flights, Jun 2025 to May 2026).
- Never cancelled in 47 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 69% on time; 9 AM to noon: 86%).
- 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 · 47 flights
Find Southwest 4034 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines73%
512 flights · 74% on time as flown · 1.4% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- 9 AM to noon86%
57 flights · avg delay 7 min
- Noon to 3 PM79%
109 flights · avg delay 12 min
- 3 to 6 PM74%
61 flights · avg delay 14 min
- 6 to 9 PM69%
272 flights · avg delay 18 min
Best day: Saturday (82%). Worst: Sunday (66%).
Smarter routing
Nearby airports that run more on time
ORD → MHT 80% chance on time
Chicago O'Hare International Airport to Manchester-Boston Regional Airport · 565 flights a year · 15 mi from your airports · yours: 73%
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