BUF to ATL flight delays & on-time performance
Nonstop flights from Buffalo Niagara International Airport to Hartsfield Jackson Atlanta International Airport · 712 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BUF or ATL right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Buffalo (BUF) to Atlanta (ATL) arrived on time 80% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 2.2% were cancelled, and 7% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (83% on time); Frontier Airlines was the least (64%).
- Departures scheduled around 6pm did best (85% on time); around 2pm did worst (56%).
- Wednesday was the most reliable day to fly (87% on time) and Monday the least (73%).
- The largest source of delay minutes was late-arriving aircraft (52%).
Which airline is most on time from BUF to ATL?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Southwest Airlines | 100% | 0.0% | 4 min | 0.0% | 1 |
| Delta Air Lines | 83% | 2.0% | 11 min | 4.8% | 1,249 |
| Frontier Airlines | 64% | 3.0% | 35 min | 17.2% | 270 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am85%365 flights
- 11am70%44 flights
- 12pm80%427 flights
- 1pm76%63 flights
- 2pm56%73 flights
- 4pm81%125 flights
- 5pm75%109 flights
- 6pm85%109 flights
- 7pm81%189 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday73%4.7% cancelled
- Tuesday82%0.5% cancelled
- Wednesday87%0.0% cancelled
- Thursday85%0.9% cancelled
- Friday82%2.9% cancelled
- Saturday80%3.9% cancelled
- Sunday74%2.1% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft52%
- Airline (crew, maintenance, cleaning, fueling)28%
- Air traffic control & airport congestion15%
- Extreme weather5%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)70%
- Extreme weather30%
- Air traffic control & airport congestion0%
- Security0%
BUF to ATL: common questions
- How often are BUF to ATL flights on time?
- 80% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Buffalo to Atlanta cancelled?
- 2.2% of scheduled flights were cancelled (33 of 1,520).
- How long are typical delays?
- Across all flights the average arrival delay was 15 min (early arrivals count as zero). Flights that were late arrived 72 min behind schedule on average, and 7.0% of flights were an hour or more late.
- How long is taxi time at BUF?
- Flights on this route spent 16 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ATL to BUF — 77% on time
More flights from Buffalo
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: BUF → ATL, nonstop flights by US airlines that report to the DOT. How we calculate this.