Route on-time record
MDW to TUS: most on-time flights and the best time to fly
Chicago (Chicago Midway International Airport) to Tucson (Tucson International Airport). 344 nonstop flights in Jun 2025 to May 2026, 80% arrived within 15 minutes and 0.6% were cancelled. The most reliable flight number was Southwest 972 at 8:40 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
MDW → TUS
Chicago to Tucson: 344 nonstop flights a year
On time (12 months)
80%
Cancelled
0.6%
avg delay 10 min
Best time to leave
Before 9 AM
87% on time vs 50% after 9 PM
Most reliable airline
Southwest
80% chance on time
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 972
8:40 PM → 10:25 PM3h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 100% of the time (15 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 (15 flights), so its score leans on the airline's record at this hour.
Limited track record · 15 flights
Find Southwest 972 fares Opens this date on Aviasales#2 · Southwest 1188
3:25 PM → 5:15 PM3h 50m nonstop
Local times, typical schedule. Last flown 2026-04-05.
83%
chance on time
- On time (history)
- 92%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 92% of the time (13 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 (13 flights), so its score leans on the airline's record at this hour.
Limited track record · 13 flights
Find Southwest 1188 fares Opens this date on Aviasales#3 · Southwest 1421
4:35 PM → 6:20 PM3h 45m nonstop
Local times, typical schedule. Last flown 2026-05-29.
78%
chance on time
- On time (history)
- 79%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 79% of the time (39 flights, Jun 2025 to May 2026).
- Never cancelled in 39 scheduled flights.
- 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 (39 flights), so its score leans on the airline's record at this hour.
Limited track record · 39 flights
Find Southwest 1421 fares Opens this date on Aviasales#4 · Southwest 199
4:05 PM → 5:55 PM3h 50m nonstop
Local times, typical schedule. Last flown 2026-04-06.
75%
chance on time
- On time (history)
- 67%
- Cancelled
- 0.0%
- Avg arrival delay
- 14 min
- Arrived on time 67% of the time (15 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 (15 flights), so its score leans on the airline's record at this hour.
Limited track record · 15 flights
Find Southwest 199 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines80%
344 flights · 80% on time as flown · 0.6% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM87%
112 flights · avg delay 7 min
- Noon to 3 PM84%
68 flights · avg delay 7 min
- 3 to 6 PM76%
72 flights · avg delay 11 min
- 6 to 9 PM82%
38 flights · avg delay 11 min
- After 9 PM50%
31 flights · avg delay 22 min
Best day: Tuesday (85%). Worst: Wednesday (74%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Airline (crew, maintenance, boarding)40%
- Late-arriving aircraft39%
- Air traffic control and airport volume19%
- Severe weather2%
Share of delay minutes by the cause airlines report to the US DOT.
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
MDW to TUS questions
- What time of day is best to fly MDW to TUS?
- Before 9 AM: 87% of flights arrived on time, against 50% for departures after 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from MDW to TUS?
- Southwest, with a season-adjusted 80% chance of operating and arriving on time over 344 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on MDW to TUS?
- July (65% on time); the best was September (90%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from MDW
- TUS to MDW (return)
- MDW to ATL 80%
- MDW to PHX 76%
- MDW to MCO 77%
- MDW to MSP 78%
- MDW to LAS 77%
- MDW to DEN 73%
- MDW to LGA 69%
- MDW to DAL 77%
- MDW to DCA 69%
- MDW to MCI 79%
- MDW to BNA 80%
- MDW to BWI 79%
Live status: FAA delays and ground stops