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5,558 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 62%.

Best time to leave 1–2 pm 84% arrive on time from ORD
Best single flight UA 2099 ORD 08:45 → SEA 11:38 · 83% on time Avoid AS 337 ORD 17:42 → SEA 20:21 · 49% 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
22
ORD
86
88
86
84
73
68
75
86
70
70
85
58
63
62
58
53
39
% 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
Seattle flights leaving ORD 10–11 pm: 1Close ×
AA 1459 ORD 22:15 SEA 00:52 4h 37m 72 48% 4.2% 57 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 1,504 77% 0.7% 61 min
Delta 907 68% 1.4% 70 min
Alaska 1,796 68% 1.9% 66 min
American 1,351 65% 1.9% 70 min

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 2099 ORD 08:45 SEA 11:38 83%
DL 2041 ORD 06:55 SEA 09:31 74%
UA 1801 ORD 16:20 SEA 19:06 73%
AS 407 ORD 15:43 SEA 18:22 68%
AS 329 ORD 20:20 SEA 23:04 67%
· · ·
AS 587 ORD 08:02 SEA 10:37 64%
UA 2211 ORD 20:05 SEA 22:56 59%
AS 337 ORD 17:42 SEA 20:21 49%
All 24 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 SEA 4h 41m 77% 0.7% 1,504 Flying now
Delta ORD SEA 4h 40m 68% 1.4% 907 Flying now
Alaska ORD SEA 4h 40m 68% 1.9% 1,796 Flying now
American ORD SEA 4h 44m 65% 1.9% 1,351 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