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7,750 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 92% depart on time. After 4 pm it’s 62%.

Best time to leave 6–7 am 94% arrive on time from BOS
Best single flight UA 1414 BOS 06:00 → ORD 07:58 · 95% on time Avoid UA 1015 BOS 18:43 → ORD 20:40 · 51% 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
BOS
92
96
90
90
89
84
79
82
75
75
63
72
61
61
52
53
% 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
Chicago flights leaving BOS 1–2 pm: 2Close ×
AA 4386flown by Republic BOS 13:01 ORD 15:10 3h 09m 72 80% 4.2% 160 min
AA 3711flown by Envoy BOS 13:56 ORD 15:59 3h 05m 216 81% 2.8% 127 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 2,733 77% 2.0% 88 min
American (incl. Envoy, Republic) 3,160 74% 3.5% 96 min
JetBlue 544 71% 2.8% 74 min
Delta (incl. Republic) 1,313 67% 4.3% 76 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 1414 BOS 06:00 ORD 07:58 95%
AA 1239 BOS 08:58 ORD 11:00 93%
AA 1509 BOS 07:00 ORD 09:01 90%
UA 1349 BOS 09:50 ORD 11:43 87%
UA 1732 BOS 12:30 ORD 14:23 85%
· · ·
B6 811 BOS 17:20 ORD 19:25 58%
UA 2040 BOS 17:00 ORD 19:00 55%
UA 1015 BOS 18:43 ORD 20:40 51%
All 29 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 BOS ORD 2h 58m 77% 2.0% 2,733 Flying now
American BOS ORD 3h 10m 74% 3.5% 3,160 Flying now
JetBlue BOS ORD 3h 05m 71% 2.8% 544 Flying now
Delta BOS ORD 3h 03m 67% 4.3% 1,313 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