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Route Reliability

Baltimore → Buffalo

BWI–BUF · 281 miles · Baltimore/Washington International Thurgood Marshall Airport to Buffalo Niagara International Airport

77
Usually Fine
WanderNerd Reliability Score
77%
Arrive within 15 minutes
8 min
Average arrival delay
1.7%
Cancelled
1,730
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 1,730 flights. No comparison to make.

What the data says

Morning flights do better here.

BWI–BUF flights departing between 6–9 AM arrived on time 91% of the time, versus 56% between 9 PM–12 AM.

Sunday scaries are real for this one.

BWI–BUF flights arrived on time 82% of the time on Wednesdays. On Sundays: 73%.

Slipping a little lately.

BWI–BUF flights arrived on time 73% of the time over the last three months in the data, compared with 78% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon75%(247 flights)
  • Tue80%(248 flights)
  • Wed82%(249 flights)
  • Thu74%(252 flights)
  • Fri77%(250 flights)
  • Sat76%(218 flights)
  • Sun73%(233 flights)
On-time by departure window
  • 6–9 AM91%(348 flights)
  • 9 AM–12 PM90%(355 flights)
  • 12–3 PM71%(206 flights)
  • 3–6 PM72%(252 flights)
  • 6–9 PM68%(279 flights)
  • 9 PM–12 AM56%(257 flights)
On-time trend by month
72%
May

Jun 65% → May 72% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202565%140
July 202564%137
August 202582%147
September 202588%147
October 202584%149
November 202585%142
December 202569%145
January 202684%122
February 202681%123
March 202665%143
April 202680%148
May 202672%154

Same trip, other airports

Keep nerding

Based on 1,730 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.