Skip to content
WanderNerd
Check a flight

Route Reliability

Baltimore → Chicago

BWI–MDW · 611 miles · Baltimore/Washington International Thurgood Marshall Airport to Chicago Midway International Airport

75
Usually Fine
WanderNerd Reliability Score
76%
Arrive within 15 minutes
10 min
Average arrival delay
2.0%
Cancelled
1,852
Flights in the data

Data through May 2026.

Airlines on this route

  • Southwest Airlines77% on time · 1,755 flights
  • Frontier Airlines68% on time · 97 flights

Too little history on this route to call a winner. We rank airlines only after 100 flights each.

What the data says

Morning-you made the right choice.

BWI–MDW flights departing between 6–9 AM arrived on time 91% of the time, versus 57% between 9 PM–12 AM.

Skip Monday if you can.

BWI–MDW flights arrived on time 81% of the time on Tuesdays. On Mondays: 73%.

Flights on this route

The breakdown

On-time by weekday
  • Mon73%(286 flights)
  • Tue81%(236 flights)
  • Wed79%(242 flights)
  • Thu77%(269 flights)
  • Fri73%(286 flights)
  • Sat80%(211 flights)
  • Sun74%(277 flights)
On-time by departure window
  • 6–9 AM91%(435 flights)
  • 9 AM–12 PM85%(214 flights)
  • 12–3 PM79%(307 flights)
  • 3–6 PM75%(307 flights)
  • 6–9 PM61%(396 flights)
  • 9 PM–12 AM57%(148 flights)
On-time trend by month
80%
May

Jun 70% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%179
July 202563%179
August 202574%181
September 202587%180
October 202577%184
November 202582%148
December 202565%135
January 202687%120
February 202685%112
March 202669%119
April 202683%130
May 202680%140

Same trip, other airports

Keep nerding

Based on 1,852 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.