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2,095 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Delta is clearly ahead here: 9 in 10 of its flights arrive on time, 36 points better than Frontier.

Best time to leave 7–8 am 92% arrive on time from SJU
Best single flight DL 1879 SJU 06:00 → ATL 09:50 · 96% on time Avoid F9 2871 SJU 17:15 → ATL 21:35 · 54% 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
8
9
10
11
12
13
14
15
16
17
18
SJU
95
94
85
89
84
65
58
77
81
% 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 SJU 12–1 pm: 1Close ×
DL 1757 SJU 12:54 ATL 16:47 3h 53m 300 92% 0.7% 76 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 1,627 91% 0.9% 81 min
Frontier 375 55% 2.1% 91 min
Spirit 93 – 6.5% 66 min

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 1879 SJU 06:00 ATL 09:50 96%
DL 1763 SJU 07:30 ATL 11:20 96%
DL 1757 SJU 12:54 ATL 16:47 92%
DL 1946 SJU 17:56 ATL 21:54 88%
DL 1882 SJU 14:41 ATL 18:37 87%
· · ·
F9 2871 SJU 17:15 ATL 21:35 54%

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 SJU ATL 3h 56m 91% 0.9% 1,627 Flying now
Frontier SJU ATL 4h 20m 55% 2.1% 375 Flying now
Spirit SJU ATL 3h 20m 25% 6.5% 93 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