Route on-time record

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

Chicago (Chicago Midway International Airport) to Houston (William P. Hobby Airport). 1,843 nonstop flights in Jun 2025 to May 2026, 74% arrived within 15 minutes and 1.2% were cancelled. The most reliable flight number was Southwest 150 at 6:30 AM.

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

MDW → HOU

Chicago to Houston: 1,843 nonstop flights a year

On time (12 months)

74%

Cancelled

1.2%

avg delay 13 min

Best time to leave

Before 9 AM

87% on time vs 53% after 9 PM

Most reliable airline

Southwest

74% chance on time

Check MDW to HOU fares

Lowest nonstop fare seen in the next two months: $220 (Southwest 2892 on 2026-10-20). 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 150
6:30 AM → 9:25 AM2h 55m nonstop
Local times, typical schedule. Last flown 2026-04-06.
86%
chance on time
On time (history)
91%
Cancelled
0.0%
Avg arrival delay
4 min
- Arrived on time 91% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 87% on time; After 9 PM: 53%).
- 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 · 33 flights
Find Southwest 150 fares Opens this date on Aviasales
#2 · Southwest 455
6:55 AM → 9:35 AM2h 40m nonstop
Local times, typical schedule. Last flown 2026-05-29.
85%
chance on time
On time (history)
87%
Cancelled
0.0%
Avg arrival delay
5 min
- Arrived on time 87% of the time (39 flights, Jun 2025 to May 2026).
- Never cancelled in 39 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 87% on time; After 9 PM: 53%).
- 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 · 39 flights
Find Southwest 455 fares Opens this date on Aviasales
#3 · Southwest 3102
5:00 AM → 7:40 AM2h 40m nonstop
Local times, typical schedule. Last flown 2026-05-30.
84%
chance on time
On time (history)
88%
Cancelled
0.0%
Avg arrival delay
8 min
- Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 87% on time; After 9 PM: 53%).
- 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 3102 fares Opens this date on Aviasales
#4 · Southwest 3414
10:15 AM → 1:00 PM2h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
On time (history)
85%
Cancelled
0.0%
Avg arrival delay
7 min
- Arrived on time 85% of the time (47 flights, Jun 2025 to May 2026).
- Never cancelled in 47 scheduled flights.
- Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
- Lands inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
Limited track record · 47 flights
Find Southwest 3414 fares Opens this date on Aviasales
#5 · Southwest 4613
8:15 AM → 11:10 AM2h 55m nonstop
Local times, typical schedule. Last flown 2026-04-06.
82%
chance on time
On time (history)
85%
Cancelled
0.0%
Avg arrival delay
6 min
- Arrived on time 85% of the time (13 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 87% on time; After 9 PM: 53%).
- 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 (13 flights), so its score leans on the airline's record at this hour.
Limited track record · 13 flights
Find Southwest 4613 fares Opens this date on Aviasales
#6 · Southwest 2818
11:10 AM → 1:55 PM2h 50m nonstop
Local times, typical schedule. Last flown 2026-04-06.
75%
chance on time
On time (history)
78%
Cancelled
3.0%
Avg arrival delay
14 min
- Arrived on time 78% of the time (32 flights, Jun 2025 to May 2026).
- Cancelled 3.0% of the time (1 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 HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
Limited track record · 32 flights
Find Southwest 2818 fares Opens this date on Aviasales
#7 · Southwest 518
3:00 PM → 5:40 PM2h 40m nonstop
Local times, typical schedule. Last flown 2026-05-31.
73%
chance on time
On time (history)
67%
Cancelled
0.0%
Avg arrival delay
16 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).
- Lands inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
- Short track record (15 flights), so its score leans on the airline's record at this hour.
Limited track record · 15 flights
Find Southwest 518 fares Opens this date on Aviasales
#8 · Southwest 3964
12:10 PM → 2:50 PM2h 40m nonstop
Local times, typical schedule. Last flown 2026-05-31.
73%
chance on time
On time (history)
71%
Cancelled
0.0%
Avg arrival delay
13 min
- Arrived on time 71% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
- Lands inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
Limited track record · 55 flights
Find Southwest 3964 fares Opens this date on Aviasales
#9 · Southwest 2131
5:15 PM → 7:55 PM2h 40m nonstop
Local times, typical schedule. Last flown 2026-05-27.
70%
chance on time
On time (history)
69%
Cancelled
0.0%
Avg arrival delay
12 min
- Arrived on time 69% of the time (16 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 (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find Southwest 2131 fares Opens this date on Aviasales
#10 · Southwest 3253
2:20 PM → 5:05 PM2h 45m nonstop
Local times, typical schedule. Last flown 2026-04-06.
65%
chance on time
On time (history)
64%
Cancelled
0.0%
Avg arrival delay
27 min
- Arrived on time 64% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 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 HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
Limited track record · 33 flights
Find Southwest 3253 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

Southwest Airlines74%
1,843 flights · 74% on time as flown · 1.2% cancel

On time by departure time

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

Before 9 AM87%
563 flights · avg delay 6 min
9 AM to noon80%
251 flights · avg delay 9 min
Noon to 3 PM68%
261 flights · avg delay 19 min
3 to 6 PM72%
200 flights · avg delay 15 min
6 to 9 PM68%
377 flights · avg delay 16 min
After 9 PM53%
191 flights · avg delay 25 min

Best day: Tuesday (78%). Worst: Sunday (70%).

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 aircraft38%
Airline (crew, maintenance, boarding)35%
Air traffic control and airport volume22%
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

MDW to HOU questions

What time of day is best to fly MDW to HOU?: Before 9 AM: 87% of flights arrived on time, against 53% 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 HOU?: Southwest, with a season-adjusted 74% chance of operating and arriving on time over 1,843 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 HOU?: July (55% on time); the best was February (88%), 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.

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