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5,551 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 88% depart on time. After 4 pm it’s 3 in 4.

Best time to leave 10–11 pm 91% arrive on time from SEA
Best single flight UA 2618 SEA 07:00 → ORD 13:15 · 92% on time Avoid AS 429 SEA 10:29 → ORD 16:44 · 56% 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).

5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
SEA
91
89
85
79
71
71
63
72
68
77
74
83
74
% 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

Pick an hour to see this route’s flights leaving then.

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 1,503 81% 0.9% 92 min
Delta 907 78% 1.2% 75 min
American 1,350 74% 1.9% 104 min
Alaska 1,791 74% 1.3% 58 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 2618 SEA 07:00 ORD 13:15 92%
UA 747 SEA 23:11 ORD 05:18 86%
DL 2055 SEA 07:20 ORD 13:30 85%
AS 328 SEA 00:17 ORD 06:20 83%
AS 538 SEA 17:48 ORD 23:59 80%
· · ·
DL 2108 SEA 17:40 ORD 23:39 76%
AS 410 SEA 13:10 ORD 19:21 72%
AS 429 SEA 10:29 ORD 16:44 56%
All 23 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 SEA ORD 4h 10m 81% 0.9% 1,503 Flying now
Delta SEA ORD 4h 10m 78% 1.2% 907 Flying now
American SEA ORD 4h 16m 74% 1.9% 1,350 Flying now
Alaska SEA ORD 4h 09m 74% 1.3% 1,791 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