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3,870 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 87% depart on time. After 4 pm it’s 64%.

Best time to leave 7–8 am 89% arrive on time from ORD
Best single flight UA 660 ORD 08:46 → SAN 11:21 · 84% on time Avoid AS 1466 ORD 19:59 → SAN 22:33 · 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
19
20
21
ORD
90
91
81
78
72
67
83
80
59
71
71
74
67
58
66
42
% 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
San Diego flights leaving ORD 8–9 am: 1Close ×
UA 660 ORD 08:46 SAN 11:21 4h 35m 365 84% 0.0% 63 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.
United 1,673 78% 0.4% 67 min
Alaska 777 69% 2.3% 73 min
American 1,389 68% 1.7% 67 min
Frontier 31 – 0.0% 119 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.
UA 660 ORD 08:46 SAN 11:21 84%
UA 2683 ORD 13:00 SAN 15:25 81%
AS 1470 ORD 06:20 SAN 08:54 75%
AS 1447 ORD 14:20 SAN 16:59 70%
AS 1466 ORD 19:59 SAN 22:33 54%
All 15 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.
United ORD SAN 4h 30m 78% 0.4% 1,673 Flying now
Alaska ORD SAN 5h 00m 69% 2.3% 777 Flying now
American ORD SAN 4h 32m 68% 1.7% 1,389 Flying now
Frontier ORD SAN 4h 20m 68%few flights 0.0% 31 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