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Route Reliability

Chicago → Buffalo

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

79
Usually Fine
WanderNerd Reliability Score
77%
Arrive within 15 minutes
8 min
Average arrival delay
1.3%
Cancelled
830
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 77% of the time across 830 flights. No comparison to make.

What the data says

Morning flights do better here.

MDW–BUF flights departing between 6–9 AM arrived on time 90% of the time, versus 57% between 9 PM–12 AM.

Saturday is the weak spot.

MDW–BUF flights arrived on time 81% of the time on Tuesdays. On Saturdays: 68%.

Trending in the right direction.

MDW–BUF flights arrived on time 80% of the time over the last three months in the data, compared with 73% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon79%(130 flights)
  • Tue81%(122 flights)
  • Wed81%(123 flights)
  • Thu74%(133 flights)
  • Fri74%(134 flights)
  • Sat68%(68 flights)
  • Sun76%(109 flights)
On-time by departure window
  • 6–9 AM90%(99 flights)
  • 9 AM–12 PM86%(164 flights)
  • 12–3 PM78%(205 flights)
  • 3–6 PM68%(80 flights)
  • 6–9 PM72%(190 flights)
  • 9 PM–12 AM57%(81 flights)
On-time trend by month
83%
May

Jun 73% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%89
July 202570%96
August 202575%83
September 202583%82
October 202578%59
November 202578%55
December 202573%59
January 202679%29
February 202666%29
March 202670%74
April 202687%82
May 202683%82

Same trip, other airports

Keep nerding

Based on 830 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.