Route on-time record

AUS to MDW: most on-time flights and the best time to fly

Austin (Austin Bergstrom International Airport) to Chicago (Chicago Midway International Airport). 1,351 nonstop flights in Jun 2025 to May 2026, 79% arrived within 15 minutes and 1.0% were cancelled. The most reliable flight number was Southwest 2225 at 5:10 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

AUS → MDW

Austin to Chicago: 1,351 nonstop flights a year

On time (12 months)

79%

Cancelled

1.0%

avg delay 13 min

Best time to leave

Before 9 AM

92% on time vs 59% 3 to 6 PM

Most reliable airline

Southwest

78% chance on time

Check AUS to MDW fares

Lowest nonstop fare seen in the next two months: $209 (Southwest 2355 on 2026-10-28). 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 2225
5:10 AM → 7:40 AM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 2434; its record covers all of them.
87%
chance on time
On time (history)
87%
Cancelled
0.0%
Avg arrival delay
8 min
- Arrived on time 87% of the time (68 flights, Jun 2025 to May 2026).
- Never cancelled in 69 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; 3 to 6 PM: 59%).
- Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).
Moderate track record · 68 flights
Find Southwest 2225 fares Opens this date on Aviasales
#2 · Southwest 399
12:00 PM → 2:30 PM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-29.
87%
chance on time
On time (history)
96%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 96% of the time (23 flights, Jun 2025 to May 2026).
- Departs inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find Southwest 399 fares Opens this date on Aviasales
#3 · Southwest 398
9:25 AM → 11:55 AM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 485; its record covers all of them.
85%
chance on time
On time (history)
85%
Cancelled
0.0%
Avg arrival delay
7 min
- Arrived on time 85% of the time (88 flights, Jun 2025 to May 2026).
- Never cancelled in 88 scheduled flights.
- Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).
- 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 · 88 flights
Find Southwest 398 fares Opens this date on Aviasales
#4 · Southwest 4012
10:30 PM → 12:55 AM2h 25m nonstop
Local times, typical schedule. Last flown 2026-04-06.
74%
chance on time
On time (history)
64%
Cancelled
6.7%
Avg arrival delay
26 min
- Arrived on time 64% of the time (14 flights, Jun 2025 to May 2026).
- Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).
- 60% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (14 flights), so its score leans on the airline's record at this hour.
Limited track record · 14 flights
Find Southwest 4012 fares Opens this date on Aviasales
#5 · Southwest 403
9:30 PM → 11:55 PM2h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
71%
chance on time
On time (history)
71%
Cancelled
0.0%
Avg arrival delay
21 min
- Arrived on time 71% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).
- 67% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 55 flights
Find Southwest 403 fares Opens this date on Aviasales
#6 · Southwest 400
3:10 PM → 5:45 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1240; its record covers all of them.
58%
chance on time
On time (history)
51%
Cancelled
1.2%
Avg arrival delay
22 min
- Arrived on time 51% of the time (81 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 59% on time; Before 9 AM: 92%).
- Departs inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
Moderate track record · 81 flights
Find Southwest 400 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

Southwest Airlines78%
1,351 flights · 79% on time as flown · 1.0% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

Before 9 AM92%
356 flights · avg delay 6 min
9 AM to noon87%
269 flights · avg delay 7 min
Noon to 3 PM80%
261 flights · avg delay 12 min
3 to 6 PM59%
226 flights · avg delay 24 min
6 to 9 PM64%
106 flights · avg delay 22 min
After 9 PM67%
133 flights · avg delay 22 min

Best day: Saturday (88%). Worst: Sunday (75%).

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

Late-arriving aircraft53%
Airline (crew, maintenance, boarding)27%
Air traffic control and airport volume15%
Severe weather5%

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

AUS to MDW questions

What time of day is best to fly AUS to MDW?: Before 9 AM: 92% of flights arrived on time, against 59% for departures 3 to 6 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 AUS to MDW?: Southwest, with a season-adjusted 78% chance of operating and arriving on time over 1,351 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 AUS to MDW?: July (70% on time); the best was November (86%), 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 AUS

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