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Route Reliability

Atlanta → Buffalo

ATL–BUF · 712 miles · Hartsfield–Jackson Atlanta International Airport to Buffalo Niagara International Airport

78
Usually Fine
WanderNerd Reliability Score
79%
Arrive within 15 minutes
9 min
Average arrival delay
2.1%
Cancelled
1,492
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.Delta Air Lines81%1,245 flights
  2. 2.Frontier Airlines68%246 flights

Not enough history to rank: Southwest Airlines (1 flights). We rank airlines only after 100 flights on the route.

What the data says

Morning-you made the right choice.

ATL–BUF flights departing between 6–9 AM arrived on time 86% of the time, versus 73% between 3–6 PM.

Sunday scaries are real for this one.

ATL–BUF flights arrived on time 86% of the time on Wednesdays and just 70% on Sundays. That gap is worth planning around.

Delta Air Lines runs this route best.

Delta Air Lines arrived on time 81% of the time on this route; Frontier Airlines managed 68%.

Ticking up lately.

ATL–BUF flights arrived on time 80% of the time over the last three months in the data, compared with 74% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon75%(218 flights)
  • Tue79%(203 flights)
  • Wed86%(187 flights)
  • Thu83%(227 flights)
  • Fri81%(219 flights)
  • Sat76%(174 flights)
  • Sun70%(231 flights)
On-time by departure window
  • 6–9 AM86%(51 flights)
  • 9 AM–12 PM83%(522 flights)
  • 12–3 PM78%(251 flights)
  • 3–6 PM73%(279 flights)
  • 6–9 PM—(3 flights)
  • 9 PM–12 AM76%(353 flights)
On-time trend by month
80%
May

Jun 63% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%119
July 202572%132
August 202582%133
September 202593%124
October 202584%142
November 202584%105
December 202569%100
January 202679%91
February 202674%96
March 202680%126
April 202680%144
May 202680%147

Keep nerding

Based on 1,492 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.