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Route Reliability

Buffalo → Chicago

BUF–MDW · 468 miles · Buffalo Niagara International Airport to Chicago Midway International Airport

82
Pretty Reliable
WanderNerd Reliability Score
79%
Arrive within 15 minutes
7 min
Average arrival delay
1.2%
Cancelled
829
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 79% of the time across 829 flights. No comparison to make.

What the data says

Morning flights do better here.

BUF–MDW flights departing between 6–9 AM arrived on time 92% of the time, versus 62% between 6–9 PM.

Sunday scaries are real for this one.

BUF–MDW flights arrived on time 85% of the time on Tuesdays. On Sundays: 73%.

Recent months have been rougher.

BUF–MDW flights arrived on time 73% of the time over the last three months in the data, compared with 84% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon80%(131 flights)
  • Tue85%(123 flights)
  • Wed82%(123 flights)
  • Thu77%(133 flights)
  • Fri80%(132 flights)
  • Sat76%(67 flights)
  • Sun73%(108 flights)
On-time by departure window
  • 3–6 AM87%(37 flights)
  • 6–9 AM92%(316 flights)
  • 9 AM–12 PM82%(49 flights)
  • 12–3 PM82%(87 flights)
  • 3–6 PM75%(89 flights)
  • 6–9 PM62%(234 flights)
  • 9 PM–12 AM—(5 flights)
On-time trend by month
77%
May

Jun 80% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%88
July 202577%95
August 202580%84
September 202590%82
October 202585%59
November 202585%53
December 202571%59
January 202690%30
February 202690%30
March 202661%74
April 202680%81
May 202677%82

Same trip, other airports

Keep nerding

Based on 829 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.