Route on-time record
BUF to ATL: most on-time flights and the best time to fly
Buffalo (Buffalo Niagara International Airport) to Atlanta (Hartsfield Jackson Atlanta International Airport). 1,491 nonstop flights in Jun 2025 to May 2026, 80% arrived within 15 minutes and 2.4% were cancelled. The most reliable flight number was Delta 1384 at 12:07 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
BUF → ATL
Buffalo to Atlanta: 1,491 nonstop flights a year
On time (12 months)
80%
Cancelled
2.4%
avg delay 13 min
Best time to leave
Before 9 AM
85% on time vs 74% 3 to 6 PM
Most reliable airline
Delta
80% chance on time
Lowest nonstop fare seen in the next two months: $193 (Frontier 1407 on 2026-10-24). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · Delta 1384
12:07 PM → 2:23 PM2h 11m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 86%
- Cancelled
- 2.2%
- Avg arrival delay
- 7 min
- Arrived on time 86% of the time (357 flights, Jun 2025 to May 2026).
- Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.
Strong track record · 357 flights
Find Delta 1384 fares Opens this date on Aviasales#2 · Delta 2664
6:00 AM → 8:20 AM2h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
- On time (history)
- 85%
- Cancelled
- 2.7%
- Avg arrival delay
- 9 min
- Arrived on time 85% of the time (354 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 85% on time; 3 to 6 PM: 74%).
Strong track record · 354 flights
Find Delta 2664 fares Opens this date on Aviasales#3 · Delta 2084
4:47 PM → 7:04 PM2h 17m nonstop
Local times, typical schedule. Last flown 2026-04-12.
80%
chance on time
- On time (history)
- 84%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 84% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 31 scheduled flights.
- Leaves in this route's least on-time window (3 to 6 PM: 74% on time; Before 9 AM: 85%).
- Short track record (31 flights), so its score leans on the airline's record at this hour.
Limited track record · 31 flights
Find Delta 2084 fares Opens this date on Aviasales#4 · Delta 2050
7:40 PM → 9:59 PM2h 20m nonstop
Local times, typical schedule. Last flown 2026-05-31.
77%
chance on time
- On time (history)
- 79%
- Cancelled
- 2.8%
- Avg arrival delay
- 18 min
- Arrived on time 79% of the time (274 flights, Jun 2025 to May 2026).
Strong track record · 274 flights
Find Delta 2050 fares Opens this date on Aviasales#5 · Delta 2266
4:55 PM → 7:08 PM2h 13m nonstop
Local times, typical schedule. Last flown 2026-05-31.
75%
chance on time
- On time (history)
- 75%
- Cancelled
- 1.0%
- Avg arrival delay
- 13 min
- Arrived on time 75% of the time (194 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 74% on time; Before 9 AM: 85%).
- 57% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 194 flights
Find Delta 2266 fares Opens this date on Aviasales#6 · Frontier 1407
11:36 AM → 1:55 PM2h 19m nonstop
Local times, typical schedule. Last flown 2026-05-31.
68%
chance on time
- On time (history)
- 70%
- Cancelled
- 1.3%
- Avg arrival delay
- 26 min
- Arrived on time 70% of the time (158 flights, Jun 2025 to May 2026).
- Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.
- 77% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 158 flights
Find Frontier 1407 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Delta Air Lines80%
1,244 flights · 83% on time as flown · 2.3% cancel
- Frontier Airlines69%
246 flights · 69% on time as flown · 2.9% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM85%
365 flights · avg delay 9 min
- Noon to 3 PM81%
554 flights · avg delay 13 min
- 3 to 6 PM74%
241 flights · avg delay 15 min
- 6 to 9 PM78%
300 flights · avg delay 19 min
Best day: Wednesday (85%). Worst: Sunday (75%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft53%
- Airline (crew, maintenance, boarding)24%
- Air traffic control and airport volume17%
- Severe weather6%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
BUF to ATL questions
- What time of day is best to fly BUF to ATL?
- Before 9 AM: 85% of flights arrived on time, against 74% for departures 3 to 6 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from BUF to ATL?
- Delta, with a season-adjusted 80% chance of operating and arriving on time over 1,244 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on BUF to ATL?
- January (68% on time); the best was November (86%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from BUF
- ATL to BUF (return)
- BUF to ORD 73%
- BUF to LGA 77%
- BUF to MCO 76%
- BUF to BWI 86%
- BUF to CLT 78%
- BUF to JFK 79%
- BUF to DCA 65%
- BUF to BOS 74%
- BUF to DTW 81%
- BUF to MDW 78%
- BUF to TPA 77%
- BUF to DEN 80%
Live status: FAA delays and ground stops