Southwest Airlines
WN851Houston to Chicago
Southwest Airlines flight WN851 flies from Houston (HOU) to Chicago Midway (MDW), 1,510 km. Over August 2025 to July 2026 it usually arrives about 10 minutes late: 75% of 359 flights arrived within 15 minutes of schedule and 1.1% were cancelled (US Department of Transportation data).
On-time record, last 12 months
75%
on time (within 15 min)
15%
more than 30 min late
1.1%
cancelled
+10 min
average arrival vs schedule
Every operation of WN851, August 2025 to July 2026: 359 flights. Source: US Bureau of Transportation Statistics, public domain.
Routes flown as WN851
- Houston (HOU) to Chicago Midway (MDW)64 flights
- Baltimore (BWI) to Boston (BOS)58 flights
- Burbank (BUR) to Sacramento (SMF)57 flights
- New Orleans (MSY) to Dallas Love Field (DAL)34 flights
- Nashville (BNA) to Denver (DEN)28 flights
- Dallas Love Field (DAL) to Tucson (TUS)21 flights
- Dallas Love Field (DAL) to Denver (DEN)18 flights
- Washington (DCA) to Nashville (BNA)13 flights
- San Jose (SJC) to Burbank (BUR)8 flights
- Tampa (TPA) to Milwaukee (MKE)8 flights
Other flights from Houston to Chicago
More about Houston (HOU) and Chicago Midway (MDW).
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