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Route Reliability

Buffalo → Phoenix

BUF–PHX · 1,912 miles · Buffalo Niagara International Airport to Phoenix Sky Harbor International Airport

86
Pretty Reliable
WanderNerd Reliability Score
82%
Arrive within 15 minutes
5 min
Average arrival delay
0.4%
Cancelled
245
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 82% of the time across 245 flights. No comparison to make.

What the data says

Morning flights do better here.

BUF–PHX flights departing between 6–9 AM arrived on time 94% of the time, versus 69% between 6–9 PM.

Wednesdays have been rough.

BUF–PHX flights arrived on time 89% of the time on Thursdays and just 59% on Wednesdays. That gap is worth planning around.

Trending in the right direction.

BUF–PHX flights arrived on time 91% 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
  • Mon80%(35 flights)
  • Tue78%(23 flights)
  • Wed59%(22 flights)
  • Thu89%(35 flights)
  • Fri83%(36 flights)
  • Sat86%(55 flights)
  • Sun84%(37 flights)
On-time by departure window
  • 3–6 AM—(9 flights)
  • 6–9 AM94%(34 flights)
  • 9 AM–12 PM—(5 flights)
  • 12–3 PM93%(30 flights)
  • 3–6 PM77%(123 flights)
  • 6–9 PM69%(42 flights)
On-time trend by month
80%
May

Jun 73% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%26
July 202570%27
August 202595%21
September 202595%21
October 202588%34
November 202573%30
December 202557%30
January 202693%14
February 2026100%22
May 202680%10

Keep nerding

Based on 245 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.