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1,520 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Delta is clearly ahead here: 84% of its flights arrive on time, 19 points better than Frontier.

Best time to leave 6–7 am 86% arrive on time from BUF
Best single flight DL 2664 BUF 06:00 → ATL 08:10 · 86% on time Avoid F9 1407 BUF 12:29 → ATL 14:49 · 64% on time

Time of day × airport

Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).

6
7
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BUF
87
75
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73
63
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63
81
71
% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55
Atlanta flights leaving BUF 7–8 pm: 1Close ×
DL 2054 BUF 19:24 ATL 21:44 2h 20m 42 79% 0.0% 52 min

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.
Delta 1,249 84% 2.0% 62 min
Frontier 270 64% 3.0% 96 min
Southwest 1 – 0.0% –

Dimmed: fewer than 150 flights in the year, too few to rank.

Flights, best and worst

Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.
DL 2664 BUF 06:00 ATL 08:10 86%
DL 1384 BUF 12:14 ATL 14:23 84%
DL 2266 BUF 17:12 ATL 19:25 80%
F9 1407 BUF 12:29 ATL 14:49 64%
All 5 flights on this route →

Nonstops by airline and airport

Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.
Delta BUF ATL 2h 17m 84% 2.0% 1,249 Flying now
Frontier BUF ATL 2h 25m 64% 3.0% 270 Flying now
Southwest BUF ATL – 100%few flights 0.0% 1 Not flying now
Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON