ATL to BUF flight delays
Atlanta, GA (ATL) Buffalo, NY (BUF) · 712 miles
1,508 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
79.03%
Arrived on time
Within 15 minutes of schedule
1.92%
Cancelled
Share of scheduled flights
58 min
When late, late by
Average across delayed arrivals
13 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. Delta Air Lines arrived on time 12.7 points more often than Frontier Airlines over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
The season swings this route hard. In September it ran 23.9 points more punctual than in December — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The Atlanta to Buffalo route sits close to the middle of the record — neither notably punctual nor notably late.
Which airline should you fly on this route?
Over January 2025 – August 2026, Delta Air Lines arrived on time most often on ATL to BUF. Frontier Airlines was late most often. Flights ran closest to schedule in September and worst in December.
Every airline on ATL to BUF
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 1,250 | 81.24% | 1.84% | 50 min | C |
| Frontier Airlines | 257 | 68.53% | 2.33% | 81 min | D |
| Southwest Airlines | 1 | 0% | 0% | 92 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
BUF to ATL Buffalo back to Atlanta 81.45% on time COther routes from Atlanta
Common questions
Are flights from Atlanta to Buffalo usually delayed?
79.03% of flights on the ATL to BUF route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is about the same as the average route in this record.
Which airline is most on time from Atlanta to Buffalo?
Delta Air Lines, at 81.24% on time across 1,250 flights. The least punctual on the route was Frontier Airlines at 68.53%.
How often are ATL to BUF flights cancelled?
1.92% of scheduled flights did not operate — about 19 in every thousand. That is in the normal range.
What is the best month to fly Atlanta to Buffalo?
September, when 91.9% of flights arrived on time. The worst was December at 68%.
When ATL to BUF flights are late, how late are they?
About 58 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on ATL to BUF during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →